APNA-370

APNA-370

Ambient NOₓ Monitor

The APNA-370 provides continuous, high-sensitivity monitoring of ambient NO, NO₂, and NOₓ using a cross-flow modulated chemiluminescence detector. It includes an integrated dry-sampling system, internal ozone generation, and sample drying—enabling low-maintenance operation and reliable, drift-free measurements suited for environmental monitoring and air quality control.


Why Choose APNA-370

  • Highly Sensitive Detection – Monitors NO, NO₂, and NOₓ continuously with ppb-level precision.

  • Stable, Accurate Measurements – Cross-flow modulation enhances repeatability and minimizes interference.

  • Self-Sufficient Sampling System – Includes internal drying, ozone generation, reference control, and built-in pump.

  • Wide Ranges & Auto-Range Support – Covers from ultra-low to mid-range levels with auto/manual range switching.

Why Choose

Technical Specifications of APNA-370

Principle

Cross flow modulation type, reduced pressure chemiluminescence (CLD)

Application

NO2, NO and NOX in ambient air

Range

Standard ranges: 0-0.1/0.2/0.5/1.0 ppm; auto range ~ manual range selectable;
can be operated by remote switching.
Optional (measurable) ranges: 4 ranges selectable from 0-10 ppm, within 10 times range ratio;
auto range ~ manual range selectable; can be operated by remote switching.

Repeatability

±1.0% of F.S.

Linearity

±1.0% of F.S.

Sample gas flow rate

Approx. 0.8L/min

Indication

Measured value, range, alarm, maintenance screen

Alarms

During AIC, zero calibration error, span calibration error, temperature error in converter, etc.

On-screen messages are available in four languages

English, German, French, and Japanese.

Input/output

• 0-1 V/0-10 V/4-20 mA, to be specified (2 systems: either (1) momentary value and integrated or (2) moving average value)
• Contact input/output
• RS-232C

Power

100/110/115/120/220/230/240 VAC, 50/60 Hz (to be specified)

Dimensions

430(W) x 550(D) x 221(H) mm

Mass

Approx. 20 kg,

scrollable

** U.S. EPA designation RFNA-0506-157

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