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Infrared Carbon Dioxide (CO2) Sensor Thermopile Detector - IRC-AT

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• IAQ Range: 0 to 5000ppm
• Temperature Signal : Integral thermistor
• Response Time (t90): < 40 s @ 20°C ambient
• MTBF: > 5 years
• Operating Temperature Range: -20 to +50°C
• Storage Temperature Range: -40 to +75°C
• Humidity Range: 0 to 95% rh non-condensing

Model Number: IRC-AT
Data Sheet:

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Product Specification

IRC-AT Infrared Carbon Dioxide (CO2) Sensor Description
Alphasense CO2 and Methane infrared sensors are supplied in the industry standard miniature (20mm diameter) gas sensor housing.

Patented optics give the best signal to noise ratio of any 20mm diameter NDIR and universal linearisation constants allow easy implementation.

The on-board temperature sensor allows for software compensation, including ideal gas law correction.

CO2
The IRC-AT with dual channel thermopile detector. This CO2 sensor is designed for IAQ, safety, combustion and high CO2 process control applications.

Application notes explain linearisation, temperature compensation and circuitry.

The IRC-AT cover the entire concentration range of measurement, simply implement the appropriate linearisation constants in software for your required range:

IAQ	0 to 5,000ppm CO2
Safety	0 to 5% CO2
Combustion	0 to 20% CO2
Process control	0 to 100% CO2

IRC-AT Infrared Carbon Dioxide (CO2) Sensor PERFORMANCE
Maximum Power Requirements	5.0 VDC, 60 mA max. (50% duty cycle source drive)
Minimum Operating Voltage	2.0 VDC, 20 mA max. (50% duty cycle source drive)
Source Drive Frequency	3 Hz
Active Output in N2 (peak-to-peak)	4 to 7 mV @ 3 Hz, 50% duty cycle
Reference Output in N2 (peak-to-peak)	2 to 5 mV @ 3 Hz, 50% duty cycle
Response Time (t90)	< 40 s @ 20°C ambient
Warm-up Time	To final zero ± 100 ppm: < 30 s @ 20°C
	To specification: < 30 minutes @ 20°C

IRC-AT Infrared Carbon Dioxide (CO2) Sensor LIFETIME
MTBF	> 5 years

IRC-AT Infrared Carbon Dioxide (CO2) Sensor KEY SPECIFICATIONS
Temperature Signal	Integral thermistor (NTC, R 25 = 100KΩ B= 3940 K)
Operating Temperature Range	-20°C to +50°C (linear compensation from 0 to 40℃)
Storage Temperature Range	-40°C to +75°C
Humidity Range	0 to 95% rh non-condensing

TYPE	Range (Application)	Accuracy (%FS, using universal linearisation coefficients)	Zero Resolution (ppm)	Full Scale Resolution (ppm)	Zero Repeatability (ppm)	Full Scale Repeatability (ppm)	Universal lin. coeff. b	Universal lin. coeff. c	Span calibration conc.
IAQ	0 to 5000ppm (IAQ)	1	10	50	± 20	± 50	0.000325	0.9363	4000 ppm
Other	0 to 5 % vol (Safety)	1.5	10	100	± 20	± 500	0.5411	0.6716	4%
	0 to 20 % vol (Combustion)	2.5	10	2000	± 20	± 2500	1.0459	0.2932	16%
	0 to 100 % vol (Process Control)	tbc	10	tbc	± 20	tbc	tbc	tbc	100%