MQ-135 Air Quality Dectection Sensor Module

MQ 135 Sensor, Air Quality Detection Sensor Module

MQ 135 Sensor Introduction:

The MQ135 gas sensor uses tin dioxide (SnO2), a gas-sensitive material with low conductivity in clean air. When polluted gases are present in the sensor’s environment, the sensor’s conductivity increases as the concentration of the pollutant increases. A simple circuit converts this conductivity change into an output signal corresponding to the gas concentration.

The MQ 135 sensor is highly sensitive to ammonia, sulfide, and benzene vapors, and is also ideal for monitoring smoke and other hazardous gases. This sensor can detect a wide range of harmful gases and is a low-cost sensor suitable for a variety of applications. Module Applications:
Used as a hazardous gas detector for homes and the environment, suitable for detecting harmful gases such as ammonia, aromatic compounds, sulfides, benzene vapor, and smoke. The gas sensor has a test concentration range of 10 to 1000 ppm.

Module Features:

• High-quality dual-panel design with power indicator and TTL signal output.
• DO switch signal (TTL) output and AO analog signal output.
• TTL output is active low. (When the output is low, the signal light illuminates, allowing direct connection to a microcontroller or relay module.)
• Analog output voltage range of 0 to 5V; the higher the concentration, the higher the voltage.
• Excellent sensitivity for air quality and hazardous gas detection.
• Four screw holes for easy positioning.
• Product dimensions: 32mm (length) * 22mm (width) * 27mm (height).
• Long service life and reliable stability.
• Fast response and recovery characteristics.
• Operating voltage: 5V

This module can be used with arduino development board control.