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SKU: 1314951
  1. Type:  Gas Ozone Sensor
  2. Interface: Analog, SPI
  3. Compatibility:  mikroBUS
  4. Click board Size: 57.15 x 25.4 mm
  5. Input Voltage: 3.3V or 5V


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Category: Gas and Dust Sensor

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.

How Does It Work?

The main sensor component of the Ozone 2 click is the MQ131 ozone (O3) gas sensor from Winsen Sensor, which uses the SnO2 (tin-oxide) alloy, which decreases its resistance while exposed to the O3 gas. The greater the O3 concentration is, the more conductive this material becomes. This can be utilized to obtain the O3 concentration readings. The sensor itself contains a small heating element, connected to 5V power supply.

It needs to be preheated for 48h before it can perform as specified. The sensitivity of the sensor is given as the ratio between the resistance in air and the resistance in the O3 gas concentration of 50ppm, which is ≥ 3 (RO/RS ≥ 3). The sensor is protected against particles and mechanical damage by a stainless mesh, however, exposure to excessive moisture and corrosive gases can damage the inner structure.


Applications: It can be used in different Ozone concentration detectors for air quality control, or for gas leak detection.


  1. Type:  Gas Ozone Sensor
  2. Interface: Analog, SPI
  3. Compatibility:  mikroBUS
  4. Input Voltage: 3.3V or 5V
  5. On-board modules MQ131 sensor, MCP3551
  6. Key Features Ozone concentration 10-1000 ppm
  7. Communicates over the AN pin or ADC MCP3551
  8. Sensitivity Rs(in air)/Rs(in 50 ppm O3)≥3,
  9. Onboard potentiometer for calibration

Useful Links:

Package Includes:

1 x Mikroe OZONE 2 CLICK

SKU: 1314951 Category:
Product Type

Gas Ozone Sensor


Analog, SPI



Input Voltage (V)

3.3V or 5V

Board Size (mm)

57.15 x 25.4 mm



Shipping Weight 0.06 kg
Shipping Dimensions 6 × 4 × 2 cm

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Country Of Origin: China