FES Sensor Technology Hydrogen-Sensor H2-CNI 1V

H2-CNI 1V is a three-pin 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 a warning signal in the presence of potentially dangerous hydrogen concentrations in the ambient air.


  • Detection of hydrogen levels up to 100% LEL with 0.25 % 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 %
  • Ambient temperature range from -10 to +50 °C (optional: other temperature ranges)
  •  Linear output up to 100 % LEL
  •  On-board sensor electronics
  •  Zero-signal voltage adjusted to 1 V for operation with 4-20 mA interface electronics

Documents & downloads

Specification Sheet H2-CNI 1V Rev. 1.0


Christian Kallen
Christian Kallen
Account Manager
cka@alders.de +49 2152 8955-230