FES Sensor Technology Gassensoren Hydrogen-Sensor H2-CNI 0V-I & H2-CNI 0V-I ULTD

H2-CNI 0V-I is a precise calorimetric hydrogen sensor with a catalytically highly active and siloxane-resistant sensor element and is based on a non-isothermal calorimetric operation principle. It contains on-board electronics to reduce the effect of ambient temperature changes on hydrogen sensitivity and to provide appropriate output signals. It is designed for use in a variety of applications which require an accurate hydrogen determination in air.


  • Detection of hydrogen levels up to 100% LEL with 100 ppm resolution in air
  • No sensitivity against typical catalyst poisons such as volatile siloxanes and carbon monoxide
  • Fast response and recovery times
  • No humidity-induced base line drift
  • Applicable in relative humidity (rh) between 0 % to 100 %
  • Industrial temperature range from -40 to +80 °C
  • High mechanical stability
  • Linear output up to 100 % LEL
  • Available with ultra-low thermal drift (ULTD) and test protocol
  • On-board instrumentation amplifier and voltage output
  • Supply voltage with reversed bias protection

Documents & downloads

Specification Sheet H2-CNI 0V-I and -I ULTD Rev. 1.0
Christian Kallen
Christian Kallen
Account Manager
cka@alders.de +49 2152 8955-230