333111 Developer boards - Gas sensor, CO2/petrol/smoke, MQ-135

The MQ135 sensor can be used for various applications such as indoor air quality monitoring, gas leak detection and environmental sensors.

The main target gas is carbon dioxide (CO2), but it is also sensitive to a range of other gases, including volatile organic compounds (VOCs), alcohol vapors, benzene, smoke and other harmful gases. By integrating the MQ135 sensor with suitable electronic circuitry and microcontrollers such as Arduino (or a compatible board such as Dasduino), systems can be created that enable real-time monitoring and analysis of gas concentrations.

The breakout board supports both digital (DO) and analog signals (AO). The digital output signal is obtained by setting a threshold value with a potentiometer. The analog output signal varies depending on the intensity of the gas.

The MQ135 air quality sensor module operates at 5V and consumes about 150mA. It requires preheating to provide accurate results.

Technical specifications