MQ Series Gas Sensor

Gas sensors (also known as gas detectors) are electronic devices that detect and identify different types of gasses. They are commonly used to detect toxic or explosive gasses and measure gas concentration. Gas sensors are employed in factories and manufacturing facilities to identify gas leaks, and to detect smoke and carbon monoxide in homes.

Gas sensors vary widely in size (portable and fixed), range, and sensing ability. They are often part of a larger embedded system, such as security systems, and they are normally connected to an audible alarm or interface. Because gas sensors are constantly interacting with air and other gasses, they have to be calibrated more often than many other types of sensors. 

Here are some MQ series of gas sensors

• MQ-2 - Methane, Butane, LPG, smoke
• MQ-3 - Alcohol, Ethanol, smoke
• MQ-4 - Methane, CNG Gas
• MQ-5 - Natural gas, LPG
• MQ-6 - LPG, butane gas
• MQ-7 - Carbon Monoxide
• MQ-8 - Hydrogen Gas
• MQ-9 - Carbon Monoxide, flammable gasses
• MQ131 - Ozone
• MQ135 - Air Quality (CO, Ammonia, Benzene, Alcohol, smoke)
• MQ136 - Hydrogen Sulfide gas
• MQ137 - Ammonia
• MQ138 - Benzene, Toluene, Alcohol, Acetone, Propane, Formaldehyde gas, Hydrogen
• MQ214 - Methane, Natural gas