MQ-7 Carbon Monoxide Coal Gas Sensor Module

MQ-7 Carbon Monoxide Sensor Module detects the concentrations of CO in the air and outputs its reading as an analog voltage. The sensor can measure concentrations of 10 to 10,000 ppm.The sensor can operate at temperatures from -10 to 50°C and consumes less than 150 mA at 5 V.

     This MQ-7 Carbon Monoxide Sensor provides both digital and analog outputs. Threshold level for digital output can be easily adjusted using the preset on the board. MQ-7 sensor module can be easily interfaced with Micro-controllers, arduino and etc.

Electrical properties:

• Input voltage: DC5V power (current): 150mA
• DO output: TTL digital 0 and 1 (0.1 and 5V)
• AO output :0.1-0 .3 V (relatively clean), the highest concentration of voltage around 4V
• Heater voltage: 5±0.2V（AC•DC)
• Working temperature: -10~50℃ (nominal temperature: 20℃)
• Working humidity: 95%RH (nominal humidity: 65%RH)
• Loading resistance: 10K (adjustable)
• Sensitivity: ≥3% and Response time: ≤1S (preheating 3-5 minutes) and Component power consumption: ≤0.7W and Dimension: 35mm×20mm×11mm