1.Of the human senses of smell gas sensor corresponding to the function as a device to detect various gases in the air, a kind of chemical sensor.
2.Dry gas and wet gas sensors consist of sensor.
3.Types, using different forms depending on the purpose and use and the development of gas sensors with capabilities.
normal state and gas detecting in sno2 grain boundary
Amount of desorption and absorption of oxide and free electron
can control sensor sensitivity
Electrode and the electrolyte solution while maintaining a constant current from the direct oxidation and reduction when measuring current to detect the gas.
Cause ionization of the electrolyte solution, the gas ions caused by the electromotive force acting on the electrode output.
Electrolyte solution and electrolytic reactions that occur when things are separated by the current output.
Oxidation catalyst (Pt, Pd) with aluminum oxide (Al2O3) and thorium (ThO2) in the ceramic 0.05 (mm) or less resistance of the platinum coil The structure of putting
Platinum resistance and bleeding in the constant current Road heat devices degree 200-300. When the combustible gas contact with this by action of the catalyst, Measure the increase the resistance of Pt Resistance wire by heat up university’s temperature

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