This analog gas sensor has a small heating element with an electronic-chemical sensor. It is suitable for use in buildings and can only provide accurate readings once the warm-up phase is complete. Features - compatible with Arduino - compatible with Raspberry Pi only in combination with art. no. RPI ADC (see accessories) - 100 - 10000 ppm Measuring range - high sensitivity (adjustable via potentiometer) - fast reaction time - Evaluation of the measured values from the microcontroller (analog) - Threshold value setting possible (digital) - < 1 s Response time - < 30 s Response time after switch-on - < 150 mA Heating current consumption - 5 V (+/- 0.2 V) Heating current voltage - 750 mW heating energy output measurable substances - Ethanol - Alcohol via the hydrogen concentration Connections - VCC: Power supply 5V - GND: Ground connection - AOUT: Analog output - DOUT: Digital output Dimensions - L x W x H: 32 x 21 x 20 mm Note Attention: The sensor gets warm during operation! https://elecena.pl/product/18282351/sen-mq3-developer-boards-gas-sensor-alcohol-ethanol-mq-3 2021-05-02 https://elecena.pl/product/18282351/sen-mq3-developer-boards-gas-sensor-alcohol-ethanol-mq-3 2025-02-08