The MH2000-NO2 Low Range detector measures nitrogen dioxide in ambient air with an electrochemical sensor and an internal sampling pump. Two separate versions are available: 0-1 ppm and 0-5 ppm. Both have 0.001 ppm resolution. Choose the span that covers the sample concentration expected in the measurement procedure.
Choose the 1 ppm or 5 ppm Version
The 0-1 ppm version provides a lower maximum measuring span, while the 0-5 ppm option covers a broader low-concentration interval. Each instrument is configured for the range selected when ordering. The supplied detector does not automatically switch between the two versions.
Resolution is the stated reading increment. The 0.001 ppm value does not establish a detection limit or a numerical accuracy specification. This High Precision, single-gas configuration measures NO2 for ambient-air tasks. Choose the separate flue-gas-specific NO2 version when that application is required.
Readings and Alarm Settings
An LCD dot-matrix display shows the gas type, concentration, unit, battery level and time. English and Chinese operating interfaces are available. Concentration units include μmol/mol, ppm and mg/m³, with 1 μmol/mol equivalent to 1 ppm.
Two alarm stages allow the setpoints to be adjusted. Sound, light and vibration provide the alarm outputs, including an 85 dB sound alarm and blue/red alarm lights. Self-check, zero calibration, factory reset, and temperature and pressure compensation support instrument setup. Use these controls according to the supplied instructions for the selected low-range NO2 configuration.
Specifications
| Item | Specification |
|---|---|
| Model | MH2000-NO2 |
| Detected gas | Nitrogen dioxide (NO2) |
| Configuration | High Precision, ambient-air, single-gas |
| Measuring range options | 0-1 or 0-5 ppm |
| Resolution | 0.001 ppm for both Low Range options |
| Sensor principle | Electrochemical |
| Sampling method | Internal sampling pump |
| Pump flow | Up to 1 L/min |
| Pump adjustment | 10 settings |
| Display | LCD dot matrix; gas type, concentration, unit, battery level and time |
| Operating languages | English and Chinese |
| Concentration units | μmol/mol / ppm / mg/m³; 1 μmol/mol = 1 ppm |
| Alarm outputs | Sound, light and vibration |
| Alarm stages | Two |
| Alarm setpoints | User adjustable |
| Sound alarm | 85 dB |
| Alarm lights | Blue for low alarm; red for high alarm |
| Measurement compensation | Temperature and pressure compensation |
| Instrument controls | Self-check, zero calibration and factory reset |
| Battery | 3.6 V, 2300 mAh rechargeable lithium polymer |
| Charging time | 4-6 hours |
| Operating temperature | -20°C to 50°C |
| Operating humidity | 0-95% RH, non-condensing |
| Protection rating | IP65 |
| Dimensions | 205 x 75 x 32 mm |
| Instrument weight | 300 g |
| Data recording / PC export | Optional; excluded from this base configuration |
Sampling and Recording Choices
The internal pump offers up to 1 L/min flow and ten adjustment settings. The 300 g detector uses a 3.6 V, 2300 mAh rechargeable lithium-polymer battery, with a charging time of 4-6 hours. Sampling filters, drying accessories and probes are separate package choices.
Data logging and PC export are optional and excluded from this base configuration. Gallery photographs show the shared pump-detector housing and its controls. Screen readings are illustrative; the carrying-case view does not represent two supplied instruments, and a connected cable does not establish included PC export.
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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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.
