MQ131 Ozone Gas Sensor Module

MQ131 Ozone Gas Sensor Module is a compact board based on the MQ-131 sensor. It is equipped with a very wide range sensitivity to ozone which able to detect ozone concentration up to (10～1000ppb) in ambient air. The tin dioxide (SnO2) is the sensor's sensitive material, has a low conductivity (high resistance) in a clean air environment, and react really good in a presence of ozone. Thus, causing the sensor to be very sensitive in presence of ozone. The higher the ozone concentration the better the conductivity. The board has a trimmer to set the threshold value, analog output and digital output (TTL), status LED for power supply and output signal. The digital output can be connected directly to a microcontroller. The analogue output provides a voltage (0-5 VDC) that increases with increasing ozone concentration in the air. It can be used with Arduino or other microcontroller.

Features:

• Good sensitivity to Ozone in wide range (detection concentration range: low concentration probe 10PPB-1000PPB; high concentrations of probe 10ppm-1000ppm)
• This is low concentration (black bakelite version)
• The dual signal output (analog output, and TTL level output);
• TTL output valid signal is low; (lights on when output is low, can be accessed by the microcontroller IO port)
• The analog voltage decreases with increasing concentration, and the higher the concentration, the lower the voltage
• Fast response recovery characteristics
• High sensitivity to Ozone
• Long life and low cost
• With signal output LED indicator
• Product Size (mm): 30 (L) x 20 (W) x 30 (H)
• Weight : 13.5 g

Following conditions must be avoided:

• Water Condensation Indoor conditions, slight water condensation will effect sensors performance lightly. However, if water condensation on sensors surface and keep a certain period, sensor’s sensitivity will be decreased.
• Used in high gas concentration. No matter the sensor is electrified or not, if long time placed in high gas concentration, it will affect sensors characteristic.
• Long time exposed to adverse environment. No matter the sensor electrified or not, if exposed to adverse environment for long time, such as high humidity, high temperature, or high pollution etc, it will effect the sensors performance badly.
• Vibration Continual. Vibration will result in sensors down-lead response then repture. In transportation or assembling line, pneumatic screwdriver/ultrasonic welding machine can lead this vibration.
• Concussion. If sensors meet strong concussion, it may cause its lead wire to disconnect.

Packing List:

• 1 x MQ131 Ozone Gas Sensor Module

Resources:

• MQ131 Datasheet
• Example of coding:
  • Arduino-MQ131 Driver, by ostaquet, on github
  • MQ131 Ozone Gas Sensor Arduino Library, by bhaskar-anil, on github
• Example of sensor calibration, by empierre from github, Arduino code