H2-CNI I2C-I FWB-A

High-precision, maintenance-free hydrogen detection

H2-CNI I2C-I FWB-A

High-precision, maintenance-free hydrogen detection

The H2-CNI I2C-I FWB-A is an advanced, industrial-grade hydrogen sensor that contains the entire electronic circuitry for control and read-out through the I2C digital bus. Built on a catalytically highly active, siloxane-resistant element operating on a non-isothermal calorimetric principle, this sensor delivers consistent performance from lab environments to real-world deployment.


The H2-CNI I2C-I FWB-A is an advanced, industrial-grade hydrogen sensor that contains the entire electronic circuitry for control and read-out through the I2C digital bus. Built on a catalytically highly active, siloxane-resistant element operating on a non-isothermal calorimetric principle, this sensor delivers consistent performance from lab environments to real-world deployment.

Key Features & Benefits


  • Accurate measurement up to 12 vol-%


Detects hydrogen in air with 100 ppm resolution

Linear response curve for simplified calibration and reliable readouts



  • Unmatched environmental robustness


Resistant to valatile siloxanes and carbon monoxide - common catalyst poisons

No cross-sensitivity against hydrocarbons such as methane and ethane

Operates in 0% to 100% relative humidity without baseline drift

Temperature range -40°C to +85°C

Ultralow thermal drift



  • Fast, reversible reaction times

 

Enables rapid detection and clear recovery

Ideal for critical applications where reaction time matters



  • Engineered for longevity


No regular maintenance required

Designed for years stable, continuious operation 

Key Features & Benefits


Accurate measurement up to 12 vol-%


  • Detects hydrogen in air with 100 ppm resolution
  • Linear response curve for simplified calibration and reliable readouts


Unmatched environmental robustness


  • Resistant to valatile siloxanes and carbon monoxide - common catalyst poisons
  • No cross-sensitivity against hydrocarbons such as methane and ethane
  • Operates in 0% to 100% relative humidity without baseline drift
  • Temperature range -40°C to +85°C
  • Ultralow thermal drift


Fast, reversible reaction times

 

  • Enables rapid detection and clear recovery
  • Ideal for critical applications where reaction time matters


Engineered for longevity


  • No regular maintenance required
  • Designed for years stable, continuious operation 

Pin Configuration

Pin Configuration

Pin 1

Midpoint of the 2nd branch of the Wheatstone bridge (can remain unconnected) 


Pin 3

Clock line of I2C bus 


Pin 4

Bridge excitation voltage connected to 1st junction of the active sensing element, can be connected to VPOW if a single supply voltage is used (FWB-B only). Otherwise, a positive voltage with respect to AGND must be applied. Leave unconnected for FWB-A sensors. 


Pin 5

Junction between active sensor element and reference element (can remain unconnected)

 

Pin 6

1st junction of reference element, must be connected to AGND


Pin 7

I2C ground


Pin 8

Data line of I2C bus


Pin 9

Supply voltage of internal electronics


Pin 1

Midpoint of the 2nd branch of the Wheatstone bridge (can remanin unconnected)


Pin 3

Clock line of I2C bus


Pin 4

Bridge excitation voltage connected to 1st junction of the active sensing element, can be connected to VPOW if a single supply voltage is used (FWB-B only). Otherwise, a positive voltage with respect to AGND must be applied. Leave unconnected for FWB-A sensors. 


Pin 5

Junction between active sensor element and reference element (can remain unconnected)


Pin 6

1st junction of reference element, must be connected to AGND


Pin 7

I2C ground


Pin 8

Data line of I2C bus


Pin 9

Supply voltage of internal electronics

Evaluation kit

For full accecibility for your sensor

Evaluation kit

For full accecibility for your sensor

I2C-USB 2.1

The evaluation kit enables controlled operation and signal analysis

Need a custom solution?


We offer customization options on existing sensors as well as custom

development of completely new sensors or features.


Tell us about your needs and we'll get back to you!

I2C-USB 2.1

The evaluation kit enables controlled operation and signal analysis

Need a custom solution?


We offer customization options on existing sensors as well as custom

development of completely new sensors or features.


Tell us about your needs and we'll get back to you!