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) measurable substances - liquefied petroleum gas (LPG) - i-Butane (C4H10) - propane (C3H8) - Methane (CH4) - hydrogen (H2) - Alcohol - Smoke Connections - VCC: Power supply 5V - GND: Ground connection - AOUT: Analog output - DOUT: Digital output Dimensions - L x W x H: 32 x 20 x 22 mm Note Attention: The sensor gets warm during operation! https://elecena.pl/product/18570516/sen-mq2-developer-boards-gas-sensor-gas-amp-smoke-mq-2 2021-05-25 https://elecena.pl/product/18570516/sen-mq2-developer-boards-gas-sensor-gas-amp-smoke-mq-2 2022-10-31