Other places ethanol vapor detection of alcohol ( ethanol ) testing, field testing for motor vehicle drivers and other non- drinking and operating personnel
Module Features : 1 , using high-quality dual-panel design, with power indicator and TTL signal output instructions ; 2 , the switching signal having a DO (TTL) output and analog output AO ; 3, TTL output valid signal is low . ( Low-level signal when the output light can be directly connected to the microcontroller or relay module ) 4 , analog output voltage , the higher the concentration the higher the voltage . 5 , for the detection of alcohol have better sensitivity. 6 , there are four screw holes for easy positioning ; 7 Product dimensions : 32 (L) * 20 (W) * 22 (H) 8 , has a long life and reliable stability 9 , rapid response and recovery characteristics
Electrical properties: Input voltage : DC5V Power consumption ( current ): 150mA DO output : TTL digital 0 and 1 ( 0.1 and 5V) AO output :0.1-0 .3 V ( relative to pollution ) , the maximum concentration of a voltage of about 4V Special note: After the sensor is powered , needs to warm up around 20S, measured data was stable , heat sensor is a normal phenomenon , because the internal heating wire , if hot is not normal .
Wiring: 1, VCC: positive power supply (5V) 2, GND: power supply is negative 3, DO: TTL switching signal output 4, AO: analog signal output