1.About NDIR CO2 sensor
Our NDIR CO2 sensor has a simple configuration with its infrared radiation source, cell, optical filter and infrared detection part.
The optical filter to detect infrared is composed for 2 kinds of infrared wavelength. One is the wavelength band which is well absorbed by CO2, and the other is the wavelength band which is less affected by CO2 or other gas components.
As it measures the ratio of infrared absorption amount itself, our NDIR CO2 sensor realizes stable measurement performance while compensating the influence of degradation of radiation source etc.
2.Type of Unit
TYPE NAME: CO2 Measurement Unit
MODEL NO.: CO2-4K-3M-P
3.Dimensions
See Fig. 2.
Production Lot No. is put on a Unit.
4.General / Electrical Characteristics
| PARAMETER | SPECIFICATION |
| Outputs |
PWM Open Collector to GND Maximum 5mA |
| Operating Temperature | 0 ~ +40 degrees Celsius |
| Storage Temperature | -20 ~ +50 degrees Celsius |
| Operating Humidity | 0-95% non-condensing |
| Supply Voltage | 5+/-0.5 VDC |
| Current Consumption |
25mA (Average) <100mA (Peak) |
| Connector (3-pin) |
Pin_1 - V+ Pin_2 - V- Pin_3 - PWM Output |
| Connector Type | JST S3B-EH-A(LF) |
| Reverse Polarity Protection | None |
| PARAMETER | SPECIFICATION |
| Type of Measurement | NDIR |
| Measurement Range | 400 4,000ppm CO2 by volume |
| Resolution | < 20ppm CO2 |
| Accuracy | +/-5% FS (+/-200ppm) at 25 |
| Pressure Dependence | 0.13% of reading per mm Hg |
| Response Time | < 3 minutes for a 90% step change |
| Warm Up Time |
< 30 seconds operational <15 minutes full accuracy |
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