Description: 1. The MQ-5 Gas Sensor is a versatile module designed for detecting methane (CNG), propane, and natural gas leaks. It utilizes a heated catalytic sensor element to oxidize the gas molecules and change the resistance of the filament in proportion to the gas concentration. 2. Features a built-in NPN transistor amplifier that amplifies the small output signal from the sensor, making it easier to interface with external devices such as microcontrollers or data loggers without requiring additional amplification circuits. 3. Operates on a 5V DC power supply with an operating temperature range of 0°C to +40°C and a storage temperature range of -20°C to +70°C. It is recommended to maintain the sensor at a stable temperature for optimal performance. 4. Outputs a digital signal (approximately 0.5V) when gas is detected, which can be read by an external microcontroller through a digital input pin. The resistance of the sensing element also decreases as the concentration of the gas increases,
| Specification | Details |
|---|---|
| Gas Sensitivity | Highly sensitive to LEL (Lower Explosive Limit) of methane propane natural gas and other combustible gases |
| Operating Voltage | 3.3V - 5V DC (Typical 5V) |
| Current Consumption | 35mA (Typical) |
| Temperature Range | 0°C to 50°C (Typical) |
| Humidity Range | 20% to 80% RH (Typical) |
| Response Time | 30 seconds |
| Accuracy | ±10% |
| Output Type | Analog voltage signal |
| Detection Gas | Methane Propane Natural Gas |
| Sensitivity Range | Adjustable through potentiometer |
| Sensor Material | Metal oxide semiconductor |
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