APOA-370

Ambient Ozone Monitor

The APOA-370 continuously monitors atmospheric ozone concentrations using a cross flow modulated ultraviolet absorption method. The APOA-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 continuously monitoring and instantaneously analyzing gases in their 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

• Cross-flow modulated ultra-violet absorption detector; Low range: 0-0.1 ppm F.S.
• Heated de-ozonizer removes any O₃ in the reference gas to:
- Reduce interference
- Eliminate moisture interference
- Prolong life-cycle of the UV lamp
• Only inert materials (glass or PTFE) contact sample.

Related Applications

Principle	Non dispersive ultra-violet-absorption method (NDUV)
Application	O₃ 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. 0.7 L/min
Indication	Measured value, range, alarm, maintenance screen
Alarms	During AIC, zero calibration error, span calibration error, temperature error in ozone separator, light intensity error, 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