Semiconductor C2H6O gas sensor – MQ3 Ethanol sensor


Semiconductor C2H6O gas sensor Introduction

Semiconductor C2H6O gas sensor is a kind of gas sensor that uses semiconductor detection principle to detect the concentration of ethanol gas in the air. It adopts advanced production technology, the solid metal oxide semiconductor material as the sensor gas sensitive material, when the sensor is in the environment of ethanol gas, the conductivity of the alcohol sensor increases with the increase of the concentration of ethanol gas in the air. when a simple circuit is used to convert the change in electrical conductivity into an output signal corresponding to the concentration of ethanol gas.

Semiconductor C2H6O gas sensor

Semiconductor C2H6O gas sensor Features

1, the machine is small in size, light in weight, easy to install, can be mounted in portable, fixed, pipe type and other appearance sensors used.

2, stainless steel protective net, high protection, easy to clean effective protection from particulate matter and impurities, easy to maintain and use.

3, high-performance chip and breakthrough manufacturing process, product performance significantly improved.

4, when long service life, low cost, simple driving circuit.

5, when high resolution, high sensitivity, fast response speed, strong anti-interference force.

Ethanol sensor

Semiconductor C2H6O gas sensor Parameters

Product model: MQ-3

Product type: semiconductor gas sensor

Standard package: Plastic seal

Detection gas: ethanol

Detection concentration: 25-500ppm

Loop voltage: <24V DC

Load resistance: adjustable

Temperature/humidity: 20°C, 2°C; 55% soil 5%RH


1. Avoid exposure to volatile silica vapors.

2, avoid sensor exposure to high concentration of corrosive gas.

3, avoid alkali, alkali metal salt, halogen pollution.

4, avoid the sensor contact with water or immersed in water, easy to cause the sensor sensitivity characteristics decline.

5, avoid applying too high voltage, if the voltage applied to the sensor heating is higher than the specified value, even if the sensor has not received physical damage or damage, it will cause damage to the lead/or heater, and cause the sensor sensitive characteristics to decline.


What is ethanol gas?

ethanol is an organic compound with the simplified structure of CH₂OH or C₂H₅OH and the molecular formula of C₂H₆O and commonly known as alcohol. Ethanol at normal temperature and pressure is a volatile colorless transparent liquid, low toxicity, pure liquid can not be directly drunk. The aqueous solution of ethanol has the aroma of wine, and slightly pungent, sweet taste. Ethanol is flammable and its vapour can form an explosive mixture with air.

What is an ethanol gas sensor?

Ethanol gas sensors, also known as alcohol gas sensors, are useful for traffic police to detect drunk driving and can be used in other places where alcohol is prohibited. With the rapid development of sensor technology, the use of ethanol gas sensor is more and more practical, and the detection effect is more accurate.

What are the long-term hazards of inhaling ethanol gas?

Long-term inhalation of ethanol gas will lead to nutritional metabolic disorders, liver cirrhosis, osteoporosis and so on. Long-term inhalation of ethanol gas is harmful to human body. Because of long-term inhalation ethanol can lead to some nutritional metabolism disorders in the body, such as calcium will be lost, calcium deficiency in the human body, and then the formation of hypocalcemia, and even cause osteoporosis, easy to induce fracture. In addition, the body’s main organ for ethanol metabolism is the liver. Long-term inhalation of ethanol will increase the metabolic burden of the liver, cause alcoholic liver, even fatty liver, damage liver function, and even lead to liver cirrhosis and primary liver cancer.


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