Gravity: Factory Calibrated Electrochemical Ozone Sensor (0-10 ppm, I2C & UART)

The Gravity Electrochemical Ozone Sensor is a factory-calibrated detector designed to accurately measure ozone concentrations from 0 to 10 ppm. Featuring multiple output interfaces and broad microcontroller compatibility, it is well suited for makers, students, and engineers developing environmental and industrial air quality monitoring systems.

Electrochemical ozone detection

Utilising an electrochemical probe, the sensor delivers high sensitivity, strong anti-interference performance, and high stability across a 0 to 10 ppm detection range. The probe arrives pre-calibrated from the factory and has an operating lifespan exceeding two years in ambient air.

Flexible output options

The conversion board supports three output modes: I2C, 0 to 3V UART, and analog voltage. It also provides 32 configurable I2C addresses, allowing multiple gas sensors to share the same communication bus.

Onboard compensation and alarms

An integrated temperature compensation algorithm maintains accuracy across operating temperatures from -20 to 50 degrees Celsius and 15 to 90% non-condensing relative humidity. The board also includes a programmable threshold alarm function.

Microcontroller compatibility

The sensor operates on a 3.3V to 5.5V DC supply with an operating current below 5mA. It connects easily to Arduino, ESP32, and Raspberry Pi controllers using the standard Gravity 4-pin interface.

Modular multi-gas ecosystem

This unit is part of a 12-sensor electrochemical family that shares the same pinout, usage workflow, and data formatting. Users can combine ozone monitoring with other gas detection probes to build comprehensive air monitoring rigs.

Package contents

The kit includes one Gravity O3 signal conversion board measuring 37 by 32 mm, one calibrated O3 sensor probe, and one Gravity 4-pin connection cable.

Downloads & documentation

• Product wiki (DFRobot)