MQ-7 Carbon Monoxide Sensor

1,000.00 Br

  • Detection of concentration 10-1000ppmCO
  • Loop voltage: 10V DC
  • Heater voltage: 5V±0.2V ACorDC(high), 1.5V±0.1V ACorDC(low)
  • Load resistance: adjustable
  • Heating resistor: 31±3(indoor temperature)
  • Heating dissipation: 350mW
  • Sensitive part surface resistance: 2K-20K
  • Sensitivity: Rs(in air)/Rs(100ppmCO)5
  • Concentration gradient: 0.6
  • Temperature, humidity: 20±2, 65%±5%RH
  • Standard test circuit: Vc: 5v ±0.1v, Vh(high): 5v ±0.1v, Vh(low): 1.5v ±0.1v
  • Good sensitivity to Combustible gas in wide range High sensitivity to Natural gas Long life and low cost Simple drive circuit MQ-7 gas sensor has high sensitivity to Carbon Monoxide.
  • This is a simple to use Carbon Monoxide (CO) sensor, suitable for sensing CO concentrations in the air. The MQ-7 can detect CO-gas concentrations anywhere from 20 to 2000ppm.
  • This sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC.
  • The main chips: the LM393, the MQ-7 CO sensor
  • The working voltage: DC 5 V
  • Dual signal output (analog output, and TTL level output)
  • The effective signal of  TTL output is low level . (when Output low level ,the signal light on.can directly connected to the MCU)
  • Analog output 0 to 5V voltage, the higher the concentration ,the higher the voltage.
  • Has a high sensitivity and good selectivity to carbon monoxide .
  • Long life and reliable stability
  • Size: 32mm x22mm x27mm

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