Compare the Pumped Four-Gas Package
This 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.
Listed Purchase Options
| Option | SKU |
|---|---|
| LEL + O2 + CO + H2S | GAS-R4K8-01 |
This online option is the listed LEL + O2 + CO + H2S combination. The additional sensor choices below are not extra channels included with this SKU.
Questions That Help You Choose
Is the standard gas combination suitable?
Start with the listed LEL + O2 + CO + H2S configuration. Do not treat every gas in the sensor-options table as an installed channel.
What distinguishes it from the diffusion model?
This listing includes an internal micro pump and displays pump status. Compare the diffusion model when an internal pump is not required by the plan.
What belongs in the package comparison?
Check the configured sensors, any required sampling accessories and the charging arrangement against the proposed package.
For the buying comparison, read portable multi-gas selection guide and pump vs. diffusion selection.
Compare four-gas diffusion option.
Compare a Model with Separate Pump Variants
The BH-4A product page 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.
This 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.
Four-Gas Pump Sampling
- Standard LEL + O2 + CO + H2S detection configuration
- Built-in micro sampling pump with 10 selectable suction levels
- Color LCD displays gas name, concentration, unit, time, alarm status, pump status, and battery level
- Chinese and English interface options
- Audible, visual, and vibration alarms with sound pressure above 90 dB
- Top flashlight, large back clip, and magnetic charging connection
Supported Sensor Options
The 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.
| Gas | Range | Minimum Reading | Sensor Response Limit |
|---|---|---|---|
| Combustible Gas (LEL) | 0-100% LEL | 1% LEL | ≤15 s |
| Oxygen (O2) | 0-30% vol | 0.1% vol | ≤20 s |
| Carbon Monoxide (CO) | 0-1000 ppm | 1 ppm | ≤25 s |
| Hydrogen Sulfide (H2S) | 0-100 ppm | 1 ppm | ≤30 s |
| Sulfur Dioxide (SO2) | 0-100 ppm | 0.1 ppm | ≤30 s |
| Nitric Oxide (NO) | 0-250 ppm | 1 ppm | ≤60 s |
| Nitrogen Dioxide (NO2) | 0-20 ppm | 0.1 ppm | ≤25 s |
| Chlorine (Cl2) | 0-20 ppm | 0.1 ppm | ≤30 s |
| Ammonia (NH3) | 0-100 ppm | 1 ppm | ≤50 s |
| Hydrogen (H2) | 0-1000 ppm | 1 ppm | ≤60 s |
| Hydrogen Cyanide (HCN) | 0-50 ppm | 0.1 ppm | ≤200 s |
| Hydrogen Chloride (HCl) | 0-30 ppm | 0.1 ppm | ≤60 s |
| Phosphine (PH3) | 0-1000 ppm | 0.1/1 ppm | ≤25 s |
| Ozone (O3) | 0-20 ppm | 0.1 ppm | ≤50 s |
Instrument Specifications
| Sampling method | Internal micro pump with 10 suction levels |
|---|---|
| Standard gas configuration | LEL + O2 + CO + H2S |
| Linear accuracy | <±5% F.S. |
| General response time | <10 s; gas-specific sensor response limits vary |
| Alarm modes | Audible, visual, and vibration |
| Alarm sound pressure | >90 dB |
| Display | Color LCD |
| Power | 3.7 V rechargeable lithium-ion battery |
| Charging | Magnetic charging |
| Standby time | At least 30 days |
| Use time | At least 24 hours |
| Operating temperature | -35 to 65 °C |
| Operating humidity | 5-95% RH, non-condensing |
| Dimensions | 210 x 73 x 50 mm |
| Approximate weight | 0.4 kg |
| Housing / ingress protection | ABS / IP66 |
| Explosion-protection marking | Ex ib IIC T4 Gb |
Selection Notes
The 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.
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.
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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.
