Description: 1. MQ-7 is a gas sensor module designed specifically for detecting Carbon Monoxide (CO) in various applications, including DIY carbon monoxide detectors and industrial CO monitoring systems. 2. Operating Principle: This sensor utilizes a chemical reaction between the CO gas and a sensitive film coated inside the sensor to produce an electrical output proportional to the concentration of CO present. 3. Sensor Element: The MQ-7 module includes a ceramic heating element, temperature sensor, and the sensitive film coating in a compact, epoxy-sealed housing for durability and protection against moisture and contaminants. 4. Working Temperature: The sensor operates most effectively at temperatures between 25°C and 60°C (77°F to 140°F). Prolonged exposure to temperatures below 0°C or above 85°C may impact performance. 5. Output Signal: When exposed to CO gas, the sensor generates an analog resistance value that can be read and converted to a digital signal using appropriate electronics.
| Specification | Details |
|---|---|
| Sensor Type | CO (Carbon Monoxide) gas sensor |
| Operating Voltage | 5V DC |
| Current Consumption | 50mA (typical) |
| Sensitivity Range | 100-2000 ppm (parts per million) |
| Response Time | 10-30 seconds |
| Stability | ±3% in a year |
| Temperature Range | -20°C to 50°C |
| Humidity Range | 10-90% relative humidity |
| Output Pin | Analog voltage output (0-5V) |
| Size and Weight | approximately 3.5 x 1.7 cm 30g |
| Material | Plastic and metal |
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