• MH-Z14A CO2 SENSOR

MH-Z14A NDIR CO2 SENSOR FOR CARBON DIOXIDE DETECTION

  • • Detection Range: 0~5%VOL optional
  • • Working Voltage: 4.5 V ~ 5.5V DC
  • • Output Signal: UART, analog voltage signal, PWM wave

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Principle Introduction:

MH-Z14A NDIR Infrared gas module is a common type, small size sensor, using non-dispersive infrared (NDIR) principle to detect the existence of CO2 in the air, with good selectivity, non-oxygen dependent and long life. Built-in temperature compensation; and it has digital output, analog voltage output, and PWM output. This commons type infrared gas sensor is developed by the tight integration of mature infrared absorbing gas detection technology, precision optical circuit design and superior circuit design.

Applications :
 HVAC refrigeration equipment, air quality monitoring equipment, fresh air system, air purification equipment, smart home, and schools.
Technical parameters :
Working voltage 4.5 V ~ 5.5V DC
Average current <60mA(@5V input)
Peak current 150 mA(@5V input)
Interface level 3.3 V(5V compatible)
Measuring range 0~10000ppmoptional(refer to table 2)
Output signal Serial Port (UART, TTL level)
PWM
Analog output(DAC), 0.4-2V
Preheat time 3min
Response Time T90<120s
Working temperature 0℃ ~ 50℃
Working humidity 0~90%RH(no condensation)
Weight 15g
Lifespan >5 year

Target Gas Measuring Range Accuracy
Carbon Dioxide (CO2) 0~2000ppm ±(50ppm +3%reading value)
0~5000ppm
0~10000ppm ±10% reading value
Reference Circuit :
 

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