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Toxic and Oxygen

The Electrochemical Sensor (often referred to as Echem sensors or EC) is a sensor primarily used for Toxic gases and Oxygen detection.

When using a EC sensor, the gas diffuses into the sensor, through the back of the porous membrane to the working electrode where it is oxidized or reduced. This electrochemical reaction results in an electric current that passes through the external circuit. In addition to measuring, amplifying and performing other signal processing functions, the external circuit maintains the voltage across the sensor between the working and counter electrodes for a two electrode sensor or between the working and reference electrodes for a three electrode cell. At the counter electrode an equal and opposite reaction occurs, such that if the working electrode is an oxidation, then the counter electrode is a reduction.


 
Ammonia
Arsine
Carbon Monoxide
Chlorine
Chlorine Dioxide
Ethylene Oxide
Flourine
Hydrazine
Hydrogen
Hydrogen Chloride
Hydrogen Cyanide
Hydrogen Flouride
Hydrogen Sulfide
Nitric Oxide
Nitrogen Dioxide
Oxygen
Ozone
Phosphine (PH3)
Silane (SiH4)
Sulfur Dioxide