MQ-131 Ozone Gas Sensor Arduino

The gas sensitive material used in the MQ131 ozone gas sensor is tin dioxide (Sn02), which has a low conductivity in clean air. When ozone gas is present in the environment of the sensor, the conductivity of the sensor increases with the increase of the concentration of ozone gas in the air. A simple circuit can be used to convert the change in conductivity into an output signal corresponding to the concentration of that gas. MQ131 Ozone gas sensor has high sensitivity to ozone, strong oxidizing gases such as chlorine and nitrogen dioxide also have a certain sensitivity, and organic interference gases react in the opposite direction to ozone.
Application fields: household ozone concentration alarm, industrial, ozone concentration alarm, portable ozone concentration detector. 

Technical data:

Main chip: MQ131 gas sensing probe
Working voltage: DC 5V
With the signal output LED indicator
Dual signal output (analog output, and TTL-level output)
Analog output increases with the concentration, the higher the concentration, the higher voltage
High sensitivity for ozone gas (probe concentration range 10PPB-2PPM)
Long life and reliable stability
Rapid response and recovery characteristics
With mounting holes for easy fixed installation
Detection capability: O₃ (Ozone), Cl₂, NO₂
Power consumption: approx. 900mW (180mA at 5V)
Dimensions: 32 x 22 x 30 mm (L x W x H)