APCA-370

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.

Division: Ambient
Manufacturing Company: HORIBA, Ltd.
Base product: AP-370 Series
  • High precision and accuracy in long term
  • Exceptionally low drift by a combination of cross flow modulation and infrared-absorption technology
  • No need for adjustment by optical alignment
  • HORIBA's unique internal reference gas purifier*, which generates CO2-free zero gas and enhances analyzer performance
    * U.S. Patent No. 9962647
ModelAmbient CO2 Monitor
Measurement targetCarbon dioxide (CO2) in ambient air
Measuring principleCross modulation type non-dispersive infrared absorption method
Range0 ppm to 500/1000 ppm
Minimum detection sensitivity0.5 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 rate60 sec or shorter (T90 from the inlet)
Sample collection rateApproximately 0.7 L/min
DisplayMeasured value, alarm, time, alarm history, calibration history, etc.
AlarmsZero calibration, span calibration, etc.

*Ambient temperature change: within 5°C
 

Air Quality Monitoring
Air Quality Monitoring
During the period of rapid economic growth, Japan was burdened with various types of pollution such as water contamination and air pollution. The first step to regain the glow of the sky and the purity of water was analysis. HORIBA's measuring instruments play an active part in various fields to determine, for example, whether established regulations are complied with or whether the air and water are purified properly. The beautiful environment is the world's asset. Going forward, HORIBA will continue contributing to preserving the global environment through measurement.

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