MQ135 Air Quality Control Gas Sensor Module (NH3, NOx, Alcohol, Benzene, Smoke And CO2)

High sensitivity to butane, propane, methane
The reference concentration can be adjusted by the blue potentiometer, clockwise to reduce the reference concentration, counter-clockwise rotation, the reference concentration
The Heating Voltage: 5 ? 0.2V (AC ? DC)
The Working Current: 150ma
The Loop Voltage: < DC15V (Maximum DC15V)
The Load Resistance: 1K (Adjustable)
The Detection Concentration Range: 100-20000ppm (Different Concentrations of Different Gas Ranges)
Clean the Air Voltage: < 1.5V
The Sensitivity: < 3%
The Response Time: < 1S (Warm-Up 3-5 Minutes)
Response Time: < 30S
Component Power Consumption: < 0.9W
The Working Temperature: -10 ~ 50 ? (Nominal Temperature 20 ?)
The Working Humidity: 95% RH (Nominal Humidity 65% RH)
VCC: Connect 5V power supply positive pole
DOUT: digital signal output, you can directly access the MCU IO port
AOUT: analogue signal output, AD converter can be connected to the input port in order to calculate the specific concentration of gas value
GND: 5V power supply negative