by 
Greekgod
ANSWERS: 2
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Best answer I coud find with Google and I have no idea what it means: (But I'll come back to analize it more later) CHECS - Ethylene sensor Principle of operation:. the measurement of ethylene is based on reversible conductivity change of the sensing element at an appropriate working temperature ... www.ien.it/users/checs/checs_site/ethylene.html http://www.ien.it/users/checs/checs_site/ethylene.html Sensor type: miniaturized semiconductor gas sensor. The sensitive element consists of a semiconducting metal oxide layer Principle of operation: the measurement of ethylene is based on reversible conductivity change of the sensing element at an appropriate working temperature Deposition procedure: the thin semiconducting metal oxide layer is deposited by sputtering on an integrated heater. The sensitive area of the device is thermally insulated from the silicon substrate to minimize electrical power consumption. The micromachined substrate is supplied from Microsens CH.
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The IR-measurement of ethylene.
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