
Ambient Carbon Dioxide Monitor
The APCA-370 is a device for continuous CO2 monitoring in ambient air. It uses cross modulation type non-dispersive infrared (NDIR) absorption method. This method employes one cell and one light source for both sample gas and reference gas what allows precise measurement without generation of zero-drift. Due to precise measurement and long term stability in continuous monitoring as well as its minimal maintenance requirements, this method has been a preferred method for monitoring the atmospheric pollution.
Model | Ambient CO2 Monitor |
Measurement target | Carbon dioxide (CO2) in ambient air |
Measuring principle | Cross modulation type non-dispersive infrared absorption method |
Range | 0 ppm to 500/1000 ppm |
Minimum detection sensitivity | 0.5 ppm (2σ) |
Reproducibility (repeating accuracy) | ±1.0% of the full scale |
Linearity (readout error) | ±2.0% |
Zero drift* | ±0.1 ppm/day ±2.0 ppm/week |
Span drift* | ±2.0% of the full scale/day ±3.0% of the full scale/week |
Response rate | 60 sec or shorter (T90 from the inlet) |
Sample collection rate | Approximately 0.7 L/min |
Display | Measured value, alarm, time, alarm history, calibration history, etc. |
Alarms | Zero calibration, span calibration, etc. |
*Ambient temperature change: within 5°C
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