C​urrently not available for sale, please contact factory.​

Model 480L
Single/Multi-Channel Industrial Ozone Monitor​​​TAPI_480L_OZONE_RSZ.png


094190000B -  MANUAL, USER, 480L.pdf480L Manual8656 KB
ESD Fundamentals - 04786.pdfFundamentals of Electro-Static Discharge (ESD)216 KB
SAL000107B - Industrial Gas Instruments Overview.pdfIndustrial Gas Instruments Overview545 KB
SAL000110C - 480L.pdf480L Specifications1051 KB
SAN20-0005A APPNOTE 480L.pdfMultichannel Stream Selector Option for the 480L Industrial Ozone Monitor213 KB
SAN21-0006A - Sample Conditioning O3 Humidity.pdfSample Conditioning – Ozone in High Humidity Environments206 KB


​​ Measurement Principle
​UV Absorption (Beer-Lambert Law)
​​Measurement Range
​0-1 ppm to 0-500 ppm
ppmv, ppbv, pphm, ug/m3
​​​ Precision / Repeatability
​± 0.5% of full scale
± 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
100-240VAC, 50/60Hz, 74W
 Analog Output
0-5V or 4-20mA isolated output
​​​​ High Current Relay Outputs
     (single-channel only)
SPDT Form C Dry contact, 250VAC/5A
(System OK, Global HI Alarm, Global HI-HI Alarm)
 Multi-stream Signal Outputs
    (3 or 6 channel, 3 per channel)

SPST Dry Contact, 50 VDC, 250mA per output
Stream ID, HI Alarm, HI-HI Alarm

 Status Outputs
Optically isolated Digital Outputs
Sensor OK, Invalid Reading, Pneumatic Error, Check Lamp​
24VDC, 30mA per output
​​​​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)​
​​NEMA 4X - 17.6 lbs (8 kg)
​​​ Stream ID Outputs
Channel 1 through 6​
 Communication Interface
RS-232, RS-485​
WiFi​ (coming soon)
​​​ Approvals                    
 ​​​​Degree of Protection (NEMA)              
IP65 (NEMA 4X)​ 
​​ Warranty
1 year​
​Specifications are subject to change without notice. 
All specifications are based on constant conditions.


  • 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)​


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.​​