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.

Application

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

Features

High sensitivity, high resolution, low power consumption, fast response time
Output method: UART, analog voltage signal
Temperature compensation, excellent linear output
Long lifespan, excellent stability, anti-poisons, anti-vapor interference

Specifications

Table 1. Main Parameters

Model	MH-411D
Detection gas	CO2
Working Voltage	3.6~5VDC (Need to be powered by safety barrier)
Average Current	<85mA
Detection range	0-10%vol Optional (refer Fig2.)
Interface Level	3.0V
Output Signal	UART
Output Signal	0.4~2V (Need to be powered by safety barrier)
Warm-up Time	3 min
Response Time	T90<30s
Working Temperature	-20°C ~60°C
Working Humidity	0~95%RH (no condensation)
Sizes	Φ20 mm×22.2 mm
Weight	35g
Life Time	>5 years
Defense Grade	IP54
Power, communication terminal Intrinsic safety	Ui=7.5VDC，Ii=265mA， Pi=0.5W，Ci=10μF，Li=0mH

Table 2. Measuring Range and Resolution

Target Gas	MeasuringRange	Accuracy	Note
CO2	0~2000 ppm	±(50ppm + 5% of Read Value)	Temperature compensation
	0~6000 ppm		Temperature compensation
	0~1% VOL		Temperature compensation
	0~3% VOL		Temperature compensation
	0~5%VOL		Temperature compensation

* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.

1 PC MH-411D NDIR Infrared CO2 Sensor