Product description: Gravity - H2 hydrogen sensor - I2C / UART - factory calibrated - DFRobot SEN0473
A sensor manufactured by DFRobot that allows you to measure the hydrogen H2 concentration. The module has a factory calibrated probe, which allows you to make precise measurements in a short time. It supports three interfaces: analog, I2C and UART. It has as many as 32 I2C addresses to choose from. The detection range is from 0 ppm to 1000 ppm. The module has strong anti-interference properties, very good sensitivity and high measurement stability.
Contents of the kit
- H2 hydrogen sensor adapter board
- H2 sensor probe
- Gravity 4-pin connection cable
Gravity - a sensor for hydrogen detection.
Product compatible with Arduino, ESP32, Raspberry Pi
The manufacturer has prepared a detailed user guide, which includes, among other things, connection instructions and sample program code.
The sensors have the same data format so they can work in parallel.
A series of pre-calibrated sensors from DFRobot
DFRobot has developed a series of sensors that have been factory calibrated. The series consists of up to 12 modules, which enable the detection of the most common gases. Among them we can find CO, O2, NH3, H2S, NO2, HCL, H2, PH3, SO2, O3, CL2, HF sensors.
In addition, the sensors in this series operate in the same way and have the same data format, so they can work in parallel.
Hydrogen a flammable gas
Hydrogen is the simplest chemical element and a flammable gas, which ignites on contact with air (due to the presence of oxygen). It is very important to detect its presence quickly enough, for example, if a hydrogen tank is leaking.
Hydrogen sensor application
- Industrial hydrogen detection
- Tank survey
- Broadly understood environmental protection
- Smart agriculture
Technical specification of the sensor
- Detectable gas: hydrogen H2
- Compatibility: Arduino, ESP32, Raspberry Pi
- Detection range: from 0 ppm to 1000 ppm
- Supply voltage: 3.3 V to 5.5 V DC
- Current consumption: ＜5 mA
- Output signal: analog
- Communication interface: UART / I2C
- Operating temperature range: -20°C to 50°C
- Lifetime: > 2 years
- Sensor adapter board dimensions: 37 x 32 mm
The sensor probe has been factory calibrated which allows fast and precise measurements.
Comparative table of the calibrated sensor series from DFRobot
| DFR-20981 | DFR-20982 | DFR-21003 | DFR-21002 | |
|---|---|---|---|---|
| Gas type | O2 oxygen | CO gas | H2S hydrogen sulphide | CL2 chlorine |
| Detection range | 0% to 25% vol. | 0 ppm to 1000 ppm | 0 ppm to 100 ppm | 0 ppm to 20 ppm |
| Resolution | 0.1% vol. | 1 ppm | 1 ppm | 0,1 ppm |
| Output voltage range V0 | 0 V to 1.5 V | 0.6 V to 3 V | 0.6 V to 3 V | 0 V to 2 V |
| Vout1 | 1 V @ 10% vol. | 0.9 V @ 200 ppm | 1.5 V @ 50 ppm | 1.2 V @ 10 ppm |
| Response time (T90) | ≤ 15 s | ≤ 30 s | ≤ 30 s | ≤ 60 s |
| DFR-21001 | DFR-21000 | DFR-20999 | DFR-20998 | |
|---|---|---|---|---|
| Gas type | NH3 ammonia | SO2 sulphur dioxide | NO2 nitrogen dioxide | O3 ozone |
| Detection range | 0 ppm to 100 ppm | 0 ppm to 20 ppm | 0 ppm to 20 ppm | 0 ppm to 10 ppm |
| Resolution | 1 ppm | 0,1 ppm | 0,1 ppm | 0,1 ppm |
| Output voltage range V0 | 0.6 V to 3 V | 0.6 V to 3 V | 0 V to 2 V | 0 V to 2 V |
| Vout1 | 1.4 V @ 50 ppm | 0.9 V @ 10 ppm | 1,3 V @ 10 ppm | 0.7 V @ 5 ppm |
| Response time (T90) | ≤ 150 s | ≤ 30 s | ≤ 30 s | ≤ 120 s |
| DFR-20997 | DFR-20996 | DFR-21010 | DFR-20995 | |
|---|---|---|---|---|
| Gas type | H2 hydrogen | HCL hydrogen chloride | HF hydrogen fluoride | PH3 hydrogen phosphide |
| Detection range | 0 ppm to 1000 ppm | 0 ppm to 10 ppm | 0 ppm to 10 ppm | 0 ppm to 1000 ppm |
| Resolution | 1 ppm | 0,1 ppm | 0,1 ppm | 0,1 ppm |
| Output voltage range V0 | 0.6 V to 3 V | 0 V to 2 V | 0 V to 2 V | 0.6 V to 3 V |
| Vout1 | 1.3 V @ 500 ppm | 0.7 V @ 5 ppm | 0,7 V @ 5 ppm | 0.7 V @ 50 ppm |
| Response time (T90) | ≤ 120 s | ≤ 60 s | ≤ 60 s | ≤ 30 s |
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