APOA-380 Ozone Monitor

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The APOA-380 Ozone Monitor is an analyzer for measuring ozone in ambient air and other background gases, for air quality control as well as for variety of industrial applications. HORIBA’s state-of-the-art NDUV technology enables high sensitivity and stable real-time continuous measurement.

Ultimate Performance

  • Cross-modulation non-dispersive ultraviolet adsorption technology provides excellent sensitivity, stability and robustness
  • Real-time continuous measurement
  • Wide measurement range with up to 7 ranges selectable, minimum 0-0.1 ppm and maximum 0-10 ppm
  • Enhanced stability and reliability of measurement by utilizing UV LED as a light source
  • Enhanced Lower Detection Limit and response time


User-Friendly Interface & Functionality

  • Durable 7-inch wide color touch screen LCD with intuitive interface and trend graph
  • Selectable metrics (ppb, μg/m3, ppm, mg/m3), response time (moving average value), and calculation method
  • Programmable dilution ratio
  • Dust filter accessible from the front panel for easy daily maintenance

Reduced Operational Expense & Maximum Uptime

  • Remote diagnostics allow fast and effective maintenance
  • Internal parts timer with alarm facilitates timely parts replacement, optimizing parts stock
  • Module design enables easy and fast replacement at field
  • High-quality, long lifetime parts for maximum uptime


 Connected & Intelligent

  • Remote operation from various devices: PC, tablet or smartphone
  • Modbus® TCP and RTU communication
  • USB flash drive for data storage

* Standard specification is wired LAN connection. For wireless connection, separate device is required.


Module Design for Various Needs & Customizations

  • Each standalone module, powered by DC 24 V, is capable of providing measurement results
  • Customizable for stationary, wall mount, mobile or portable installations
  • Easy integration of multiple AP-380 measurement modules into air quality monitoring station or dilution continuous emission monitoring station (CEMS)


Environment-Friendly Design

  • Utilization of UV LED instead of mercury lamp for environmental preservation and easier, timesaving disposal
  • Remote operation reduces emission from transportation, contributing to the reduction of carbon footprint
  • Catalyst free ozone decomposer for reduction of environmental load
  • Long life parts reduce environmental load

APOA-380 Specifications

ComponentOzone (O3)
Measuring principleCross-Modulation Non-Dispersive Ultraviolet Absorption (NDUV)
Measurement range0-0.1/0.2/0.5/1.0/2.0/5.0/10 ppm (up to 7 ranges selectable, auto-range)
Lower Detection Limit (2σ)< 0.3 ppb*1*2
Measurement unitppb, μg/m3, ppm, mg/m3
Sample gas flow rateApprox. 0.6 L/min
Repeatability±1.0% of full scale
Linearity±1.0% of full scale
Zero drift< 0.5 ppb (24 h)
Span drift< 0.5% of full scale (24 h)
Response time (T95)< 60 s from the inlet*2
Display7-inch color LCD with touch panel
CommunicationEthernet × 2 (Modbus® TCP), RS-232C × 1 (Modbus® RTU) , USB flash drive × 1
Analog output (option)Maximum : 3 channels (insulated)
DC 4-20 mA, DC 0-0.1 V, DC 0-1 V, DC 0-5 V or DC 0-10 V
Digital output (option)Relay contact output for range 3 channels, relay contact output for other 6 channels
Digital input (option)Maximum : 4 channels, non-isolated input
Installation environmentOperation temperature : 0-40°C (32°F – 104°F), relative humidity : 85% or less
Temperature and pressure compensationWith
Sampling pump and filterInternal
Power supplyAC 100-240 V±10% (max. voltage: AC 250 V), 50/60 Hz, consumption 80 W
Dimensions, weight430 (W) x 568 (D) x 221 (H) mm, Approx. 15 kg
ComplianceCE, UKCA, KC, FCC, China RoHS

*1 : For ranges less than 1 ppm   *2 : Digital filter
・ If there is other measurement range requirement than shown above, please consult HORIBA
・ Modbus is a trademark of Schneider Electric USA


Dimensional Outline (Unit: mm)


Rear Panel Configuration


1. Exhaust                                    6. I/O terminal block
2. Calibration gas inlet (option)      7. USB flash drive connector
3. Sample gas inlet                        8. Ethernet connector
4. Guide label                                9. RS-232C connector
5. AC power connector

Flow Sheet



▪ I/O terminal block (Analog input/output, digital input/output)
▪ Pressurized calibration unit  ▪ Flow sensor  ▪ USB flash drive
▪ Mounting parts (rubber feet, brackets and slide rails, brackets for slide rails)

APOA-380 brochure




Environmental Protection




O3 – Ozone


Automotive, Bio Energy, Bioprocessing, Chemical, Environmental & water treatment, Fermentations, Fertilizer, Food & Beverages, Forensics, Hospital, Laboratories, Marine, Petrochemical, Pharmaceutical & Bio Pharma, Polymers, Power Plants, Pulp & Paper, Refinery, Security, customs, fire department, drug agencies, Semi-Conductor, Steel Plants, Sterilization, Universities, Waste Water