APNA-370

Ambient NOx Monitor

The APNA-370 continuously monitors atmospheric　NO, NO₂ and NO_x concentrations using a cross-flow modulated semi decompression　chemiluminescence method. The APNA-370 employs an independent, internal dry-method sampling device to achieve the highest levels of sensitivity and accuracy. The dry method, due to its　minimal maintenance requirements and capability　of continuous monitoring and instantaneous　analysis of gas in its unaltered state, has been a preferred method for monitoring the atmospheric pollution.

Segment: Process And Environmental

Division: Ambient

Manufacturing Company: HORIBA, Ltd.

Base product: AP-370 Series

Continuous NO_X, NO, NO₂measurements using a dual cross-flow single chemiluminescence detector and referential calculation.
HORIBA original detector (Silicon photodiode sensor) respond to gas concentration quickly .
Stable, repeatable measurements; Low range: 0-0.1 ppm F.S.
Includes auto-recycle internal drier to make dry air for generating ozone gas
Base configuration includes: O₃ drier unit, O₃ decomposer, reference gas generator and sample pump.

Related Applications

Principle	Cross flow modulation type, reduced pressure chemiluminescence (CLD)
Application	NO₂, NO and NO_X 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,