APOA-370
Ambient Ozone Monitor
The APOA-370 continuously monitors atmospheric ozone concentrations using a cross-flow modulated ultraviolet absorption method. Its internal dry-method sampling device allows direct analysis of unaltered gas with high sensitivity and accuracy, while the heated de-ozonizer reduces interference and moisture, extending UV lamp life. Constructed entirely of inert materials (glass/PTFE), it delivers reliable long-term ambient pollution monitoring with minimal maintenance. Multiple selectable ranges (0–0.1/0.2/0.5/1.0 ppm standard; up to 10 ppm optional) and auto/manual range switching ensure adaptability across environments.
Why Choose APOA-370
- Cross-flow modulated UV absorption detector for precise ozone measurement
- Internal dry-method sampling device for direct, low-maintenance gas analysis
- Heated de-ozonizer removes ozone and moisture while extending UV lamp life
- Inert glass/PTFE sample path preserves sample integrity
- Multiple selectable ranges (0–0.1/0.2/0.5/1.0 ppm standard
- up to 10 ppm optional) with auto/manual switching
- Versatile output interfaces (0–1 V/4–20 mA/RS‑232C) for seamless integration
Key Advantages of APOA-370
High sensitivity
Enables accurate ambient ozone profiling
Range flexibility
0–0.1/0.2/0.5/1.0 ppm
Low maintenance
Reduces service and prolongs lamp life
Seamless integration
Simplifies data acquisition
Applications of APOA-370
Urban air quality monitoring
Continuous ozone trend analysis in city environments
Photochemical smog research
Real-time atmospheric chemistry data
Regulatory compliance
Ozone level reporting for environmental standards
Industrial emissions assessment
Detects ozone by-products in process exhaust
Semiconductor clean room monitoring
Ensures ultra-low ambient ozone levels
Environmental impact studies
Assesses ozone fluctuations in sensitive ecosystems
Technical Specifications of APOA-370
| 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 |
** Certified to U.S. EPA Reference Method EQOA-0506-160
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