Pollution Sensor
Our pollution sensor is a dual sensor, one of them sensing oxdizing gases, the other one sensing reducing gases. Reducing gases:
Reducing gases include, Carbon Monoxide (CO), Carbon Dioxide (CO2) and Hydrocarbons.
Our sensor targets CO specifically, but will also pick up "noise" from other reducing gases.

Oxidizing gases:
oxidizing gases include Nitrogen Oxides (NOx) and Volatile Organic Compounds (VOC's).
NOx includes: nitric oxide (NO), nitrogen dioxide (NO2), nitric acid, nitrous oxide and nitrates.

Our sensor is rated to sense the entire family of nitrogen oxides, but specifcally targets NO2.

It will also pick up "noise" from the presence of Volatile Organic Compounds. VOC's are chemical compounds present in glues, silicon, cleaning materials and other household items.

We purchased our sensor from micro-chemical in switzerland. Note that this sensor is primarily used for automotive applications and we had to follow special calibration procedures in order to adapt it to our application.