3Pcs MQ3 Alcohol Ethanol Sensor Breath Gas Ethanol Detection Gas Sensor Module Geekcreit for Arduino - products that wor

Description Size approx 32 x 22 x 27mmMain chip LM393 ZYMQ 3 gas detectorWorking Voltage DC 5VWith signal output instructions Two way signal output TTL level output and analog output TTL output effectively signal for low level when the output low level signal lights can directly connected microcomputer Analog output 0 5v voltage the higher the concentration the higher the voltage Has a high sensitivity and good selectivity Has long service life and reliable stability Rapid response recovery features For motor vehicles and other prohibition drunken drivers homework personnel on site testing also used in other places of ethanol vapor detection Color is shown as pictures Package Included 3 x Gas Sensor Module