The 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.
Standard Configuration and Custom Gas Options
The 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.
| Gas | Range | Accuracy | Minimum Reading | Sensor Response Limit |
|---|---|---|---|---|
| Combustible Gas (LEL) | 0-100% LEL | ≤±5% F.S. | 1% LEL | ≤15 s |
| Oxygen (O2) | 0-30% vol | ≤±5% F.S. | 0.1% vol | ≤20 s |
| Carbon Monoxide (CO) | 0-1000 ppm | ≤±5% F.S. | 1 ppm | ≤25 s |
| Hydrogen Sulfide (H2S) | 0-100 ppm | ≤±5% F.S. | 1 ppm | ≤30 s |
| Sulfur Dioxide (SO2) | 0-100 ppm | ≤±5% F.S. | 0.1 ppm | ≤30 s |
| Nitric Oxide (NO) | 0-250 ppm | ≤±5% F.S. | 1 ppm | ≤60 s |
| Nitrogen Dioxide (NO2) | 0-20 ppm | ≤±5% F.S. | 0.1 ppm | ≤25 s |
| Chlorine (Cl2) | 0-20 ppm | ≤±5% F.S. | 0.1 ppm | ≤30 s |
| Ammonia (NH3) | 0-100 ppm | ≤±5% F.S. | 1 ppm | ≤50 s |
| Hydrogen (H2) | 0-1000 ppm | ≤±5% F.S. | 1 ppm | ≤60 s |
| Hydrogen Cyanide (HCN) | 0-50 ppm | ≤±5% F.S. | 0.1 ppm | ≤200 s |
| Hydrogen Chloride (HCl) | 0-30 ppm | ≤±5% F.S. | 0.1 ppm | ≤60 s |
| Phosphine (PH3) | 0-1000 ppm | ≤±5% F.S. | 0.1/1 ppm | ≤25 s |
| Ozone (O3) | 0-20 ppm | ≤±5% F.S. | 0.1 ppm | ≤50 s |
Alarm and Display Features
- Audible, visual, and vibration alarms with sound pressure above 90 dB
- LCD shows gas concentration, gas type, unit, battery level, and time
- Chinese and English interface options
- ppm and mg/m³ unit switching where applicable
- Diffusion sampling without an internal pump
- Integrated back clip for portable use
Technical Specifications
| Standard gas configuration | LEL + O2 + CO + H2S |
|---|---|
| Custom gas options | Available by inquiry; see the supported gas table above |
| Sampling method | Diffusion |
| Linear accuracy | ≤±5% F.S. |
| General response time | <10 s |
| Alarm modes | Audible, visual, and vibration |
| Alarm sound pressure | >90 dB |
| Display | LCD |
| Power | 3.7 V rechargeable lithium-ion battery |
| Standby time | At least 30 days |
| Use time | At least 24 hours |
| Operating temperature | -35 to 65 °C |
| Operating humidity | 10-95% RH, non-condensing |
| Dimensions | 146 x 71 x 42 mm (H x W x D) |
| Approximate weight | 0.25 kg |
| Housing / ingress protection | ABS / IP66 |
| Explosion protection | Ex ib IIC T4 Gb |
Use Notes
Because 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.
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.
