{"title":"Portable 4 Gas Detectors — LEL, O2, CO and H2S","description":"\u003cp\u003ePortable four-gas detectors in this collection specify the combustible-gas LEL or EX channel, oxygen, carbon monoxide and hydrogen sulfide combination. Compare the complete channel set first, followed by the measuring ranges and required sampling method. The available products include diffusion instruments and internal-pump or separate pump-package choices.\u003c\/p\u003e\u003cp\u003eConfirm the supplied configuration on the selected product page. A pump changes how a sample reaches the sensors, while the named gas channels determine what the instrument measures. Review maintenance, calibration and sample-line requirements for your task. For other gas combinations, browse \u003ca href=\"\/collections\/gas-detector\"\u003eall gas detectors and monitors\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"4-in-1-multi-gas-detector-o2-h2s-co-lel-meter","title":"BH-4A 4 Gas Monitor - O2, H2S, CO and LEL Detection","description":"\u003ch2\u003eChoose the BH-4A Standard or Pump Variant\u003c\/h2\u003e\n\u003cp\u003eThe BH-4A listing offers a handheld O2, H2S, CO and combustible-gas LEL monitor in standard and pump-assisted versions. The variant is a practical purchase choice, so compare the sampling arrangement before comparing the common four-channel display and alarm functions.\u003c\/p\u003e\n\u003ch3\u003eListed Purchase Options\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eOption\u003c\/th\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBH-4A with pump\u003c\/td\u003e\n\u003ctd\u003eINS03-8053\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBH-4A\u003c\/td\u003e\n\u003ctd\u003eINS03-8054\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp\u003eSelect one listed option. Different ranges or pump configurations are separate supplied versions; they are not all combined in one unit.\u003c\/p\u003e\n\u003ch3\u003eQuestions That Help You Choose\u003c\/h3\u003e\n\u003ch4\u003eWhich BH-4A variant do I need?\u003c\/h4\u003e\n\u003cp\u003eChoose the standard or pump-assisted option for the sampling task; the pump version should not be assumed to be included in every package.\u003c\/p\u003e\n\u003ch4\u003eAre the required gases included?\u003c\/h4\u003e\n\u003cp\u003eThe listed channel combination is O2 + H2S + CO + LEL. A different gas requirement needs a separate instrument\/configuration comparison.\u003c\/p\u003e\n\u003ch4\u003eWhat records and accessories are required?\u003c\/h4\u003e\n\u003cp\u003eCompare the listed alarm-record review and confirm the actual package for the selected variant.\u003c\/p\u003e\n\u003cp\u003eFor the buying comparison, read \u003ca href=\"\/blogs\/gas-detector\/portable-multi-gas-detector-selection-calibration\"\u003eportable multi-gas selection guide\u003c\/a\u003e and \u003ca href=\"\/blogs\/gas-detector\/4-gas-vs-5-gas-detector\"\u003efour-gas vs. five-gas comparison\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eCompare \u003ca href=\"\/products\/portable-pump-4-gas-monitor\"\u003eanother internal-pump four-gas listing\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eCompare a Dedicated Diffusion Model\u003c\/h3\u003e\u003cp\u003eThe \u003ca href=\"\/products\/portable-4-in-1-gas-detector\"\u003eportable four-gas diffusion monitor\u003c\/a\u003e lists a standard LEL + O2 + CO + H2S configuration without an internal pump. Compare it with the standard BH-4A option when diffusion fits the sampling plan. If a pump is needed, compare the specific BH-4A pump variant with the internal-pump model linked above.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe BH-4A is a portable 4 gas monitor for checking oxygen, hydrogen sulfide, carbon monoxide, and combustible gas levels. It is offered in standard and pump-assisted variants for field, maintenance, and facility monitoring tasks.\u003c\/p\u003e\n\u003ch3\u003eDetection Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMeasures O2, H2S, CO, and LEL combustible gas in one handheld instrument.\u003c\/li\u003e\n\u003cli\u003eAvailable as a standard BH-4A version or a BH-4A version with pump.\u003c\/li\u003e\n\u003cli\u003eSupports sound, light, vibration, and screen alarm indications.\u003c\/li\u003e\n\u003cli\u003eResponse time is specified as less than 30 seconds.\u003c\/li\u003e\n\u003cli\u003eStores alarm records for later review on the device.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDetails \u0026amp; Specs\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eBH-4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetected gases\u003c\/td\u003e\n\u003ctd\u003eO2, H2S, CO, combustible gas (LEL)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRanges\u003c\/td\u003e\n\u003ctd\u003eO2: 0-30% vol; CO: 0-999 ppm; H2S: 0-100 ppm; LEL: 0-100%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm modes\u003c\/td\u003e\n\u003ctd\u003eSound, light, vibration, screen display\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003e2.4 inch HD display\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eBuilt-in 3.7 V lithium battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRuntime\u003c\/td\u003e\n\u003ctd\u003e6-8 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e-20 Degree C to 50 Degree C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eUse Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSelect the pump variant when active sampling is needed for the intended inspection setup.\u003c\/li\u003e\n\u003cli\u003eUse the monitor according to the product manual and site safety procedures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 4-in-1 Multi-Gas Monitor\u003c\/li\u003e\n\u003cli\u003e1 x English User Manual\u003c\/li\u003e\n\u003cli\u003e1 x Charging Adapter\u003c\/li\u003e\n\u003cli\u003e1 x USB Charging Cable\u003c\/li\u003e\n\u003cli\u003e1 x Calibration Cover\u003c\/li\u003e\n\u003cli\u003e1 x Metal Aluminum Box\u003c\/li\u003e\n\u003cli\u003e1 x Certificate\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BOSEAN","offers":[{"title":"BH-4A with pump","offer_id":41082871152683,"sku":"INS03-8053","price":235.65,"currency_code":"USD","in_stock":true},{"title":"BH-4A","offer_id":41082871185451,"sku":"INS03-8054","price":173.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0273\/2133\/5851\/files\/ab42a72ed2f243ef2bd6efcc777a2541.jpg?v=1714471618"},{"product_id":"multi-gas-detector-o2-ex-h2s-co-bh-4s","title":"BH-4S Four-Gas Monitor — O2, EX, H2S and CO","description":"\u003cp\u003eThis BH-4S monitors the O2, EX, H2S and CO combination identified in its order option. It is the combustible-gas, oxygen, hydrogen-sulfide and carbon-monoxide member of the family, rather than the separate BH-4S O3\/SO2\/NO2\/CO2 configuration.\u003c\/p\u003e\n\u003ch2\u003eChoose the Configuration for Your Measurement\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExact order label:\u003c\/strong\u003e 4 Gas Detector O2 EX H2S CO, SKU INS03-8031.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombustible channel:\u003c\/strong\u003e The option label uses EX. Check the exact model's range, unit and calibration basis in its documentation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSampling package:\u003c\/strong\u003e Confirm the supplied sampling arrangement instead of inferring an internal pump from the family name.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOrder Options\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ccaption\u003eCurrent options for this product\u003c\/caption\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eSelect an option\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eSKU\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/multi-gas-detector-o2-ex-h2s-co-bh-4s?variant=41082871283755\"\u003e4 Gas Detector O2 EX H2S CO\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eINS03-8031\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eOpen an option to review its current price and purchase controls. Each option is a separate order configuration; use the selected product and SKU when confirming the supplied package.\u003c\/p\u003e\n\u003ch2\u003eProduct Details and Specifications\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDiscover the Portable 4-in-1 Gas Detector for precise monitoring of O2, EX, H2S, and CO. Features robust alarms, data storage, and IP65 protection, perfect for industrial and environmental safety.\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Haa1b78d4ec3a441388bb898b6042210ag.jpg\" alt=\"BH-4S multi-gas detector features and measurement ranges\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H88a6b0af33aa40f78af5f843be1bd18ew.jpg\" alt=\"BH-4S multi-gas detector package contents\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp align=\"center\" style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H973267dffb8840279050699f8e6d18227.jpg\" alt=\"BH-4S gas detector front and back views with four alarm modes\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Hdbc8833a85254bee8bca0a45ce7a0d4ee.jpg\" alt=\"BH-4S gas detector dimensions and operating parameters\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H2198f6c3473f4a8ba5316bd2998f267b2.jpg\" alt=\"BH-4S multi-gas detector carrying case and included accessories\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eCompare the Relevant Alternative\u003c\/h2\u003e\n\u003cp\u003eThe portable pump four-gas monitor explicitly describes an internal pump and lists LEL + O2 + CO + H2S. BH-4S names EX in its option and requires a model-specific sampling check. Compare those details rather than treating the channel-count labels as a complete specification.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/products\/portable-pump-4-gas-monitor\"\u003eView the comparison model and its options\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eQuestions Before Ordering\u003c\/h2\u003e\n\u003ch3\u003eDoes the BH-4S family name identify one sensor set?\u003c\/h3\u003e\n\u003cp\u003eNo. A separate BH-4S product lists O3, SO2, NO2 and CO2. The four gases in the current order label determine which configuration this page supplies.\u003c\/p\u003e\n\u003ch3\u003eHow should I choose pump or diffusion?\u003c\/h3\u003e\n\u003cp\u003eDecide whether the procedure requires sample drawing, then choose a product with that sampling arrangement explicitly stated. The linked guide explains the comparison; accessory inclusion still needs a package check.\u003c\/p\u003e\n\u003ch2\u003eSelection and Use Guides\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/gas-detector\/portable-multi-gas-detector-selection-calibration\"\u003eMulti-gas detector selection and maintenance\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/gas-detector\/pumped-vs-diffusion-gas-detector\"\u003ePumped vs diffusion gas detectors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/gas-detector\"\u003eBrowse gas detectors by gas and measurement task\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSelection note:\u003c\/strong\u003e Follow the supplied instrument instructions and the applicable site procedure. This product comparison does not replace a site-specific risk assessment.\u003c\/p\u003e\n","brand":"BOSEAN","offers":[{"title":"4 Gas Detector O2 EX H2S CO","offer_id":41082871283755,"sku":"INS03-8031","price":250.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0273\/2133\/5851\/files\/92f3054a72e8bf82d1a7e05e4291a3fd.jpg?v=1714471634"},{"product_id":"co-h2s-o2-lel-4-gas-meter-ht-1805","title":"Handheld 4 in 1 Gas Detector for CO, H2S, O2, and LEL Monitoring with Digital Display","description":"\u003ch2\u003eCompare the HT-1805 by Channel and Display\u003c\/h2\u003e\n\u003cp\u003eThe HT-1805 listing brings CO, H2S, oxygen and combustible-gas LEL readings into one handheld display. Compare it by the required channel combination and each channel’s units, rather than reading the product name as four interchangeable gas measurements.\u003c\/p\u003e\n\u003ch3\u003eListed Purchase Options\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eOption\u003c\/th\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHT-1805 four-gas option\u003c\/td\u003e\n\u003ctd\u003eINS03-8501\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp\u003eThis page lists one purchase option. Other ranges, pump packages or sensor combinations should not be assumed to be selectable variants of this SKU.\u003c\/p\u003e\n\u003ch3\u003eQuestions That Help You Choose\u003c\/h3\u003e\n\u003ch4\u003eWhat do the four readings represent?\u003c\/h4\u003e\n\u003cp\u003eCO and H2S concentrations, oxygen concentration and a combustible-gas LEL reading use different scales; compare each against the measurement task.\u003c\/p\u003e\n\u003ch4\u003eDo I need a specified pump arrangement?\u003c\/h4\u003e\n\u003cp\u003eThis page does not state the sampling configuration. Compare a model with an explicitly listed pump if that is a required purchase feature.\u003c\/p\u003e\n\u003ch4\u003eWhich indication functions matter?\u003c\/h4\u003e\n\u003cp\u003eCompare the listed display and adjustable alarm indications. Ask for the supplied model’s sampling and recording details if they are buying requirements.\u003c\/p\u003e\n\u003cp\u003eFor the buying comparison, read \u003ca href=\"\/blogs\/gas-detector\/portable-multi-gas-detector-selection-calibration\"\u003eportable multi-gas selection guide\u003c\/a\u003e and \u003ca href=\"\/blogs\/gas-detector\/single-gas-vs-multi-gas-detector\"\u003esingle-gas vs. multi-gas comparison\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eCompare \u003ca href=\"\/products\/portable-pump-4-gas-monitor\"\u003efour-gas listing with an internal pump\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eCompare the Sampling Configuration Before Choosing\u003c\/h3\u003e\u003cp\u003eThe \u003ca href=\"\/products\/4-in-1-multi-gas-detector-o2-h2s-co-lel-meter\"\u003eBH-4A four-gas monitor\u003c\/a\u003e separates its standard and pump-assisted versions. The \u003ca href=\"\/products\/portable-4-in-1-gas-detector\"\u003eportable diffusion four-gas monitor\u003c\/a\u003e explicitly lists diffusion sampling. Use these alternatives to compare a specified sampling arrangement against this HT-1805 listing, where the sampling method is not identified.\u003c\/p\u003e\u003cp\u003eStart the comparison with the actual measurement plan: which gases must be read, how the sample reaches the sensors, and which results need to remain visible during the work? A four-channel label answers the gas-combination question but does not by itself answer the pump or sample-access question. The existing model pages describe different configurations, so compare the selected package rather than transferring a feature from one model to another.\u003c\/p\u003e\u003cp\u003eFor this HT-1805 option, ask for the sampling configuration and any required accessories before ordering if those points determine the purchase. Compare the display and alarm functions listed on this page with your recording requirements. Do not assume that a pump, a data-download function or a different sensor combination belongs to this SKU merely because it appears on an alternative model.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e4 in 1 gas detector is a versatile and portable digital device designed to monitor toxic gases like carbon monoxide (CO), hydrogen sulfide (H2S), oxygen (O2), and lower explosive limit (LEL) levels. With a high-resolution display, it provides accurate measurements for various gases:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eO2 measurement range: 0~30%, resolution: 0.1%\u003c\/li\u003e\n\u003cli\u003eCO measurement range: 0~999PPM, resolution: 1PPM\u003c\/li\u003e\n\u003cli\u003eH2S measurement range: 0~100PPM, resolution: 1PPM\u003c\/li\u003e\n\u003cli\u003eLEL measurement range: 0~100%, resolution: 1%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe device features an adjustable alarm system with flash, vibration, and buzzer alerts, ensuring safety in diverse environments such as mines, metallurgical plants, petrochemical facilities, power stations, and municipal areas. It operates efficiently in temperatures ranging from -10℃ to 50℃ and humidity levels from 15% to 90% RH (non-condensing). Powered by a built-in 3.7V lithium battery, this gas detector is reliable and easy to use, making it essential for maintaining air quality and safety.\u003c\/p\u003e","brand":"Mcooh","offers":[{"title":"Default Title","offer_id":41101799653419,"sku":"INS03-8501","price":325.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0273\/2133\/5851\/files\/154A96B0546F1FFB.jpg?v=1716948848"},{"product_id":"portable-4-in-1-gas-detector","title":"Portable 4 Gas Monitor - LEL, O2, CO \u0026 H2S Gas Detection","description":"\u003ch2\u003eChoose the Standard Four-Gas Diffusion Configuration\u003c\/h2\u003e\n\u003cp\u003eThis portable monitor’s standard online combination is combustible gas on a LEL scale, oxygen, carbon monoxide and hydrogen sulfide. It uses diffusion sampling. Compare that combination with the gases required by the task before choosing an alternative sensor package: the extended gas table below lists custom options, not all gases installed in one standard unit.\u003c\/p\u003e\n\u003ch3\u003eListed Purchase Options\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eOption\u003c\/th\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eLEL + O2 + CO + H2S\u003c\/td\u003e\n\u003ctd\u003eGAS-TU7K-01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp\u003eThis online option is the listed LEL + O2 + CO + H2S combination. The additional sensor choices below are not extra channels included with this SKU.\u003c\/p\u003e\n\u003ch3\u003eQuestions That Help You Choose\u003c\/h3\u003e\n\u003ch4\u003eAre these the four channels I need?\u003c\/h4\u003e\n\u003cp\u003eThe standard configuration is LEL + O2 + CO + H2S. Another sensor combination is a separate configuration question, not an extra standard online channel.\u003c\/p\u003e\n\u003ch4\u003eDoes diffusion fit the sampling plan?\u003c\/h4\u003e\n\u003cp\u003eThis model has no internal pump. Compare the pump model when active sampling is needed.\u003c\/p\u003e\n\u003ch4\u003eWhat should a custom request specify?\u003c\/h4\u003e\n\u003cp\u003eList the required gases and ranges together. Custom sensor choices are not the same as selecting a listed standard unit.\u003c\/p\u003e\n\u003cp\u003eFor the buying comparison, read \u003ca href=\"\/blogs\/gas-detector\/portable-multi-gas-detector-selection-calibration\"\u003eportable multi-gas selection guide\u003c\/a\u003e and \u003ca href=\"\/blogs\/gas-detector\/4-gas-vs-5-gas-detector\"\u003efour-gas vs. five-gas comparison\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eCompare \u003ca href=\"\/products\/portable-pump-4-gas-monitor\"\u003einternal-pump four-gas option\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eCompare Standard and Pump-Assisted Purchase Options\u003c\/h3\u003e\u003cp\u003eThe \u003ca href=\"\/products\/4-in-1-multi-gas-detector-o2-h2s-co-lel-meter\"\u003eBH-4A four-gas monitor\u003c\/a\u003e lists standard and pump-assisted variants as separate choices. This page lists the diffusion configuration. Compare those purchase options when a pump is part of the task, while keeping the required O2, H2S, CO and LEL channels as the basis for the comparison.\u003c\/p\u003e\n\n\u003cp\u003eThe portable 4 gas monitor simultaneously checks combustible gas (LEL), oxygen (O2), carbon monoxide (CO), and hydrogen sulfide (H2S) through diffusion sampling. The four readings appear together on the LCD, making the instrument suitable for field and facility checks where these common atmospheric hazards must be monitored.\u003c\/p\u003e\n\u003ch3\u003eStandard Configuration and Custom Gas Options\u003c\/h3\u003e\n\u003cp\u003eThe standard online configuration is LEL + O2 + CO + H2S. The Gas Monitor can also be customized with the additional supported gas sensors listed below. Custom configurations are not standard online variants; contact us before ordering to confirm the required gas combination, measuring range, sensor availability, and quotation.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eGas\u003c\/th\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003cth\u003eAccuracy\u003c\/th\u003e\n\u003cth\u003eMinimum Reading\u003c\/th\u003e\n\u003cth\u003eSensor Response Limit\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustible Gas (LEL)\u003c\/td\u003e\n\u003ctd\u003e0-100% LEL\u003c\/td\u003e\n\u003ctd\u003e≤±5% F.S.\u003c\/td\u003e\n\u003ctd\u003e1% LEL\u003c\/td\u003e\n\u003ctd\u003e≤15 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOxygen (O2)\u003c\/td\u003e\n\u003ctd\u003e0-30% vol\u003c\/td\u003e\n\u003ctd\u003e≤±5% F.S.\u003c\/td\u003e\n\u003ctd\u003e0.1% vol\u003c\/td\u003e\n\u003ctd\u003e≤20 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Monoxide (CO)\u003c\/td\u003e\n\u003ctd\u003e0-1000 ppm\u003c\/td\u003e\n\u003ctd\u003e≤±5% F.S.\u003c\/td\u003e\n\u003ctd\u003e1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤25 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydrogen Sulfide (H2S)\u003c\/td\u003e\n\u003ctd\u003e0-100 ppm\u003c\/td\u003e\n\u003ctd\u003e≤±5% F.S.\u003c\/td\u003e\n\u003ctd\u003e1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤30 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSulfur Dioxide (SO2)\u003c\/td\u003e\n\u003ctd\u003e0-100 ppm\u003c\/td\u003e\n\u003ctd\u003e≤±5% F.S.\u003c\/td\u003e\n\u003ctd\u003e0.1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤30 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitric Oxide (NO)\u003c\/td\u003e\n\u003ctd\u003e0-250 ppm\u003c\/td\u003e\n\u003ctd\u003e≤±5% F.S.\u003c\/td\u003e\n\u003ctd\u003e1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤60 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrogen Dioxide (NO2)\u003c\/td\u003e\n\u003ctd\u003e0-20 ppm\u003c\/td\u003e\n\u003ctd\u003e≤±5% F.S.\u003c\/td\u003e\n\u003ctd\u003e0.1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤25 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChlorine (Cl2)\u003c\/td\u003e\n\u003ctd\u003e0-20 ppm\u003c\/td\u003e\n\u003ctd\u003e≤±5% F.S.\u003c\/td\u003e\n\u003ctd\u003e0.1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤30 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmmonia (NH3)\u003c\/td\u003e\n\u003ctd\u003e0-100 ppm\u003c\/td\u003e\n\u003ctd\u003e≤±5% F.S.\u003c\/td\u003e\n\u003ctd\u003e1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤50 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydrogen (H2)\u003c\/td\u003e\n\u003ctd\u003e0-1000 ppm\u003c\/td\u003e\n\u003ctd\u003e≤±5% F.S.\u003c\/td\u003e\n\u003ctd\u003e1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤60 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydrogen Cyanide (HCN)\u003c\/td\u003e\n\u003ctd\u003e0-50 ppm\u003c\/td\u003e\n\u003ctd\u003e≤±5% F.S.\u003c\/td\u003e\n\u003ctd\u003e0.1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤200 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydrogen Chloride (HCl)\u003c\/td\u003e\n\u003ctd\u003e0-30 ppm\u003c\/td\u003e\n\u003ctd\u003e≤±5% F.S.\u003c\/td\u003e\n\u003ctd\u003e0.1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤60 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhosphine (PH3)\u003c\/td\u003e\n\u003ctd\u003e0-1000 ppm\u003c\/td\u003e\n\u003ctd\u003e≤±5% F.S.\u003c\/td\u003e\n\u003ctd\u003e0.1\/1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤25 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOzone (O3)\u003c\/td\u003e\n\u003ctd\u003e0-20 ppm\u003c\/td\u003e\n\u003ctd\u003e≤±5% F.S.\u003c\/td\u003e\n\u003ctd\u003e0.1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤50 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eAlarm and Display Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAudible, visual, and vibration alarms with sound pressure above 90 dB\u003c\/li\u003e\n\u003cli\u003eLCD shows gas concentration, gas type, unit, battery level, and time\u003c\/li\u003e\n\u003cli\u003eChinese and English interface options\u003c\/li\u003e\n\u003cli\u003eppm and mg\/m³ unit switching where applicable\u003c\/li\u003e\n\u003cli\u003eDiffusion sampling without an internal pump\u003c\/li\u003e\n\u003cli\u003eIntegrated back clip for portable use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; height: 333.095px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eStandard gas configuration\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003eLEL + O2 + CO + H2S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eCustom gas options\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003eAvailable by inquiry; see the supported gas table above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eSampling method\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003eDiffusion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eLinear accuracy\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003e≤±5% F.S.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eGeneral response time\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003e\u0026lt;10 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eAlarm modes\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003eAudible, visual, and vibration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eAlarm sound pressure\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003e\u0026gt;90 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eDisplay\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003eLCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003ePower\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003e3.7 V rechargeable lithium-ion battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eStandby time\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003eAt least 30 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eUse time\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003eAt least 24 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eOperating temperature\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003e-35 to 65 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eOperating humidity\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003e10-95% RH, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eDimensions\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003e146 x 71 x 42 mm (H x W x D)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eApproximate weight\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003e0.25 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eHousing \/ ingress protection\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003eABS \/ IP66\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 34.5787%; height: 19.5938px;\"\u003eExplosion protection\u003c\/th\u003e\n\u003ctd style=\"width: 62.5641%; height: 19.5938px;\"\u003eEx ib IIC T4 Gb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eUse Notes\u003c\/h3\u003e\n\u003cp\u003eBecause the gas detector uses diffusion sampling, the surrounding atmosphere must reach the sensor openings. Alarm settings, calibration, bump testing, and operating checks should follow the supplied sensor documentation and the workplace safety procedure.\u003c\/p\u003e","brand":"Yibang","offers":[{"title":"LEL + O2 + CO + H2S","offer_id":44538887471147,"sku":"GAS-TU7K-01","price":647.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0273\/2133\/5851\/files\/bx400-portable-4-gas-monitor-front.png?v=1785470607"},{"product_id":"portable-pump-4-gas-monitor","title":"Portable Pump 4 Gas Monitor with Color LCD","description":"\u003ch2\u003eCompare the Pumped Four-Gas Package\u003c\/h2\u003e\n\u003cp\u003eThis four-gas listing combines internal pump sampling with a color LCD and the standard LEL, O2, CO and H2S channels. Compare it when the sample-drawing arrangement and pump-status display are part of the purchase decision. Other sensor combinations shown below require a separately confirmed configuration.\u003c\/p\u003e\n\u003ch3\u003eListed Purchase Options\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eOption\u003c\/th\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eLEL + O2 + CO + H2S\u003c\/td\u003e\n\u003ctd\u003eGAS-R4K8-01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp\u003eThis online option is the listed LEL + O2 + CO + H2S combination. The additional sensor choices below are not extra channels included with this SKU.\u003c\/p\u003e\n\u003ch3\u003eQuestions That Help You Choose\u003c\/h3\u003e\n\u003ch4\u003eIs the standard gas combination suitable?\u003c\/h4\u003e\n\u003cp\u003eStart with the listed LEL + O2 + CO + H2S configuration. Do not treat every gas in the sensor-options table as an installed channel.\u003c\/p\u003e\n\u003ch4\u003eWhat distinguishes it from the diffusion model?\u003c\/h4\u003e\n\u003cp\u003eThis listing includes an internal micro pump and displays pump status. Compare the diffusion model when an internal pump is not required by the plan.\u003c\/p\u003e\n\u003ch4\u003eWhat belongs in the package comparison?\u003c\/h4\u003e\n\u003cp\u003eCheck the configured sensors, any required sampling accessories and the charging arrangement against the proposed package.\u003c\/p\u003e\n\u003cp\u003eFor the buying comparison, read \u003ca href=\"\/blogs\/gas-detector\/portable-multi-gas-detector-selection-calibration\"\u003eportable multi-gas selection guide\u003c\/a\u003e and \u003ca href=\"\/blogs\/gas-detector\/pumped-vs-diffusion-gas-detector\"\u003epump vs. diffusion selection\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eCompare \u003ca href=\"\/products\/portable-4-in-1-gas-detector\"\u003efour-gas diffusion option\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eCompare a Model with Separate Pump Variants\u003c\/h3\u003e\u003cp\u003eThe \u003ca href=\"\/products\/4-in-1-multi-gas-detector-o2-h2s-co-lel-meter\"\u003eBH-4A product page\u003c\/a\u003e offers standard and pump-assisted variants. This listing describes an internal micro pump and a color LCD. Compare the supplied pump arrangement, required channel combination and display information across the chosen variants instead of assuming the two packages have identical functions.\u003c\/p\u003e\n\n\u003cp\u003eThis portable pump 4 gas monitor draws air through a built-in micro sampling pump and simultaneously displays combustible gas (LEL), oxygen (O2), carbon monoxide (CO), and hydrogen sulfide (H2S) readings on one color LCD. It is suited to field and facility checks where active sampling is preferred over relying only on natural diffusion.\u003c\/p\u003e\n\u003ch3\u003eFour-Gas Pump Sampling\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStandard LEL + O2 + CO + H2S detection configuration\u003c\/li\u003e\n\u003cli\u003eBuilt-in micro sampling pump with 10 selectable suction levels\u003c\/li\u003e\n\u003cli\u003eColor LCD displays gas name, concentration, unit, time, alarm status, pump status, and battery level\u003c\/li\u003e\n\u003cli\u003eChinese and English interface options\u003c\/li\u003e\n\u003cli\u003eAudible, visual, and vibration alarms with sound pressure above 90 dB\u003c\/li\u003e\n\u003cli\u003eTop flashlight, large back clip, and magnetic charging connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSupported Sensor Options\u003c\/h3\u003e\n\u003cp\u003eThe standard purchasable configuration combines LEL, O2, CO, and H2S sensors. Other four-sensor combinations can be customized from the supported options below; contact us to confirm the required gases and measuring ranges.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eGas\u003c\/th\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003cth\u003eMinimum Reading\u003c\/th\u003e\n\u003cth\u003eSensor Response Limit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustible Gas (LEL)\u003c\/td\u003e\n\u003ctd\u003e0-100% LEL\u003c\/td\u003e\n\u003ctd\u003e1% LEL\u003c\/td\u003e\n\u003ctd\u003e≤15 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOxygen (O2)\u003c\/td\u003e\n\u003ctd\u003e0-30% vol\u003c\/td\u003e\n\u003ctd\u003e0.1% vol\u003c\/td\u003e\n\u003ctd\u003e≤20 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Monoxide (CO)\u003c\/td\u003e\n\u003ctd\u003e0-1000 ppm\u003c\/td\u003e\n\u003ctd\u003e1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤25 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydrogen Sulfide (H2S)\u003c\/td\u003e\n\u003ctd\u003e0-100 ppm\u003c\/td\u003e\n\u003ctd\u003e1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤30 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSulfur Dioxide (SO2)\u003c\/td\u003e\n\u003ctd\u003e0-100 ppm\u003c\/td\u003e\n\u003ctd\u003e0.1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤30 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitric Oxide (NO)\u003c\/td\u003e\n\u003ctd\u003e0-250 ppm\u003c\/td\u003e\n\u003ctd\u003e1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤60 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrogen Dioxide (NO2)\u003c\/td\u003e\n\u003ctd\u003e0-20 ppm\u003c\/td\u003e\n\u003ctd\u003e0.1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤25 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChlorine (Cl2)\u003c\/td\u003e\n\u003ctd\u003e0-20 ppm\u003c\/td\u003e\n\u003ctd\u003e0.1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤30 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmmonia (NH3)\u003c\/td\u003e\n\u003ctd\u003e0-100 ppm\u003c\/td\u003e\n\u003ctd\u003e1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤50 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydrogen (H2)\u003c\/td\u003e\n\u003ctd\u003e0-1000 ppm\u003c\/td\u003e\n\u003ctd\u003e1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤60 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydrogen Cyanide (HCN)\u003c\/td\u003e\n\u003ctd\u003e0-50 ppm\u003c\/td\u003e\n\u003ctd\u003e0.1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤200 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydrogen Chloride (HCl)\u003c\/td\u003e\n\u003ctd\u003e0-30 ppm\u003c\/td\u003e\n\u003ctd\u003e0.1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤60 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhosphine (PH3)\u003c\/td\u003e\n\u003ctd\u003e0-1000 ppm\u003c\/td\u003e\n\u003ctd\u003e0.1\/1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤25 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOzone (O3)\u003c\/td\u003e\n\u003ctd\u003e0-20 ppm\u003c\/td\u003e\n\u003ctd\u003e0.1 ppm\u003c\/td\u003e\n\u003ctd\u003e≤50 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstrument Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSampling method\u003c\/th\u003e\n\u003ctd\u003eInternal micro pump with 10 suction levels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStandard gas configuration\u003c\/th\u003e\n\u003ctd\u003eLEL + O2 + CO + H2S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLinear accuracy\u003c\/th\u003e\n\u003ctd\u003e\u0026lt;±5% F.S.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGeneral response time\u003c\/th\u003e\n\u003ctd\u003e\u0026lt;10 s; gas-specific sensor response limits vary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlarm modes\u003c\/th\u003e\n\u003ctd\u003eAudible, visual, and vibration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlarm sound pressure\u003c\/th\u003e\n\u003ctd\u003e\u0026gt;90 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eColor LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e3.7 V rechargeable lithium-ion battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCharging\u003c\/th\u003e\n\u003ctd\u003eMagnetic charging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStandby time\u003c\/th\u003e\n\u003ctd\u003eAt least 30 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUse time\u003c\/th\u003e\n\u003ctd\u003eAt least 24 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating temperature\u003c\/th\u003e\n\u003ctd\u003e-35 to 65 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating humidity\u003c\/th\u003e\n\u003ctd\u003e5-95% RH, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e210 x 73 x 50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApproximate weight\u003c\/th\u003e\n\u003ctd\u003e0.4 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHousing \/ ingress protection\u003c\/th\u003e\n\u003ctd\u003eABS \/ IP66\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExplosion-protection marking\u003c\/th\u003e\n\u003ctd\u003eEx ib IIC T4 Gb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSelection Notes\u003c\/h3\u003e\n\u003cp\u003eThe standard configuration covers four common atmospheric hazards in one instrument. For another four-gas combination, contact us with the required gases and measuring ranges. Alarm settings, calibration, bump testing, and operating checks should follow the configured sensor documentation and the workplace safety procedure.\u003c\/p\u003e","brand":"Yibang","offers":[{"title":"LEL + O2 + CO + H2S","offer_id":44561919115307,"sku":"GAS-R4K8-01","price":676.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0273\/2133\/5851\/files\/portable-pump-4-gas-monitor-front.png?v=1785633727"},{"product_id":"portable-4-gas-monitor-mh-1200h-s4","title":"Portable 4 Gas Monitor - CO, H2S, O2 and LEL","description":"\u003cp\u003eThis portable 4 gas monitor combines carbon monoxide, hydrogen sulfide, oxygen and combustible gas measurement in one instrument. The MH-1200H-S4 uses diffusion sampling, with electrochemical sensors for CO, H2S and O2 and a catalytic combustion sensor for the LEL channel. It provides the four readings through a monochrome LCD and uses sound, light and vibration for alarm indication.\u003c\/p\u003e\u003ch3\u003eFour Gas Channels in One Configuration\u003c\/h3\u003e\u003cp\u003eThe instrument is supplied as one four-channel configuration. Each gas has its own measurement span and concentration unit:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eGas channel\u003c\/th\u003e\n\u003cth\u003eMeasurement range\u003c\/th\u003e\n\u003cth\u003eSensor principle\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon monoxide (CO)\u003c\/td\u003e\n\u003ctd\u003e0-1000 ppm\u003c\/td\u003e\n\u003ctd\u003eElectrochemical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydrogen sulfide (H2S)\u003c\/td\u003e\n\u003ctd\u003e0-100 ppm\u003c\/td\u003e\n\u003ctd\u003eElectrochemical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOxygen (O2)\u003c\/td\u003e\n\u003ctd\u003e0-30% Vol\u003c\/td\u003e\n\u003ctd\u003eElectrochemical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustible gas (LEL)\u003c\/td\u003e\n\u003ctd\u003e0-100% LEL\u003c\/td\u003e\n\u003ctd\u003eCatalytic combustion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eUse these channel ranges when comparing the monitor with the requirements of your monitoring procedure. CO and H2S are measured in ppm, oxygen in percent by volume and combustible gas in percent LEL. Diffusion sampling measures air at the instrument inlet. Keep the inlet exposed to the air being checked and follow the instrument instructions for calibration and pre-use checks.\u003c\/p\u003e\u003ch3\u003eAlarm Settings and Event Review\u003c\/h3\u003e\u003cp\u003eThe audible alarm is rated at 85 dB, with light and vibration providing additional indications. Alarm set points can be configured for the monitoring procedure. The detector stores 100 alarm records that can be reviewed on the instrument. The 128 x 64 monochrome LCD supports English and Chinese interfaces; backlight timing can be adjusted, and the backlight turns on automatically during an alarm.\u003c\/p\u003e\u003ch3\u003eInstrument Specifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eMH-1200H-S4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGas configuration\u003c\/th\u003e\n\u003ctd\u003eCO, H2S, O2 and combustible gas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSampling\u003c\/th\u003e\n\u003ctd\u003eDiffusion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003e128 x 64 monochrome LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInterface languages\u003c\/th\u003e\n\u003ctd\u003eEnglish and Chinese\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlarm modes\u003c\/th\u003e\n\u003ctd\u003eSound, light and vibration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAudible alarm\u003c\/th\u003e\n\u003ctd\u003e85 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlarm settings\u003c\/th\u003e\n\u003ctd\u003eConfigurable set points\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlarm history\u003c\/th\u003e\n\u003ctd\u003e100 records viewable on the instrument\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBacklight\u003c\/th\u003e\n\u003ctd\u003eAdjustable timing; automatic illumination during an alarm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBattery\u003c\/th\u003e\n\u003ctd\u003e2300 mAh rechargeable lithium-polymer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating temperature\u003c\/th\u003e\n\u003ctd\u003e-20 to 50 Degree C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIngress protection\u003c\/th\u003e\n\u003ctd\u003eIP65\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e131 x 83 x 35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApproximate instrument weight\u003c\/th\u003e\n\u003ctd\u003e240 g including protective cover\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eControls and Carrying Details\u003c\/h3\u003e\u003cp\u003eZero calibration, self-calibration, battery status checks and a factory reset function are available through the instrument controls. A rechargeable 2300 mAh lithium-polymer battery powers the monitor. The housing measures 131 x 83 x 35 mm, and the instrument weighs approximately 240 g including its protective cover. A rear clip provides a carrying point during inspection rounds.\u003c\/p\u003e\u003cp\u003eFollow the instrument instructions and your monitoring procedure for setup, calibration, checks and alarm handling. Product photos illustrate the housing shared across this series; gas names on the demonstration screen may differ from the selected configuration.\u003c\/p\u003e","brand":"Mcooh","offers":[{"title":"CO \/ H2S \/ O2 \/ LEL","offer_id":67791637315627,"sku":"GAS-F4P8-01","price":418.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0273\/2133\/5851\/files\/portable-4-gas-monitor-front.jpg?v=1791450793"},{"product_id":"pump-4-gas-detector-mh2000-m4","title":"4 Gas Detector with Internal Pump - CO, H2S, O2 and LEL","description":"\u003cp\u003eA 4 gas detector with an internal pump brings CO, H2S, oxygen and combustible gas measurement together in the MH2000-M4. The pump draws air into the instrument for measurement, and its suction has ten adjustable levels. This configuration provides all four gas channels in one handheld unit, with concentration readings on a dot-matrix LCD and two-stage sound and light alarms.\u003c\/p\u003e\u003ch3\u003ePumped Sampling and Daily Controls\u003c\/h3\u003e\u003cp\u003eThe sampling pump has a maximum flow of 1 L\/min. The LCD shows the gas type, concentration, measurement unit, time and battery status; English and Chinese interfaces are available. Temperature and pressure compensation are built into the measurement functions.\u003c\/p\u003e\u003cp\u003eSelf-calibration, zero calibration and a factory reset are available through the instrument controls. Alarm set points can be adjusted for the monitoring procedure. Use the instrument instructions for calibration, checks and alarm handling; this monitor is one part of a workplace gas-monitoring procedure.\u003c\/p\u003e\u003ch3\u003eCO, H2S, Oxygen and LEL Channels\u003c\/h3\u003e\u003cp\u003eThree electrochemical channels measure CO, H2S and O2, while the combustible gas channel uses catalytic combustion. This is one complete four-gas configuration:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eGas channel\u003c\/th\u003e\n\u003cth\u003eMeasurement range\u003c\/th\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003cth\u003eSensor principle\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon monoxide (CO)\u003c\/td\u003e\n\u003ctd\u003e0-1000 ppm\u003c\/td\u003e\n\u003ctd\u003e1 ppm\u003c\/td\u003e\n\u003ctd\u003eElectrochemical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydrogen sulfide (H2S)\u003c\/td\u003e\n\u003ctd\u003e0-100 ppm\u003c\/td\u003e\n\u003ctd\u003e0.1 ppm\u003c\/td\u003e\n\u003ctd\u003eElectrochemical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOxygen (O2)\u003c\/td\u003e\n\u003ctd\u003e0-30% Vol\u003c\/td\u003e\n\u003ctd\u003e0.01% Vol\u003c\/td\u003e\n\u003ctd\u003eElectrochemical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustible gas (LEL)\u003c\/td\u003e\n\u003ctd\u003e0-100% LEL\u003c\/td\u003e\n\u003ctd\u003e1% LEL\u003c\/td\u003e\n\u003ctd\u003eCatalytic combustion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eCO and H2S readings use ppm, oxygen uses percent by volume, and combustible gas uses percent LEL. These units describe different measurements. Compare the channel spans with the gases and ranges required for your task when selecting the instrument.\u003c\/p\u003e\u003ch3\u003eInstrument Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eItem\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eMH2000-M4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConfiguration\u003c\/td\u003e\n\u003ctd\u003eCO \/ H2S \/ O2 \/ LEL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSampling method\u003c\/td\u003e\n\u003ctd\u003eInternal sampling pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum pump flow\u003c\/td\u003e\n\u003ctd\u003eUp to 1 L\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePump control\u003c\/td\u003e\n\u003ctd\u003e10 adjustable suction levels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eLCD dot-matrix display\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplayed information\u003c\/td\u003e\n\u003ctd\u003eGas type, concentration, unit, time and battery status\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface languages\u003c\/td\u003e\n\u003ctd\u003eEnglish and Chinese\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm indication\u003c\/td\u003e\n\u003ctd\u003eSound and light\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm settings\u003c\/td\u003e\n\u003ctd\u003eTwo stages with adjustable set points\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConcentration compensation\u003c\/td\u003e\n\u003ctd\u003eTemperature and pressure compensation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration controls\u003c\/td\u003e\n\u003ctd\u003eSelf-calibration and zero calibration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReset control\u003c\/td\u003e\n\u003ctd\u003eRestore factory settings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e2300 mAh rechargeable lithium-polymer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e-20 to 50 Degree C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating humidity\u003c\/td\u003e\n\u003ctd\u003e0-95% RH, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIngress protection\u003c\/td\u003e\n\u003ctd\u003eIP65\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing\u003c\/td\u003e\n\u003ctd\u003eEngineering plastic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e205 x 75 x 32 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eIncluded Items and Selection Notes\u003c\/h3\u003e\u003cp\u003eThe package includes the detector, a charging\/data cable, an instruction manual and an aluminum carrying case. The instrument uses a rechargeable lithium-polymer battery and measures 205 x 75 x 32 mm. Its engineering-plastic housing is rated IP65.\u003c\/p\u003e\u003cp\u003eChoose this model when your procedure calls for a pump to bring a sample into the detector. The four quoted gas channels are fixed for this configuration. Product photographs illustrate the series housing; demonstration screen readings and gas labels may differ from the supplied configuration.\u003c\/p\u003e","brand":"Mcooh","offers":[{"title":"CO \/ H2S \/ O2 \/ LEL","offer_id":67800281317419,"sku":"GAS-P4N7-01","price":621.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0273\/2133\/5851\/files\/4-gas-detector-pump-angle.jpg?v=1791531751"}],"url":"https:\/\/mcooh.com\/collections\/portable-4-gas-detectors.oembed","provider":"Mcooh","version":"1.0","type":"link"}