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Infrared Carbon Dioxide CO2 Gas Sensor - MH-711A

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• Operating voltage: 4.5V~5.5V DC
• Humidity range: 0~95%RH
• Operating voltage: 4.5~5.5V DC
• Current: 120mA
• Range: 0~100%vol range of optional
• Response time T90: <30s
• Temperature range: -40°C ~70°C

Model Number: MH-711A

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Product Specification

MH-711A Infrared CO2 Sensor Application
MH-711A is a common intelligent sensor in small sized to detect CO2 in air taking advantages of non-dispersive infrared principle. It has the advantages of good selectivity, oxygen independence, stable performance and long life. MH-711A is an infrared gas sensor in small sized combining mature technology for infrared absorption detection and micro-machining, superior circuit design closely. The sensor can be widely used in detection for fire disaster, explosive gases.

Explosion Proof: ExmbⅡCT4

MH-711A Infrared CO2 Sensor Characteristics
• High Sensitivity and resolution
• 5V constant power supply, low power consumption
• IIC and 0.4~2V analog voltage signal variety of output
• Fast response and resume
• Temperature compensation and excellent linear output
• Excellent stability
• Long life
• Anti-poisons, anti-vapor interference

MH-711A Infrared CO2 Sensor Working condition
• Operating voltage: 4.5V~5.5V DC
• Temperature range: -40°C ~70°C
• Humidity range: 0~95%RH

MH-711A Infrared CO2 Sensor Technical Data

Operating voltage	4.5~5.5V DC
Current	120mA
Output	IIC 0.4V~2V analog voltage signal
Interface Level	5V
Range	0~100%vol range of optional (Table 2)
Preheat time	90s
Response time T90	<30s
Repeatability	Zero point < ±10ppm
Repeatability	SPAN <±30ppm
Long term drift	Zero point < ±30ppm/month
Long term drift	SPAN < ±30ppm/month
Temperature range	-40°C ~70°C
Humidity range	0~95%RH
Operating life	>5 years
Explosion levels	ExdmⅡCT4
Protection class	IP54

MH-711A Infrared CO2 Sensor Range and resolution

Gas name	Molecular formula	Sensor type	Range	Resolution	Note
Carbon dioxide	CO2	CO2	0~2000ppm	1ppm	Temperature compensation
			0~6000ppm	1ppm	Temperature compensation
			0~1%VOL	1ppm	Temperature compensation
			0~3%VOL	1ppm	Temperature compensation
			0~5%VOL	10ppm	Temperature compensation
			0~10%VOL	10ppm	Temperature compensation
			0~30%VOL	10ppm	Temperature compensation
			0~50%VOL	100ppm	Temperature compensation
			0~100%VOL	100ppm	Temperature compensation