Amazon.com: ACEIRMC 5pcs MQ-3 MQ3 Alcohol Sensor Module Breath Gas Detector Ethanol Detection Module for Arduino Raspberry Pi ESP8266 MQ3 5V DC (MQ-3) : Industrial & Scientific
Amazon.com: ViaGasaFamido 2Pcs MQ-3 Alcohol Gas Sensor Module, Ethanol Detector Breath Gas Double-Sided Circuit Detection Board with Power Indicator TTL Signal Output Indicator
MQ-3 Alcohol Gas Sensor Module - Circuit Specialists