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NDIR CO2 Sensor

NDIR CO2 Sensor
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Figure 1 NDIR-A Schematic Diagram Top ViewBottom ViewSide View > All dimensions in millimetres ( 0.1mm) Pin out details: Notes: 1. Lamp return.2. Lamp +5V. 3. +5V Pyro supply. 4. Detector output. 5. Reference output. 6. Thermistor output. 7. OV Pyro supply and case connection. 1. Dimensions without tolerances are nominal.2. Recommended PCB socket: Wearnes Cambion Ltd. code: 450-3326-01-06-00 3. Weight: 15g. 4. Use antistatic precautions when handling. 5. Do not cut pins.6. Do not solder directly to pins. PERFORMANCE Maximum Power Requirements5.0 VDC, 60mA max. (50% duty cycle source drive)Minimum Operating Voltage3.0 VDC (50% duty cycle source drive)Source Drive Frequency1.5 to 3 Hz (recommended 2 to 2.25 Hz) Active Output in N > 2 (peak-to-peak)25 mV typical @ 2.1 Hz, 50% duty cycleReference Output in N > 2 (peak-to-peak)22 mV typical @ 2.1 Hz, 50% duty cycleResponse Time (t > 90 )< 40s @ 20ѰC ambientWarm-up TimeTo final zero 100ppm: < 30 s @ 20ѰCTo specification: < 30 minutes @ 20C LIFE TIME MTBF> 5 years KEY SPECIFICATIONS Temperature SignalIntegral thermistor (NTC, R > 25 = 3000 Й, B = 3450 K)Operating Temperature Range-20C to +50аC (linear compensation from -10 to 40C)Storage Temperature Range-40аC to +75C (-40аF to 167F)Humidity Range0 to 95% rh non-condensing > TTTTTececececechnical Specifhnical Specifhnical Specifhnical Specifhnical Specificaicaicaicaicationtiontiontiontion NOTE: all sensors are tested at ambient environmental conditions, unless otherwise stated. As applications of use are outside our control, the information provided is givenwithout legal responsibility. Customers should test under their own conditions, to ensure that the sensors are suitable for their own requirements. Alphasense Ltd, Sensor Technology House, 300 Avenue West, Skyline 120, Great Notley. CM77 7AA. UKTelephone: +44 (0) 1376 556 700 Fax: +44 (0) 1376 335 899 E-mail: sensors@alphasense.com Website: www.alphasense.com size="-2">

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Range 0 to 2000 ppm0 to 5 % vol0 to 20 % vol0-100 % vol Resolution 2.5 ppm50 ppm250 ppm0.2 % vol Accuracy (20 C) б 10 ppm 0.5 % FSѱ 1.5 % FS 3 % FS Zero Repeatability ѱ 10 ppm 50 ppmѱ 200ppm 0.2 % FS FS Repeatability ѱ 50 ppm 250 ppmѱ 1000 ppm 0.2 % FS > TTTTTececececechnical Specifhnical Specifhnical Specifhnical Specifhnical Specificaicaicaicaicationtiontiontiontion For further information on the performance of this sensor, on other sensors in the range or any other subject, pleasecontact Alphasense Ltd. For Application Notes visit www.alphasense.comӔ. > In the interest of continued...

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Typical response from 0 to 5000 ppm CO > 2 . The fit is very close to the theoretical curve, predictedby the Beer-Lambert Law. > Temperature compensation corrects for temperature error in the detector. Best compensationincludes both span and zero correction; span correction can be a universal correction, but zero temperaturecorrection will vary with each cell. The graph above shows error at 5,000 ppm CO > 2 . > TTTTTececececechnical Specifhnical Specifhnical Specifhnical Specifhnical Specificaicaicaicaicationtiontiontiontion For further information on the performance of this sensor, on...

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Custom linearisation is not necessary with the IRC-A1. Using universal linearisation constants,repeatability between cells is very good, allowing easier implementation. For an IAQ application, a zero and thensingle calibration at 1,600ppm CO > 2 gives the error shown above: less than 2% of reading and typically less than0.5% of reading for six different IRC-A1 cells. > Excellent stability and resolution at 1000ppm CO > 2 for the IRC-A1 is achieved by better design, notby using more expensive components. > TTTTTececececechnical Specifhnical Specifhnical Specifhnical Specifhnical...

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