Monitor alcohol ethanol with this MQ-3 gas sensor from Waveshare! Comes complete with a 4-pin sensor cable. Note: Please do not use this sensor for critical home/industrial/commercial gas sensing applications. Intended for development and learning/hobby purposes only. Features * Sensitive for alcohol ethanol * Output voltage boosts along with the concentration of the measured gases increases * Fast response and recovery * Adjustable sensitivity * Signal output indicator * Sensor only - no cable Specifications * Power: 2.5V ~ 5.0V * Dimension: 40.0mm * 21.0mm * Mounting holes size: 2.0mm Package Contents * 1x MQ-3 sensor * 1x 4-pin sensor cable Resources * Product Wiki In the case of working with an MCU: * VCC ↔ 2.5V ~ 5.0V * GND ↔ power supply ground * AOUT ↔ MCU.IO (analog output) * DOUT ↔ MCU.IO (digital output) https://elecena.pl/product/22719120/mq-3-gas-sensor-alcohol-ethanol 2023-03-07 https://elecena.pl/product/22719120/mq-3-gas-sensor-alcohol-ethanol 2023-12-27 https://elecena.pl/product/22719120/mq-3-gas-sensor-alcohol-ethanol 2024-09-19 https://elecena.pl/product/22719120/mq-3-gas-sensor-alcohol-ethanol 2024-11-29 https://elecena.pl/product/22719120/mq-3-gas-sensor-alcohol-ethanol 2024-11-30 https://elecena.pl/product/22719120/mq-3-gas-sensor-alcohol-ethanol 2025-08-05 https://elecena.pl/product/22719120/mq-3-gas-sensor-alcohol-ethanol 2025-11-28 https://elecena.pl/product/22719120/mq-3-gas-sensor-alcohol-ethanol 2025-11-29