Click to downloadProduct Brochure480l ozone rsz

The Model 480L UV Photometric Ozone Monitor is an extremely stable analyzer, ideal for critical low-level ppm safety and process applications. Its calibration is NIST traceable and the included pressure and temperature compensation ensure high accuracy under all conditions.

​The Model 480L is housed in a splashproof NEMA 4X wall mount enclosure and can be purchased either as a single stream unit or as a multi-channel unit capable of monitoring up to six individual sample streams. The Model 480L has been designed to deliver excellent performance, high reliability and simple operation. The modular design allows for easier field serviceability. Operating parameters can be easily set up in the field using the operator-friendly menu driven software.

​The mercury-free UV LED source in the detection cell makes this process ozone monitor the first of its kind. 

Built-in diagnostics provide warning signals in case operating parameters are out of ​range. Test values can be viewed while the Model 480L is operating. These displays, warnings, and self-diagnostics, along with the modular design, allow maximum uptime. A self-adjusting pump allows for longer pump life. In addition, improved communication interfaces allow for greater productivity. Any function that can be set or monitored from the front panel can be remotely set or viewed.​



  • UV Absorption Method
  • Intuitive graphical user interface
  • Mercury-free UV LED source
  • Built-in diagnostics/error logs/warning alarms
  • Modular internal design
  • Minimal zero drift
  • 1, 3 and 6 stream versions available for safety monitoring
  • Programmable concentration alarms
  • Temperature and pressure compensation (standard)
  • Ethernet standard, WiFi (coming soon)​



Measurement Principle ​UV Absorption (Beer-Lambert Law)
​​Measurement Range ​0-1 ppm to 0-500 ppm
Units ppmv, ppbv, pphm, ug/m3
​​Precision / Repeatability ​± 0.5% of full scale
Accuracy ± 1% of full scale
Lower Detectable Limit 0.003 ppm
Display Resolution 0.001 ppm
Response Time < 30 seconds to 95%
​Zero Drift .005 ppm/month, non-cumulative
(.050 ppm/month Ranges >20 ppm)
Temperature Range 5 - 45°C
Alarm Mode Latching/non-latching, operator selectable
Stream Selector Cycle Time 1 min. to 6 min., operator selectable
Sample Flow Rate 0.8 LPM
Power 100-240VAC, 50/60Hz, 74W
Analog Output 0-5V or 4-20mA isolated output
​​High Current Relay Outputs (included on multi-channel, optional on single-channel) SPST (Form A) Dry Contact, 24VDC, 1 A
(System OK, Global HI Alarm, Global HI-HI Alarm)
Optional Multi-stream Signal Outputs
    (3 or 6 channel, 3 per channel)

Isolated digital output controls
​Stream ID, HI Alarm, HI-HI Alarm

Status Outputs System OK, Invalid Reading, Pneumatic Error, Check Lamp
Dimensions (H x W x D) ​NEMA 4X - 16.17” x 15.96” x 6.80“ (410.6 mm x 405.4 mm x 172.7 mm)​
Weight ​​NEMA 4X - 17.6 lbs (8 kg)
​​Stream ID Outputs Channel 1 through 6​
Communication Interface RS-232
WiFi​ (coming soon)
​​Approvals                     ​CE pending
​​​​Degree of Protection (NEMA)               IP65 (NEMA 4X)​​ 
​Warranty 1 year​

​Specifications are subject to change without notice. 
All specifications are based on constant conditions.



  • Medical, Food and Beverage​
  • Water Treatment​
  • Semiconductor