MQ-3 Alcohol Gas Sensor Detection Module
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Characteristics
1, with signal output instructions;
2, dual signal output (analog output and TTL level output);
3, TTL output signal is low, can be directly connected to the microcontroller;
4. Analog output 0~5V voltage, the higher the concentration, the higher the voltage;
5. High sensitivity and good selectivity to ethanol vapor;
6, has a long service life and reliable stability;
7, rapid response recovery characteristics;
Features
size: 32mm X22mm X22mm length * width * height
Main chip: LM393, MQ-3 gas sensor
Working voltage: DC3-5V
Application
It is used for on-the-spot testing of motor vehicle drivers and other non-drinking workers. It is also used for the detection of ethanol vapor in other locations. The scope of detection is alcohol: the detection range is 10 to 1000 ppm.
Electrical Parameters
Input Voltage: DC5V
Power Consumption (Current): 150mA
DO output: TTL digital quantities 0 and 1 (0.1 and 5V)
AO output: 0.1-0.3V (relatively no pollution), the highest concentration voltage is about 4V
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