MQ-3 Alcohol Ethanol Detection Sensor

Specifications:
Input voltage: DC5V
Power consumption (current) : 150 mA
DO Output: TTL digital 1 and 0 (0.1 and 5 V)
AO Output: 0.1-0.3 V (pollution-free)
Highest concentration of voltage: Approx 4 V
Detection range of alcohol: detection range of 10 ~ 1000 PPM


Connection mode:
1. VCC: Positive (5 v)
2. GND: Connect power negative
3. DO: TTL switch signal output
4. AO: Analog signal output