ماژول سنسور تشخیص دود و گاز MQ-2

Sensors are the electronic devices used for interaction with the outer environment. MQ2 gas sensor is an electronic sensor used for sensing the concentration of gases in the air such as LPG, propane, methane, hydrogen, alcohol, smoke and carbon monoxide. MQ2 gas sensor is also known as chemiresistor. It contains a sensing material whose resistance changes when it comes in contact with the gas. 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.

Features:
1. High-quality dual-panel design, and having a TTL signal power indication output instruction;
2. With DO switch signal (TTL) output and AO analog signal output;
3. TTL output valid signal is low level. (When the output is low, the signal light is on, it can be directly connected to the MCU or relay module.)
4. The analog output voltage is higher with the higher the voltage.
5. Good sensitivity to liquefied gas, natural gas, city gas, and smoke.
6. There are four screw holes for easy positioning;
7. Size: 32 x 20 x 22mm
8. With long-term service life and reliable stability
9. Fast response recovery characteristics

Electrical performance:
Input voltage: 5V, DC
current : 150mA
DO output: TTL digital quantity 0 and 1 (0.1 and 5V)
AO output: 0.1 ~ 0.3V (relatively non-polluting), the highest concentration voltage is about 4V
Module Application:
They are used in gas leakage detecting equipments in family and industry, are suitable for detecting
of LPG, i-butane, propane, methane ,alcohol, Hydrogen, smoke