MQ-135 Air Quallty Sensor

Feature:
With signal output instructions
TTL output signal is low level
Analog 0 ~ 5 v voltage output, the higher the concentration, the higher the voltage
Color is show as pictures.
PLS NOTE that due to lighting effects, monitor's brightness / contrast settings etc, there could be some slight differences in the color tone of the pictures and the actual item!

Specification:
Air Quality Sensor Module
Condition: New
Size: 32mm X22mm X27mm
Main chip: MQ-135
Working voltage: DC 5v