Description: 1. The MQ-4 Natural Gas Sensor Module is an electronic component designed for detecting methane (CH4) or natural gas in various applications, including methane-based CNG (Compressed Natural Gas) systems, gas leak detection, and air quality monitoring. 2. Key Features: This module incorporates a high sensitivity MQ-4 gas sensor element, capable of detecting methane concentrations from 50ppm to 5000ppm with an accuracy of ±10%. It operates on a working voltage range of 3.3V to 5.5V DC and has a low power consumption of around 20mA. 3. Sensing Principle: The MQ-4 module employs the principle of conductometric sensing, where a change in resistance within the gas sensor element occurs when methane comes into contact with the catalytic sensing material (Tin Oxide) present on the sensor's surface. 4. Interface and Connectivity: The MQ-4 module features analog output, making it easy to interface with various microcontrollers, development boards, or data loggers via a simple voltage divider
| Specification | Details |
|---|---|
| Sensitivity | Methane (CH4): 200 - 1000 ppm |
| Operating Temperature | -20°C to +50°C |
| Humidity Range | 10% to 90% RH |
| Power Supply | DC 5V typically with a voltage regulator |
| Current Consumption | Typically around 140-150 mA |
| Response Time | Approximately 20-30 seconds |
| Accuracy | ±10% relative accuracy |
| Calibration | Factory calibrated user-adjustable |
| Operating Mode | Analog output (0 - 5V) |
| Sensor Type | Metal oxide semiconductor |
| Dimension | Typically around 28x18x13 mm |
| Weight | Approximately 20-30 grams |
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