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Model 480​​​M
Process Ozone Monitor​TAPI_480M_OZONE_RSZ.png


094200000A -  MANUAL, USER, 480M.pdf480M Manual11831 KB
ESD Fundamentals - 04786.pdfFundamentals of Electro-Static Discharge (ESD)216 KB
SAL000107B - Industrial Gas Instruments Overview.pdfIndustrial Gas Instruments Overview545 KB
SAL000109C - 480M.pdf480M Specifications1194 KB
SAN21-0006A - Sample Conditioning O3 Humidity.pdfSample Conditioning – Ozone in High Humidity Environments206 KB


 Measurement Principle UV Absorption (Beer Lambert Law)
 Ranges 0-1,000 ppm to 0-10,000 ppm
0-5 g/Nm3​ to 0-50 g/Nm3
0-1% w/w to 0-3% w/w
 Units % w/w, g/Nm3, ppm
​± 1% of full scale
± 0.5% of full scale
 Display Resolution 1 ppm, 0.001% w/w, 0.01 g/Nm3
 Response Time
< 45 seconds to 95%
Pressure, Temperature
(NTP = 273.15K, 760mmHg)
 Gas Inlet Pressure Range
11.0 - 16.0 psia
 Gas Flow Rate
0.8 LPM
 Temperature Range 5 - 45°C
 Analog Output
0-5V or 4-20mA isolated output
 Status Outputs
Optically isolated Digital Outputs
Sensor OK, Invalid Reading, Check Lamp, Pneumatic Error​
24VDC, 30mA per output
​High Current Relay Outputs
​SPDT Form C Dry contact, 250VAC/5A
​(System OK, HI Alarm, HI-HI Alarm)​
 ​Communication Interface
​RS-232, RS-485​
WiFi (coming soon)
 Power 110-240V, 50/60Hz, 74W
 Dimensions (H x W x D)
NEMA 4X – 17.15” x 15.96” x 6.80” (435.7 mm x 405.4 mm x 172.7 mm)

NEMA 4X – 17.6 lbs (8kg)

​​ Degree of Protection (NEMA)
IP65 (NEMA 4X)
1 year​
​​Specifications are subject to change without notice.
All specifications are based on cons​tant conditions.


  • UV Absorption Method
  • Intuitive graphical user interface
  • Mercury-free UV LED source
  • Ranges 0-1000​​ ppm to 0-10,000 ppm
  • Built-in diagnostics/error logs/warning alarms
  • Modular internal design
  • Minimal zero drift
  • Sample Conditioning System for sampling from humid environments
  • Programmable concentration alarms
  • Temperature and pressure compensation (standard)
  • Ethernet standard, WiFi ​(coming soon)​



The Model 480M is a state-of-the-art medium range ozone monitor. The design has been specifically optimized for applications requiring the measurement of ozone at near-ambient pressure, such as water treatment contactor off-gas measurement. The Model 480M provides accurate and stable readings over long time periods and was designed with the user in mind. The modular design allows for easier field serviceability. The Model 480M is housed in a splash-proof NEMA 4X wall mount enclosure.

The sensor module contained in the Model 480M uses detectors which have a very narrow band of spectral sensitivity, eliminating the need for UV band pass filters which are subject to deterioration by UV or humidity. Two detectors are used: one for the ozone measurement, and the other to compensate for changes in UV source intensity. 

The mercury-free UV LED source in the detection cell makes this process ozone monitor the first of its kind. A self-adjusting pump allows for longer pump life. Improved communication interfaces allow for greater productivity. 

Built-in diagnostics provide warning signals in case operating parameters are out of range. Test values can be viewed while the Model 480M is operating. These displays, warnings, and self-diagnostics, along with the modular design, allow maximum uptime. In addition, any function that can be set or monitored from the front panel can be remotely set or viewed.​