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This is a sensor that detects hydrogen concentration and supports three output modes: analog, I2C, and UART. The probe has been calibrated at the factory, which can quickly and accurately measure the concentration of hydrogen in the environment. Can be widely used in the detection of hydrogen in industrial and environmental protection fields.
The probe adopts the electrochemical principle, has the characteristics of strong anti-interference ability, high stability, high sensitivity, etc., and the service life is as long as two years. The sensor has 32 modifiable I2C addresses, an integrated temperature compensation algorithm, and a threshold alarm function, It has good compatibility with mainstream main control devices such as Arduino, ESP32, and Raspberry Pi. The easy-to-use Gravity interface, coupled with our sample code, can quickly build a hydrogen concentration detector.
DFRobot has introduced 12 gas detection sensors in this series, CO, O2, NH3, H2S, NO2, HCL, H2, PH3, SO2, O3, CL2, HF, which are used in exactly the same way and data format, so you can combine them according to your needs.

Features
Strong anti-interference ability
High stability
High sensitivity 

Applications
Industrial hydrogen detection
Environmental protection device

Specification
Detection Gas: Hydrogen (H2)
Detection range: 0~1000ppm
Working Voltage: 3.3~5.5V DC
Working Current: <5mA
Output Signal: I2C, UART (0~3V), analog voltage
Working Temperature: -20~50°C
Working Humidity: 15~90%RH (non-condensing)
Storage Temperature: -20~50°C
Storage Humidity: 15~90%RH (non-condensing)
Lifespan: >2 years (in the air)
Adapter Plate Size: 37*32mm
Compatibility: Arduino, ESP32, Raspberry pi 

Documents

Shipping List
Gravity: H2 Signal Conversion Board x1
H2 sensor probe x1
Gravity-4pin Cable x1

The Gravity: H2 Sensor (Calibrated) - I2C & UART appears in the following collections:

SKU DF-SEN0473