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Rp15.500
MQ-2 MQ2 Gas Leakage LPG Combustible Gas Smoke Detection Sensor
Rp15.500
- Kondisi: Baru
- Min. Pemesanan: 1 Buah
- Etalase: COM o Sensor
MQ-2 gas sensor module has high sensitive to LPG, Propane and Hydrogen, also could be used to Methane and other combustible steam, it is with low cost and suitable for different application.
The MQ2 sensor is one of the most popular sensors in the MQ family. It is a type of MOS (Metal Oxide Semiconductor) sensor. These kinds of sensors are also called chemiresistors because they work by changing their electrical resistance when they come into contact with certain gases.
How Does a Gas Sensor Work?When you turn on an MQ2 gas sensor, it starts heating up its internal Tin Dioxide (SnO₂) semiconductor layer to a high temperature. At this high temperature, oxygen molecules from the air stick (or adsorb, if you prefer the technical term) to the surface of the Tin Dioxide. These adsorbed oxygen molecules pull free electrons away from the Tin Dioxide, which creates an “electron depletion region” near the surface. This makes the Tin Dioxide highly resistant to electrical flow, so only a small amount of electric current can pass through it.
When combustible gases enter the sensor, they react with the oxygen molecules that are stuck to the Tin Dioxide surface. This chemical reaction releases the electrons that were being held by the oxygen. As these electrons return to the Tin Dioxide, the electron depletion region gets smaller. This reduces the resistance, allowing electricity to flow much more easily through the sensor.
The MQ2 sensor works by detecting these changes in electrical resistance. The more flammable gas there is, the more oxygen molecules react, and the more the resistance decreases. This makes it easier for microcontrollers connected to the sensor to detect both the presence and the concentration of gas in the air.
Calibrating the MQ2 Gas SensorSince the MQ2 sensor is a heater-driven sensor, it needs special preparation before it can work correctly.
If you haven’t used your MQ2 sensor for more than a month, you’ll need to warm it up for 24 to 48 hours. This long warm-up period is necessary because the sensor needs time to reach its normal working condition after sitting unused for so long.
However, if you’ve used your sensor recently, you only need to warm it up for 5 to 10 minutes before using it again.
When you first turn on the sensor during the warm-up time, it might give you wrong readings. Don’t worry! As the sensor heats up and becomes stable, the readings will become more accurate.
Specification
Working Gas: Carbon Monoxide, LPG, Alcohol/ Ethanol, Propane, Hydrogen, Methane, and Butane
Working voltage: DC 5V
DOUT: TTL output
AOUT: Analog output
Preheat time: Over 20s.
The MQ2 sensor is one of the most popular sensors in the MQ family. It is a type of MOS (Metal Oxide Semiconductor) sensor. These kinds of sensors are also called chemiresistors because they work by changing their electrical resistance when they come into contact with certain gases.
How Does a Gas Sensor Work?When you turn on an MQ2 gas sensor, it starts heating up its internal Tin Dioxide (SnO₂) semiconductor layer to a high temperature. At this high temperature, oxygen molecules from the air stick (or adsorb, if you prefer the technical term) to the surface of the Tin Dioxide. These adsorbed oxygen molecules pull free electrons away from the Tin Dioxide, which creates an “electron depletion region” near the surface. This makes the Tin Dioxide highly resistant to electrical flow, so only a small amount of electric current can pass through it.
When combustible gases enter the sensor, they react with the oxygen molecules that are stuck to the Tin Dioxide surface. This chemical reaction releases the electrons that were being held by the oxygen. As these electrons return to the Tin Dioxide, the electron depletion region gets smaller. This reduces the resistance, allowing electricity to flow much more easily through the sensor.
The MQ2 sensor works by detecting these changes in electrical resistance. The more flammable gas there is, the more oxygen molecules react, and the more the resistance decreases. This makes it easier for microcontrollers connected to the sensor to detect both the presence and the concentration of gas in the air.
Calibrating the MQ2 Gas SensorSince the MQ2 sensor is a heater-driven sensor, it needs special preparation before it can work correctly.
If you haven’t used your MQ2 sensor for more than a month, you’ll need to warm it up for 24 to 48 hours. This long warm-up period is necessary because the sensor needs time to reach its normal working condition after sitting unused for so long.
However, if you’ve used your sensor recently, you only need to warm it up for 5 to 10 minutes before using it again.
When you first turn on the sensor during the warm-up time, it might give you wrong readings. Don’t worry! As the sensor heats up and becomes stable, the readings will become more accurate.
Specification
Working Gas: Carbon Monoxide, LPG, Alcohol/ Ethanol, Propane, Hydrogen, Methane, and Butane
Working voltage: DC 5V
DOUT: TTL output
AOUT: Analog output
Preheat time: Over 20s.
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