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) - 50 - 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) - < 10 s Response time - < 30 s Response time after switch-on - &rt; 24 V loop voltage - 2 kOhm Load resistance - < 4 MOhm Resistance in clean air - &rt; 4 (in 1000 ppm butane C4H10) measurable substances - liquefied petroleum gases (LPG) - Propane - Methane - Butane - other natural gases Connections - VCC: Power supply 5V - GND: Ground connection - AOUT: Analog output - DOUT: Digital output Dimensions - L x W x H: 52 x 20 x 18 mm Note Attention: The sensor gets warm during operation! https://elecena.pl/product/18559543/sen-mq5-developer-boards-gas-sensor-liquid-gas-mq-5 2021-05-23 https://elecena.pl/product/18559543/sen-mq5-developer-boards-gas-sensor-liquid-gas-mq-5 2024-08-05