Ozone 2 click is an Ozone detection (O3) sensor, based on the MQ131 gas sensor. This gas sensor has a sensitive layer made of SnO2, which changes its resistance when exposed to ozone. The sensor is able to sense O3 concentration in the range of 10 ppm to 1000 ppm. The Click board™ is also equipped with a trimmer potentiometer, used to adjust the sensitivity and offset of the MQ131 sensor. Low cross-influence of other oxidation gases such as CL2 and NO2, ensures a good accuracy of the sensor. The analog output of the sensor is sampled by a high-resolution 22-bit A/D converter (ADC), which offers the conversion result on the SPI interface. The analog signal from the sensor is also available, allowing an external ADC to be used.

Featuring an accurate 22-bit ADC and a high-quality O3 sensor protected by a stainless mesh, this Click board™ can be used in a range of applications used to measure or detect O3 gas concentrations in the atmosphere, for small testing equipment development, various warning systems for air quality / ozone pollution, and other similar applications that are used for the ozone concentration detection and monitoring.

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