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Infrared Carbon Dioxide (CO2) Sensor Pyroelectric Detector - IRC-A1

• Range: 0-5000ppm, 0-5%vol, 0-20%vol, 0-100%vol
• FS Resolution: 15ppm, 100ppm, 500ppm, 0.5%vol
• Accuracy: 1%FS, 1.5%FS, 2.5%FS, 4%FS
• Response Time (t90): < 40s @ 20°C ambient
• MTBF: > 5 years
• Operating Temperature Range: -20°C to +50°C
• Humidity Range: 0 to 95%rh non-condensing

Model Number: IRC-A1
Data Sheet:

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Product Specification

IRC-A1 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-A1 with dual channel pyroelectric 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-A1 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-A1 Infrared Carbon Dioxide Sensor CO2 sensor PERFORMANCE
Maximum Power Requirements	5.0 VDC, 60mA max. (50% duty cycle source drive)
Minimum Operating Voltage	2.0 VDC, 20mA max. (50% duty cycle source drive)
Source Drive Frequency	1.5 to 3 Hz (recommended 2 to 2.25 Hz)
Active Output in N2 (peak-to-peak)	60 - 100mV @ 2.1 Hz, 50% duty cycle
Reference Output in N2 (peak-to-peak)	40 - 80mV @ 2.1 Hz, 50% duty cycle
Response Time (t90)	< 40s @ 20°C ambient
Warm-up Time	To final zero ± 100ppm < 30 s @ 20°C
Warm-up Time	To specification < 30 minutes @ 20°C

IRC-A1 Infrared Carbon Dioxide Sensor CO2 sensor LIFETIME
MTBF	> 5 years

IRC-A1 Infrared Carbon Dioxide Sensor CO2 sensor KEY SPECIFICATIONS
Temperature Signal	Integral thermistor (NTC, R25 = 3000Ω Β= 3450K)
Operating Temperature Range	-20°C to +50°C (linear compensation from -10 to 40°C)
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	Full Scale Resolution	Zero Repeatability	Full Scale Repeatability
IAQ	0 to 5000ppm (IAQ)	1	1ppm	15ppm	±10ppm	±50ppm
Other	0 to 5 % vol (Safety)	1.5	1ppm	100ppm	±10ppm	±500ppm
	0 to 20 % vol (Combustion)	2.5	1ppm	500ppm	±10ppm	±2500ppm
	0 to 100 % vol (Process Control)	4	1ppm	0.5 % vol	±10ppm	±5000ppm

* When ordering, select 'IAQ' or 'Other', depending on your application.

Matched Transmitter board for IRC-A1 Infrared CO2 Sensor

IRC-TX NDIR CO2 Transmitter Board Features
• Both 4-20mA and USB output
• Uses Alphasense IRC-A1 NDIR cell
• Adjustable bulb voltage to optimise long-term stability vs. resolution

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