Description: 1. MQ-5 is a gas sensor module capable of detecting Hydrogen (H2), Liquified Petroleum Gas (LPG), Methane (CH4), and Carbon Monoxide (CO) gases. It's an analog sensor with a heated filament that reacts to the presence of specific gases, altering its resistance. 2. Design: The compact sensor module has four pins: power (+V), ground (-V), signal output (AO), and heating element control (AG). The module is designed for easy integration with microcontrollers or other electronic systems. 3. Operating Principle: MQ-5 works on the principle of resistance change when exposed to specific gases. When a gas molecule adheres to the filament, the resistance decreases, which can be measured and used as an indication of the gas concentration level. 4. Gas Sensitivity: The sensor is sensitive to different gases, with varying sensitivities: H2 > CO > LPG > CH4. This sensitivity pattern helps in calibrating the sensor for specific gas detection applications. 5. Operating Conditions: Ideal operating
| Specification | Details |
|---|---|
| Sensor Type | High Sensitivity Low Power Consumption |
| Gas Detecting Range | LPG: 100 - 10000 ppm H2: 1000 - 50000 ppm CH4: 1000 - 40000 ppm CO: 0.5 - 30% volume |
| Response Time | About 10 seconds (90%) |
| Operating Voltage | 3.3V to 5V |
| Current Consumption | Typically < 150uA |
| Output Signal | Analog voltage output |
| Sensor Accuracy | ±15% |
| Operating Temperature | -20°C to +50°C |
| Storage Temperature | -40°C to +80°C |
| Humidity Range | 10-80% (non-condensing) |
| Dimensions | 24mm x 17mm x 12mm |
| Weight | Approximately 3 grams |
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