This Carbon Monoxide (CO) gas sensor detects the concentrations of CO in the air and ouputs 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 5V.

Specifications of MQ7 Gas Sensor:-

• Size: 35mm × 22mm × 18mm
  
• Detection of gas: carbon gas
  
• Heating voltage: 5 ± 0.2V (AC · DC)
  
• Working current: 140mA
  
• Loop voltage: 10V (maximum DC 15V)
  
• Load resistance: 10K (adjustable)
  
• Detection concentration range: 10-1000ppm
  
• Clean air voltage: ≤1.5V
  
• Sensitivity: ≥3%
  
• Response time: ≤1S (preheat 3-5 minutes)
  
• Response time: ≤30S
  
• Element power: ≤0.7W
  
• Working temperature: -10 ~ 50 ℃ (nominal temperature 20 ℃)
  
• Humidity: 95% RH (nominal humidity 65% RH)