[shortdesc]
Application:Widely used for HVAC refrigeration, air monitoring indoor, industrial process control and safety protection,agriculture and animal husbandry.
Feature:High sensitivity, high resolution, fast response,Temperature compensation, excellent linear output
[/shortdesc]
Production Description:
MH-440D infrared gas sensor is a miniature universal intelligent sensor, which adopts NDIR theory to detect concentration of CH4/C3H8 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.
It is convenient in use and also instead of catalytic component directly, widely used in various occasions with flammable and explosion hazard gas.
Feature:

High sensitivity, high resolution, fast response
Output method: UART, analog voltage signal
Temperature compensation, excellent linear output
Excellent stability, Long lifespan
Anti-poisons, anti-vapor interference
Can replace catalytic type gas sensor directly

Application:
Widely used for HVAC refrigeration, air monitoring indoor, industrial process control and safety protection,agriculture and animal husbandry.

Main technical parameters:

Detection Gas	Propane (C3H8)
WorkingVoltage	3.6~5VDC (Need to be powered by safety barrier)
Average Current	＜85mA
Interface Level	3.0V
Detection range	0~2.00%vol (0-100%LEL)
OutputSignal	UART(3.0V)
OutputSignal	0.4~2.0VDC
Warm-up time	3 min
Response time	T90<30s
WorkingTemperature	-20°C ~ 60°C
WorkingHumidity	0~95%RH(no condensation)
Sizes	Φ20×22.6mm
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

Detection Gas	Methane (CH4)
WorkingVoltage	3.6~5.0VDC (Need to be powered by safety barrier)
Average Current	＜85mA
Interface Level	3.0V
Detection range	0~10%vol(selectable, refer fig2.)
OutputSignal	UART(3.0V)
OutputSignal	0.4~2.0VDC
Warm-up time	3 min
Response time	T90<30 seconds
WorkingTemperature	-20°C ~ 60°C
WorkingHumidity	0~95%RH(no condensation)
Sizes	Φ20×22.6mm
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

2 pcs MH-440D NDIR Infrared CH4 Sensor C3H8 Sensor