Overview

The MQ-6 gas sensor uses tin dioxide (SnO2), a gas-sensitive material with low conductivity in clean air. When combustible gases are present in the sensor's environment, the sensor's conductivity increases with the concentration of the combustible gas in the air. A simple circuit can convert this conductivity change into an output signal corresponding to the gas concentration. The MQ-6 gas sensor has high sensitivity to propane, butane, and liquefied petroleum gas (LPG), and also exhibits good sensitivity to natural gas. This sensor can detect a variety of combustible gases and is a low-cost sensor suitable for various applications.

Module Applications: Suitable for household or industrial applications requiring the detection of LPG (liquefied petroleum gas), butane, propane, and LNG (liquefied natural gas). Excellent resistance to interference from ethanol vapor and smoke.

Features

• High-quality double-sided panel design with power indicator and TTL signal output indicator;

• Features DO switch signal (TTL) output and AO analog signal output;

• TTL output valid signal is low level. (The indicator light illuminates when the output is low, allowing direct connection to a microcontroller or relay module.)

• Analog output: 0~5V voltage, with higher voltage at higher concentrations.

• Good sensitivity for propane, butane, LPG, and LNG detection.

• Four screw holes for easy positioning.

• Dimensions: 32mm(L)*20mm(W)*22mm(H)

• Long service life and reliable stability.

• Fast response and recovery characteristics.

Specification

• Input Voltage: DC5V

• Power Consumption (Current): 150mA

• DO Output: TTL digital 0 (L) and 1 (H) (0.1V and 5V)

• AO Output: 0.1-0.3V (relatively pollution-free), maximum concentration voltage around 4V

*Note: After powering on, the sensor requires approximately 20 seconds of preheating for the measured data to stabilize. Sensor heating is normal due to the internal heating element; however, if it becomes too hot to touch, it is abnormal.