Hydrogen (H2) Gas Sensor
Calibration free

H2 sensor

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GAS-H2-2 key sensor features
Introducing our calibration free digital SNMP & Modbus TCP sensor designed for monitoring 24x7 hydrogen H2 levels. For up to 100% LEL (lower explosive limit) or 40,000ppm H2.

Hydrogen Sensor - calibration free hydrogen sensor
- measures hydrogen in the air between 0 to 100% LEL
- resolution: 100ppm
- with a ± 5% accuracy.
- lifespan of >10 years in normal conditions.
- precision of 1%.
- maximum detection of 40,000 H2 ppm (=100% LEL)

- optional RS-485 version available with -48v or +24v input
- optional with 2 relay outputs that can be set at custom LEL levels

- sensors for 21 other gas types like CO, HF, NH3

- compact plug & play sensor.
- designed for indoor use.
- steel enclosure for non-power sensors or non-IP sensors. custom color & logo options available.
- industrial grade.
- 0u rack, DIN rail, magnetic or wall mountable sensor.
- plugs into the base unit.
- powered by the base unit (PoE, 12v DC, optionally 24v or -48v)
- alerts via SNMP Traps, email or SMS.
- out of the box integration via Modbus TCP, SNMP.
- optional integration via MQTT for Industrial IoT applications1New feature.
- optional integration via RS-485 enabling direct integration with your own gateway & controllers.2New feature

1Requires FW 10 or higher
2Some sensors are not available in RS-485 native versions. In that case RS-485 is available using the optional Modbus RTU module.
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modular architecture
hydrogen gas sensor architecture
A modular architecture enabling you to integrate it with your on-premises monitoring systems using IP based industrial protocols like Modbus TCP and SNMP. Optional add-on to connect sensor data to a Modbus RTU controller. With our optional and special firmware the base unit can connect to a MQTT provider of your choice.

With the output controls of the SensorHub, the system can on its own take corrective actions when too high hydrogen levels have been detected. For example you can start a fan as soon as hydrogen is detected and trigger a siren when a maximum limit has been exceeded.
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lab & bump testing
Prior to shipping every H2 sensor is manually tested in our lab against a 50% LEL hydrogen gas.

For bump testing we offer the optional SPARE-GAS-BUMP adapter which is mounted on to the sensor. It enables you to self test the sensor at frequent intervals to ensure its operation within your own safety & operational requirements.
hydrogen bump gas testing