1db MQ-2 füstgáz PB-bután hidrogéngáz érzékelő érzékelő modul Arduinohoz
1pcs MQ-2 Smoke Gas LPG Butane Hydrogen Gas Sensor Detector Module For Arduino
Introduction to MQ-2 sensor:
The gas-sensitive material used in the MQ-2 gas sensor is tin dioxide (SnO2) with low conductivity in clean air. When there is combustible gas in the environment where the sensor is located, the conductivity of the sensor increases with the increase of the combustible gas concentration in the air. Using a simple circuit, the change in conductivity can be converted into an output signal corresponding to the gas concentration. MQ-2 gas sensor has a high sensitivity to liquefied gas, propane, and hydrogen, and it is also ideal for the detection of natural gas and other combustible vapors. This sensor can detect a variety of flammable gases and is a low-cost sensor suitable for a variety of applications.
Module application:
It can be used for gas leakage monitoring devices in homes and factories, and is suitable for the detection of liquefied gas, butane, propane, methane, smoke, etc.;
Module features:
1. Adopt high-quality double-panel design, with power indication and TTL signal output indication;
2. With doing switch signal (TTL) output and AO analog signal output;
3. TTL output valid signal is low level. (The signal light is on when the output is low, and it can be directly connected to the single-chip microcomputer or relay module)
4. The higher the concentration of analog output voltage, the higher the voltage.
5. It has good sensitivity to liquefied gas, natural gas, city gas, and smog.
6. There are four screw holes for easy positioning;
7. Product dimensions: 32(L)*20(W)*22(H)
8. It has a long service life and reliable stability
9. Fast response and recovery characteristics
Electrical performance:
Input voltage: DC5V Power consumption (current): 150mA
DO output: TTL digital quantity 0 and 1 (0.1 and 5V)
AO output: 0.1-0.3V (relatively pollution-free), the highest concentration voltage is about 4V
Special reminder: After the sensor is powered on, it needs to be warmed up for about 20S to stabilize the measured data. It is normal for the sensor to heat up, because there is a heating wire inside, if it is hot, it will not be normal.
Wiring:
1. VCC: Connect to the positive pole of the power supply (5V)
2. GND: connect to the negative pole of the power supply
3. DO: TTL switch signal output
4. AO: analog signal output
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