DFRobot Gravity H2 Sensor (Calibrated) – I2C, UART and analog


Industrial hydrogen fluoride detection
Environmental protection device

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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.
Factory calibrated, accurate measurement
High sensitivity, low power consumption
Excellent stability and anti-interference
Three output modes: I2C, UART and analog
Long service life(2 years)
Compatible with 3.3~5.5V main controllers
32 modifiable I2C addresses
Reverse connection protection
Temperature compensation
Threshold alarm
It use I2C, UART and analog communication protocol to make smooth commutation between sensor and micro-controller.

Serial Protocol Synchronous/ Asynchronous Type Duplex Data transfer rate(kbps)
UART Asynchronous peer-to-peer Full-duplex 20
I2C Synchronous multi-master Half-duplex 3400


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℃
Working Humidity 15~90%RH (non-condensing)
Storage Temperature -20~50℃
Communication Protocol I2C, UART and analog
Compatibility Arduino, ESP32, Raspberry pi
Storage Humidity 15~90%RH (non-condensing)
Lifespan >2 years (in the air)
Adapter Plate Size 37 x 32mm


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