Keyestudio Formaldehyde - Toluene - Methane - Ethanol - Tobacco Gas Sensor for Arduino UNO R3

This versatile gas sensor is designed to detect specific organic volatile compounds in the air, including formaldehyde, toluene, methane, ethanol, and tobacco smoke. It is an ideal choice for South African students, educators, and makers building custom environmental monitoring systems or smart home automation projects.

Broad spectrum organic gas detection

The sensor is capable of detecting various organic volatile components such as formaldehyde, benzene, methane, xylene, and ethanol in the air. It can reliably detect target gas concentrations down to 0.1ppm.

Analogue and digital dual outputs

Equipped with both A0 and D0 pins, the sensor offers flexible integration. The A0 analogue pin outputs a higher value as the gas concentration increases, while the D0 digital pin outputs a HIGH signal when the gas content exceeds your set threshold.

Adjustable threshold and visual indicator

An onboard potentiometer on the back of the module allows you to easily adjust the zero threshold value. A built-in LED indicator provides a quick visual alert whenever the gas content exceeds this user-defined limit.

Compact physical and electrical specifications

Operating at 5V DC with a 100mA current draw, this compact 3.4g module measures just 33mm by 18mm by 9mm. It features a standard 2.54mm pitch 4-pin header and a 3.2mm positioning hole for secure mounting.