Handheld 4 in 1 Gas Detector for CO, H2S, O2, and LEL Monitoring with Digital Display
Compare the HT-1805 by Channel and Display
The 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.
Listed Purchase Options
| Option | SKU |
|---|---|
| HT-1805 four-gas option | INS03-8501 |
This page lists one purchase option. Other ranges, pump packages or sensor combinations should not be assumed to be selectable variants of this SKU.
Questions That Help You Choose
What do the four readings represent?
CO and H2S concentrations, oxygen concentration and a combustible-gas LEL reading use different scales; compare each against the measurement task.
Do I need a specified pump arrangement?
This page does not state the sampling configuration. Compare a model with an explicitly listed pump if that is a required purchase feature.
Which indication functions matter?
Compare the listed display and adjustable alarm indications. Ask for the supplied model’s sampling and recording details if they are buying requirements.
For the buying comparison, read portable multi-gas selection guide and single-gas vs. multi-gas comparison.
Compare four-gas listing with an internal pump.
Compare the Sampling Configuration Before Choosing
The BH-4A four-gas monitor separates its standard and pump-assisted versions. The portable diffusion four-gas monitor 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.
Start 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.
For 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.
Description
4 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:
- O2 measurement range: 0~30%, resolution: 0.1%
- CO measurement range: 0~999PPM, resolution: 1PPM
- H2S measurement range: 0~100PPM, resolution: 1PPM
- LEL measurement range: 0~100%, resolution: 1%
The 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.
Free Shipping
Free shipping is available on all orders. Shipping methods and carriers may vary depending on the destination, order details, and available logistics options. Full Shipping Policy
Returns Policy
For returns and refunds, please review our full Refund Policy before placing an order. If you need help with an order, contact us before your order has shipped whenever possible. Full Returns Policy
When Will My Order Ship?
For Standard Shipping, we aim to pack and ship out your order within 4 business days. During special periods, such as heavy order processing or local inventory shortages that require deployment, please expect it to take an additional day or two for processing. We ship five days a week, Monday through Friday.
You will receive a shipment confirmation with tracking information via email when your order has shipped. Once you receive this email, we cannot change or cancel your order.
Can I Change The Shipping Address On My Order?
Please contact us immediately via email if you realize that you gave us the wrong shipping address — if it hasn't shipped yet, we might be able to correct it before it goes out the door.If your order ships to the address provided and is returned to us as undeliverable, then you are responsible for paying the cost of shipping again to resend it to you. If you decide you do not want your order reshipped, we'll refund you for the products less the original shipping charges, once your order returns to our warehouse. We'll reach out to you to coordinate your options before re-shipping.
If your order ships to an incorrect address provided at the time the order is placed and is not retrievable, we are not responsible and cannot offer reimbursement.
Unable to find satisfactory answers ? more FAQs
Let customers speak for us
My first impression after opening and installing batteries was that this meter is very well built considering the price and manufacturer. I had read some reviews stating that it's amp measurements were not accurate below 5 amps, I haven't seen any issues in any measurements I've taken, even side by side with my fluke meters. I've successfully taken accurate amp, voltage and continuity measurements with this ETCR6920B, the display is nice and legible. I haven't tried storing data and making transfers to a PC yet, the soft case is good enough for storage on a shelf and the test leads are of good quality and rated for 1000v. There's nothing bad to say about this meter especially when you consider the price, it's a really great meter.
Works as described.
