3Pcs MQ-135 MQ135 Air Quality Sensor Hazardous Gas Detection Module Gas sensor DC 5V For Arduino Sensors
Double-sided panel design, with power supply indication and TTL signal output indication;
With DO switching signal (TTL) output and AO analog signal output;
The effective signal of TTL output is low level. (When the output low level signal light, can be directly connected to the microcontroller or relay module)
Analog output voltage, the higher the concentration of the higher voltage.
Input voltage: DC5V Power consumption (current): 150mA
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