This module is a basically a breakout board for SGX Sensortech MICS 6814 Air Quality MOS Triple sensor. MiCS-6814 is a compact MOS sensor with three fully independent sensing elements on one package. It is a robust MEMS sensor for the detection of pollution from automobile exhausts and for agricultural/industrial odors.

MICS 6814 has a silicon gas sensor structure which consists of an accurately micro machined diaphragm with an embedded heating resistor and the sensing layer on top. The MiCS-6814 includes three sensor chips with independent heaters and sensitive layers. One sensor chip detects oxidising gases (OX) , the other sensor detects reducing gases (RED) and the other detects Ammonia (NH3).

Detectable gases:

• Carbon monoxide CO 1 - 1000 ppm
• Nitrogen dioxide NO2 0.05 - 10 ppm
• Ethanol C2H5OH 10 - 500 ppm
• Hydrogen H2 1 - 1000 ppm
• Ammonia NH3 1 - 500 ppm
• Methane CH4 >1000 ppm
• Propane C3H8 >1000 ppm
• Iso-butane C4H10 >1000 ppm

Datasheets:

MICS-6814 Air Quality Sensor Datasheet
Arduino Github Library for MICS-6814