How does MQ 2 sensor work?

Using a simple voltage divider network, concentrations of gas can be detected. MQ2 Gas sensor works on 5V DC and draws around 800mW. It can detect LPG, Smoke, Alcohol, Propane, Hydrogen, Methane and Carbon Monoxide concentrations anywhere from 200 to 10000ppm.Click to see full answer. Likewise, what is MQ Gas Sensor?MQ Gas Sensor Range – Low Cost Gas and Pollution Detectors. The MQ Gas sensor range have a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC.Also, what is mq2? MQ2 gas sensor is an electronic sensor used for sensing the concentration of gases in the air such as LPG, propane, methane, hydrogen, alcohol, smoke and carbon monoxide. MQ2 gas sensor is also known as chemiresistor. This sensor works on 5V DC voltage. It can detect gases in the concentration of range 200 to 10000ppm. Keeping this in consideration, how does the gas sensor work? A gas sensor is a device which detects the presence or concentration of gases in the atmosphere. Based on the concentration of the gas the sensor produces a corresponding potential difference by changing the resistance of the material inside the sensor, which can be measured as output voltage.How do you hook up a smoke sensor Arduino?Connect the VCC and the GND on the gas sensor to the 5V and GND pins on the Arduino. Then connect the A0 pin on the MQ-2 gas sensor to the A0 on the Arduino. After that, connect the Buzzer and the LEDs to the Arduino.