A 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.
Pumped Sampling and Daily Controls
The 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.
Self-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.
CO, H2S, Oxygen and LEL Channels
Three electrochemical channels measure CO, H2S and O2, while the combustible gas channel uses catalytic combustion. This is one complete four-gas configuration:
| Gas channel | Measurement range | Resolution | Sensor principle |
|---|---|---|---|
| Carbon monoxide (CO) | 0-1000 ppm | 1 ppm | Electrochemical |
| Hydrogen sulfide (H2S) | 0-100 ppm | 0.1 ppm | Electrochemical |
| Oxygen (O2) | 0-30% Vol | 0.01% Vol | Electrochemical |
| Combustible gas (LEL) | 0-100% LEL | 1% LEL | Catalytic combustion |
CO 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.
Instrument Specifications
| Item | Specification |
|---|---|
| Model | MH2000-M4 |
| Configuration | CO / H2S / O2 / LEL |
| Sampling method | Internal sampling pump |
| Maximum pump flow | Up to 1 L/min |
| Pump control | 10 adjustable suction levels |
| Display | LCD dot-matrix display |
| Displayed information | Gas type, concentration, unit, time and battery status |
| Interface languages | English and Chinese |
| Alarm indication | Sound and light |
| Alarm settings | Two stages with adjustable set points |
| Concentration compensation | Temperature and pressure compensation |
| Calibration controls | Self-calibration and zero calibration |
| Reset control | Restore factory settings |
| Battery | 2300 mAh rechargeable lithium-polymer |
| Operating temperature | -20 to 50 Degree C |
| Operating humidity | 0-95% RH, non-condensing |
| Ingress protection | IP65 |
| Housing | Engineering plastic |
| Dimensions | 205 x 75 x 32 mm |
Included Items and Selection Notes
The 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.
Choose 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.
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.
