Carbon Dioxide Infrared Sensor - MSH-CO2

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▪ High sensitivity to carbon dioxide
▪ Gas diffusion sampling
▪ Standard sensor size
▪ Temperature compensated detector elements
▪ Fast Response
▪ Wide operating temperature range

Model Number: MSH-CO2
Data Sheet:

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Product Specification

DESCRIPTION

Dynament infrared sensors operate by using the NDIR principle to monitor the presence of target gas. The sensor

contains a long life tungsten filament infrared light source, an optical cavity into which gas diffuses, a dual temperature

compensated pyroelectric infrared detector and an integral thermistor to monitor the internal temperature. The infrared

source should be driven externally with a constant voltage supply switched at a fixed frequency with a 50% duty cycle.

The dual pyroelectric detector produces two output signals in response to pulsed incident radiation from the source:

• An active signal which decreases in the presence of target gas

• A reference signal which is used to monitor the intensity of the source

FEATURES

▪ High sensitivity to carbon dioxide

▪ Gas diffusion sampling

▪ Standard sensor size

▪ Temperature compensated detector elements

▪ Fast Response

▪ Wide operating temperature range

▪ Internal temperature signal

▪ Low power

SPECIFICATION

Maximum lamp Power Requirements:	5V d.c. 60mA max. (50% duty cycle source drive)
Minimum operating voltage:	3.0V d.c. (50% duty cycle source drive)
Source drive frequency:	2.0Hz minimum, 3.0 Hz typical, 4.0 Hz maximum
Active mV pk-pk output in N₂:	5.2mV typical @ 3Hz, 50% duty cycle
Reference mV pk-pk output in N₂:	4.0mV typical @ 3Hz, 50% duty cycle
Sensitivity (reduction in active signal) at 20℃, 3Hz, 50% duty cycle:	14% typical @ 5000ppm CO₂ 30% typical @ 2.0% volume CO₂
Measuring range:	0 -1000ppm up to 0 - 5% volume CO₂
Resolution:	1% of measuring range
Warm up time:	To final zero ± 100ppm : <20s @20°C (68°F) ambient To specification: < 30 minutes @20°C (68°F) ambient
Response Time T₉₀:	<30s @20℃ (68°F) ambient
Zero Repeatability:	±50ppm @20℃ (68°F) ambient
Span Repeatability:	±50ppm @20℃ (68°F) ambient
Long term zero drift:	±50ppm per month @20℃ (68°F) ambient
Operating temperature range:	-20℃to +50℃(-4°F to 122°F)
Storage temperature range:	-20℃ to +50℃ (-4°F to 122°F)
Humidity range:	0 to 95% RH non-condensing.
MTBF:	> 5 years
Temperature signal:	Integral thermistor for temperature monitoring
Weight:	17 grams