MQ-7 gas sensor has high sensitity to Carbon Monoxide. The sensor could be used to detect different gases contains CO, it is with low cost and suitable for different application.
Model No. | MQ-7 | ||
Sensor Type | Semiconductor | ||
Standard Encapsulation | Plastic | ||
Detection Gas | Carbon Monoxide | ||
Concentration | 10-10000ppm CO | ||
Circuit | Loop Voltage | Vc | ≤10V DC |
Heater Voltage | VH | 5.0V±0.2V AcorDC(High) 1.5V±0.1V ACorDC(Low) | |
Heater Time | TL | 60±1S(High)90±1S(Low) | |
Load Resistance | RL | Adjustable | |
Character | Heater Resistance | RH | 31Ω±3Ω(Room Tem.) |
Heater consumption | PH | ≤350mW | |
Sensing Resistance | Rs | 2KΩ-20KΩ(in 100ppm CO) | |
Sensitivity | S | Rs(in air)/Rs(100ppm CO)≥5 | |
Slope | α | ≤0.6(R300ppm/R100ppm CO) | |
Condition | Tem. Humidity | 20℃±2℃;65%±5%RH | |
Standard test circuit | Vc:5.0V±0.1V; VH(High): 5.0V±0.1V; VH(Low): 1.5V±0.1V | ||
Preheat time | Over 48 hours | ||
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