Joy-iT MQ135 Analog Air quality sensor

This analog gas sensor has a small heating part with an electronical chemical sensor.
It is suitable for indoor usage.
The sensor can output exact values only after warmup phase.

Caution: sensor gets hot while usage!

Technical data:

Measurement range: 10 - 1000 ppm

Measureable substances: Benzene (C6H6), Ammonia (NH3), sulfide, smoke, other air pollution

Application areas: Detecting gas leaks, gas alarm, robotic, microcontroller projects

Compatible with: Raspberry Pi (with AD-converter), Arduino. etc.

Special features: High sensitivity, detection of a wide range of concentrations

Analog Output: Values are processed by the microcontroller

Digital Output: thresholds can be set

Pins: VCC: Voltage supply 5V, GND: Ground, AOUT: Analog Output, DOUT: Digital Output

Detection ranges: Ammonia (NH3), Alcohol: 10 - 300 ppm Benzene: 10 - 1000 ppm

Loop voltage: ≥ 24 V DC

Heating voltage: 5.0 V ± 0.2 V

Heating resistance: 31 Ω ± 3 Ω at room temperature

Heating power: ≤ 900 mW

Sensitivity: Rs (in air)/ Rs (100ppm NH3) ≥5

Operating temperature: -10 - 50 °C