Contents
How does MQ2 sensor work?
MQ2 is a metal oxide semiconductor type gas sensor. Concentrations of gas in the gas is measured using a voltage divider network present in the sensor. This sensor works on 5V DC voltage. It can detect gases in the concentration of range 200 to 10000ppm.
What is an MQ2 smoke sensor?
The MQ-2 is a smoke and combustible gas sensor from Winsen. It can detect flammable gas in a range of 300 – 10000ppm. It’s most common use is domestic gas leakage alarms and detectors with a high sensitivity to propane and smoke.
What is MQ2 gas sensor module?
MQ2 gas sensor can be used to detect the presence of LPG, Propane and Hydrogen, also could be used to detect Methane and other combustible steam, it is low cost and suitable for different application. Sensor is sensitive to flammable gas and smoke.
What are MQ sensors?
Introduction. MQ gas sensors are a family of sensors which are used to detect a wide variety of gases like alcohol, smoke, methane, LPG, hydrogen, NH3, Benzene, Propane etc. These sensors are made up of electrode which is coated with a sensing material, and it is heated to make it more reactive and sensitive.
What is the working principle of gas sensor?
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 use a MQ 2 sensor?
Connect your MQ2 sensor with the Arduino as shown in the above diagram.
- Connect the VCC pin of the sensor to the 5V of the Arduino.
- Connect the GND of the sensor to the GND of the Arduino.
- Connect the digital pin of the sensor D0 to the digital pin number 8 of the Arduino.
How do you use MQ 2?
Which gas sensor is best?
Open Path Infrared (OPIR) Industrial Gas Sensors They can monitor in both LIL-m and ppm-m ranges to detect both large and small gas leaks. This type of industrial gas detector works best with hydrocarbon gases, silicones, hydride gases, or halogenated hydrocarbons that may be found in large, open areas.
Where to use the MQ-2 gas sensor?
Where to use MQ-2 Gas sensor: The MQ-2 Gas sensor can detect or measure gasses like LPG, Alcohol, Propane, Hydrogen, CO and even methane. The module version of this sensor comes with a Digital Pin which makes this sensor to operate even without a microcontroller and that comes in handy when you are only trying to detect one particular gas.
How is the concentration of gas measured in mQ2?
This change in the value of resistance is used for the detection of gas. MQ2 is a metal oxide semiconductor type gas sensor. Concentrations of gas in the gas is measured using a voltage divider network present in the sensor.
How does a gas sensor work on a microcontroller?
Read the analog values (0-5V) using a microcontroller, this value will be directly proportional to the concentration of the gas to which the sensor detects. You can experiment with this values and check how the sensor reacts to different concentration of gas and develop your program accordingly.
Are there any sensors that can detect smoke?
There are various types of sensors available that can detect light, noise, smoke, proximity etc… With the advent in technology, these are available as both analog and digital forms. Besides forming a communication with the outer environment, sensors are also a crucial part of safety systems.