Principle Introduction:
MH-411D infrared gas sensor is a miniature universal intelligent sensor, which adopts NDIR theory to detect concentration of CO2 in air and has good selectivity, stable performance, long life, also is independent of Oxygen. The inside temperature sensor could be used for temperature compensation. This miniature infrared gas sensor is developed by the tight integration of mature infrared absorbing gas detection technology, micro machine workout and superior circuit design.

Applications :
Widely used for HVAC refrigeration,
industrial-process control and safety protection,
agriculture and animal husbandry.

Technical parameters :

Tips:For more parameter information, please refer to the latest manual provided by salesman.

Model	MH-411D-LOW
Detection Gas	CO2
WorkingVoltage	3.6~5VDC(Need to be powered by safety barrier)
Average Current	<30 mA
Detection range	0-10%volOptional(referTable2.)
Interface Level	3.0V
OutputSignal	UART
OutputSignal	0.4~2V(Need to be powered by safety barrier)
Warm-up time	3 min
Response time	T90<30s
WorkingTemperature	-20°C ~60°C
WorkingHumidity	0~95%RH(no condensation)
Sizes	Φ20 mm×22.2 mm
Weight	35g
Lifetime	>5 years
Defense Grade	IP54
Power, communication terminal Intrinsic safety	Ui=7.5VDC，Ii=265mA， Pi=0.5W，Ci=10μF，Li=0mH

Reference Circuit :

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