digital & analog out mq2 sensor
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ATK-MQ2-LPG/Propane/ Hydrogen
LPG/Propane/ Hydrogen Sensor
Overview
Sensitive material of MQ-2 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-2 gas sensor has high sensitivity to LPG, Propane and Hydrogen, also could
be used to Methane and other combustible steam, it is with low cost and suitable
for different application.
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
Domestic gas leakage detector
Industrial Combustible gas detector
Portable gas detector
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.