MQ-135 Air Quality Sensor Hazardous Gas Detection Module

MQ135 gas sensor has high sensitivity to ammonia gas, sulfide, benzene series steam, also can monitor smoke and other toxic gases well. It can detect kinds of toxic gases and is a kind of low-cost sensor for kinds of applications.

The MQ-135 sensor module comes with a Digital Pin which makes this sensor to operate even without a microcontroller and that comes in handy when you are only trying to detect one particular gas. If you need to measure the gases in PPM, the analog pin need to be used. The analog pin is TTL driven and works on 5V and so can be used with most common microcontrollers.

Sensitive material of MQ135 gas sensor is SnO2, which with lower conductivity in clean air. When target pollution gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.

Features:

• Good sensitivity to Combustible gas in wide range
• High sensitivity to ammonia gas, sulfide, benzene series steam, smoke
• Input Voltage: 5V
• Long life and low cost
• Simple drive circuit
• Pin Definition: GND,VCC,Dout,Aout

Applications:

1. Domestic gas leakage detector
2. Industrial Combustible gas detector
3. Portable gas detector
4. Gas leak alarm

Country of origin : China

Note: The pins are pre-soldered to the module.

MQ-135 Air Quality Sensor Hazardous Gas Detection Module