Sensor CH 1Our Hot-wire Semiconductor detects changes in resistance across the edges of platinum wire as a result of variations in thermal and electrical conductivity due to absorption of gas on the surface of a semiconductor.


Detection Principle
Structure of sensing element

ch structure


Sensor Performance

ch performance



  • Sensitive and large variation in output at low gas concentration.
  • Less initial stabilization time, more compact, more energy saving as compared with a semiconductor sensor.
  • Long service life, high stability, and high durability.
  • Selective sensitivity to gases(H2, CH4, C2H5OH).