MQ-3 Sensor Module (MQ-3 – Alcohol, Ethanol, smoke)

Description

• Highly Senestive for detecting Gas Like Alcohol , Ethanol , Benzine, CH4 ,Hexane, LPG ,CO etc.
• Compatatable With Aduino UNO , MEGA , Nanao / Raspberry Pi / ESP32 / CP2102 And other Popular Devlopment Boards
• There is a resistance across an A and B inside the sensor which varies on detection of alcohol. More the alcohol, the lower the resistance. The alcohol is measured by measuring this resistance. The sensor and load resistor form a voltage divider, and the lower the sensor resistance, the higher the voltage reading will be.
• Structure and configuration of MQ-3 gas sensor is shown in the figure above for Configuration A or B, sensor composed by micro AL2O3 ceramic tube, Tin Dioxide (SnO2) sensitive layer, measuring electrode and heater are fixed into a crust made by plastic and stainless steel net. The heater provides necessary work conditions for work of sensitive components. The enveloped MQ-3 have 6 pin, 4 of them are used to fetch signals, and other 2 are used for providing heating current.
• Package Included : 1 X MQ-3 Alcohol Gas Sensor Module