digital & analog out mq135 sensor
TRANSCRIPT
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ATK-MQ135-GAS SENSOR
GAS SENSOR
Overview
MQ-135 is a simple-to-use Ammonia (NH3) gas sensor, suitable for sensing
ammonia concentrations in the air. The MQ-135 can detect ammonia gas
concentrations up to 100ppm.
MQ-135 gas sensor has are suitable for detecting of NH3, NOx, alcohol, Benzene,
smoke, CO2, 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
Domestic air pollution 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.