Digital & Analog Out MQ131 Sensor

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ATK-MQ131-GAS SENSOR GAS SENSOR
Overview
Sensitive material of MQ-131 gas sensor is SnO2, which with lower conductivity in clean air. When the target combustible gas exist, The sensor’s conductivity is more higher along with the gas concentration rising. Please use simple electro circuit, Convert change of conductivity to correspond output signal of gas concentration. MQ-131 gas sensor has high sensitivity detecting Of O3, also sensitive to CL2, NO2, etc Features
 Operating voltage: 5V
 Provide both digital and analog output
 Adjustable sensitivity
 Output LED indicator
 Compatible with Arduino and Microcontroller
 TTL Compatible
 Onboard holes for easy installation

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Applications
 Consumer electronics.
 They are used in air quality control equipments for buildings/offices, are suitable for detecting Of O3.
Specifications Parameter Min Typ Max Units
Working Voltage
4.5
5
8
Volts
Range
0-4.6
Volts
Pin Diagram
Pin Pin Name Pin Name
+5V
I/P
Regulated 5V supply input
GND
GND
Ground level of power supply
DO
O/P
Digital Output to external devices
AO
O/P
Analog Output to ADC
Note: Initially the sensor gives high output so power on the sensor for 15minites because it needs initially heating voltage then and then it gives proper output. More info refer the datasheet for the same. Recommend separate power supply because its required more current to heat.