Ambient Analyser CO2

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.

High precision and accuracy in long term: Ensures reliable measurement over extended operation.
Exceptionally low drift via combination of cross-flow modulation and infrared absorption technology.
No need for adjustment by optical alignment.
HORIBA's unique internal reference gas purifier: Generates CO₂-free zero gas and enhances analyzer performance.

Measurement Parameters:

Parameter	Value
Model	Ambient CO₂ Monitor
Measurement Target	Carbon dioxide (CO₂) in ambient air
Measuring Principle	Cross modulation NDIR
Range	0 ppm to 500/1000 ppm
Min. Detection Sensitivity	0.5 ppm (2σ)
Reproducibility	±1.0% of full scale
Linearity	±2.0%
Zero Drift	±0.1 ppm/day, ±2.0 ppm/week
Span Drift	±2.0% FS/day, ±3.0% FS/week
Response Rate	60 sec or shorter (T90 from inlet)
Sample Collection Rate	Approx. 0.7 L/min
Display	Measured value, alarm, time, history, etc.
Alarms	Zero calibration, span calibration, and others