Mq 4 Gas Sensor

Mq 4 sensor is highly sensitive to methane ch 4.

Mq 4 gas sensor.

Please use simple electrocircuit convert change of conductivity to correspond output. In this project we will go over how to build a methane sensor circuit with an arduino. Methane ch 4 is a colorless odorless gas. Lpg natural gas coal gas.

This sensor has a high sensitivity and fast response time. Besides the built in resistor it is necessary to include load resistor load resistor serve to adjust sensor. A gas sensor is a device which detects the presence or concentration of gases in the atmosphere. New code examples added for gas concentration mq series sensors use a small heater inside with an electro chemical sensor in order to measure different kind of gases combinations.

Mq gas sensor type has many derived type for every certain gas. When the target combustible gas exist the sensor s conductivity is more higher along with the gas concentration rising. The mq 4 can detect natural gas concentrations anywhere from 200 to 10000ppm. The mq 4 gas sensor has a built in variable resistor that changes its value according to the concentration of gas.

The heater provides necessary work conditions for work of. 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. If the concentration is high the resistance decreases if the concentration is low the resistance increases. Mq 4 semiconductor sensor for natural gas sensitive material of mq 4 gas sensor is sno 2 which with lower conductivity in clean air.

Arduino mq4 gas sensor review and tutorial with video example. The sensor s output is an analog resistance. This is a sensor that is sensitive to effects of methane. Natural gas lpg.

Structure and configuration of mq 4 gas sensor is shown in above figure configuration a or b sensor composed by micro al 2 o 3 ceramic tube tin dioxide sno 2 sensitive layer measuring electrode and heater are fixed into a crust made by plastic and stainless steel net. You can get this sensor for several. This is a simple to use compressed natural gas cng sensor suitable for sensing natural gas composed of mostly methane ch4 concentrations in the air. Gas sensor with give an voltage output that increases with concentration.

Mq gas sensor type is the most popular gas sensor for hobbyist easy to get and of course very cheap. Mq 4 methane sensor circuit built with an arduino. They can be calibrated but in order to do that a know. Here s the list taken from arduino cc website.

Structure and configuration of mq 4 gas sensor is shown as fig. The methane sensor we will use is the mq 4 sensor. Mq4 gas sensor overview updates. Mq series semiconductor gas sensor application gas leak detection for houses workshops commercial building fire safety detection system.