H2-meTCD 4-20mA

High-precision, maintenance-free hydrogen detection

H2-meTCD 4-20mA

High-precision, maintenance-free hydrogen detection

The H2-meTCD 4-20mA offers a 4-20mA output signal and I2C connectivity for adjusting zero-point and gain of the sensor. Based on a thermal conductivity operation principle, it is designed for use in a variety of applications which require an accurate hydrogen determination in nitrogen or other non oxygen-containing atmospheres.

Key Features & Benefits


Accurate measurement up to 100 vol-%


  • Detects hydrogen in air and nitrogen
  • Linear output up to 5 vol-%



Unmatched environmental robustness


  • Operates in 0% to 100% relative humidity
  • Temperature range -20°C to +85°C



Fast, reversible reaction times

 

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



Built-in stability & protection


  • 4-20mA current-loop output with secure industrial interface
  • Reverse polarity and over-voltage protection for dependable integration



Engineered for longevity


  • Very low power consumption of < 10 mW
  • No regular maintenance required
  • Designed for years stable, continuious operation


Key Features & Benefits


  • Accurate measurement up to 100 vol-%


Detects hydrogen in air and nitrogen 

Linear output up to 5 vol-%



  • Unmatched environmental robustness


Operates in 0% to 100% relative humidity

Temperature range -20°C to +85°C



  • Fast, reversible reaction times

 

Enables rapid detection and clear recovery

Ideal for critical applications where reaction time matters



  • Built-in stability & protection


4-20mA current-loop output with secure industrial interface

Reverse polarity and over-voltage protection for dependable integration



  • Engineered for longevity


Very low power consumption of < 10 mW

No regular maintenance required

Designed for years stable, continuious operation


Pin Configuration

Pin Configuration

Pin 1

+7.5 V positive supply voltage with respect to ground 


Pin 2

Current output connect to 0 V of the current loop 


Pin 3

Ground of the internal electronics. The pin is electrically not connected to the housing


Pin 4

Current input connect to +24 V of the current loop*


SCL

Clock line of the I2C bus** 


SDA

Data line of the I2C bus** 



* The current loop must be galvanically decoupled from the supply voltage. No common mass is allowed. The current loop must contain a driving voltage source (recommended value: +24 V). 

**If connected, provide necessary pull-up resistors to SCL and SDA (e.g. 4.7 kOhm). 


Evaluation kit

For full accecibility for your sensor

Pin 1

+7.5 V positive supply voltage with respect to ground 


Pin 2

Current output connect to 0 V of the current loop 


Pin 3

Ground of the internal electronics. The pin is electrically not connected to the housing


Pin 4

Current input connect to +24 V of the current loop*


SCL
Clock line of the I2C bus**


SDA

Data line of the I2C bus**



* The current loop must be galvanically decoupled from the supply voltage. No common mass is allowed. The current loop must contain a driving voltage source (recommended value: +24 V). 

**If connected, provide necessary pull-up resistors to SCL and SDA (e.g. 4.7 kOhm). 


Evaluation kit

For full accecibility for your sensor

DCC-PGA-ADC 3.4

The evaluation kit enables controlled operation and signal analysis

DCC-PGA-ADC 3.4

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!