Target: hydrogen H2 gas leakage
Model: GMV-2021B
Detection range: 0.1~1000ppm(H2)
Detection principle: MEMS
Characteristics: All solid state, lightweight, low power consumption, long life, excellent anti-interference capability

GMV-2021B Manual download
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GMV-2021B hydrogen sensor is a gas sensor based on all solid state MOS principle of advanced MEMS architecture. Hydrogen in the environment will lead to the change of MOS conductivity, which is an exponential function of hydrogen concentration.


  • Hydrogen fuel cell automobiles,electric vehicles EV
  • Energy storage lithium battery pack /power station
  • Energy storage battery / power station
  • Hydrogen detection in other scenarios


All solid state, lightweight, low power consumption, long life, excellent anti-interference capability.


Part No. GMV-2021B
Sensor Type MEMS-MOS
Standard Encapsulation Ceramic
Target Gas H2
Detection Range 0.1~1000ppm(H2)
  Standard Circuit Conditions Loop Voltage VC ≤24V DC
Heater Voltage VH 2.5V±0. 1V AC or DC
Load Resistance RL Adjustable
    Sensor character under standard test conditions Heater Resistance RH 80Ω±5Ω(Room temperature)
Heater consumption PH ≤50mW
sensitive materials resistance RS 1KΩ~30KΩ(in 200ppmH2)
Sensitivity S R0(in air)/Rs(in 200ppmH2)≥5
Concentration slope α ≤0.6(R500ppm/R200ppmH2)

* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.

Technical Support:

Customized technical design and function, LOGO and package are available without extra charge (including molding fee) for mass volume.

The sensors don't have sleeping mode. It can be set in program if needed.

All Winsen products go through strict inspections and tests to make sure they are 100% qualified before shipping out.

The sensor has been fully tested (not calibrated) before leaving the factory. However, after transportation and storage, the environment conditions change, and the surface of the sensor absorbs moisture, mixed gas, pollution matters, etc. It is recommended that customers perform aging and calibration after sensors become stable according to the program and use occasions of the whole device.

15﹪-90﹪RH without condensation,greater or less than this range or long-term high temperature and high humidity will affect the life of the sensor.

Our sensors are certified with CE, 3C, ROHS, anti-explosion, fire prevention, and coal mining safety according to different applications. And we provide assistance for new certification.

Many factors can cause the sensor to fail such as broken wires in transportation, poisoning, falling off of the sensitive material, damage to the heating wire (device), etc. Please find specific cause in each category with Winsen’s aftersales.

Winsen provides professional consultation and service before and after sales. We will recommend the best fitting sensor for your demand. If you have any problem, don’t hesitate to email us to

Due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. But we will reply to your inquiry in 24 business hours.