Air Quality Sensor (MQ-135)

Features

Wide detecting scope

Fast response and High sensitivity

Stable and long life

Operating Voltage is +5VDC

Detect/Measure NH3, NOx, alcohol, Benzene, smoke, CO2, etc.

Analog output voltage: 0V to 5V

Digital output voltage: 0V or 5V (TTL Logic)

Preheat duration 20 seconds

Can be used as a digital or analog sensor

The Sensitivity of digital output can be adjusted using on board potentiometer

The TTL output valid signal is low. (When the output is low, the signal light is on, it can be directly connected to the MCU or relay module)

The voltage of the analog output, the higher the concentration, the higher the voltage.

Arduino compatible

Comes with 4 mounting screw holes (M3 or 3mm size)

Product dimensions: 32 (L) * 20 (W) * 22 (H)