Dissolved Ozone Instruments
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W1 + 480L

Dissolved Ozone Monitor


610-0004-02E MANUAL, W1 ANALYZER.pdfW1 Manual1683 KB
ESD Fundamentals - 04786.pdfFundamentals of Electro-Static Discharge (ESD)216 KB
SAL000107B - Industrial Gas Instruments Overview.pdfIndustrial Gas Instruments Overview545 KB
SAL000112A - W1+480L.pdfW1+480L Specification1308 KB


Measuring Principle Transfer Method (transfer ozone from liquid to gas)
followed by absolute determination​ by UV absorption
Measuring Range  0-1, 0-2 mg/L
​Resolution 0.001 mg/L​
Linearity Better than 99% throughout range
Zero Drift Better than 0.005 ppm per month
Standard Alarms Two ​field programmable alarms accessible via MODBUS Serial or TCP. 
Optional: Form C relay contacts​
​Diagnostic Features Continuous internal diagnostics with error messages and
instrument error signal output​
Analog Outputs 4-20 mA or 0-5 VDC standard
​Communication Interface
RS-232 interface, MODBUS​, Ethernet*, WiFi*
Supply Voltage 100-240 VAC 50/60 Hz, 74W
Water Flow Rate 1.0 LPM (Gravity fed)
Gas Flow Rate 1.0 LPM
Connections  1/4" compression fittings (gas)
1/4" compression or 3/8" barb (water)
Configuration ​NEMA 4X IP65 Wall Mount
Dimensions (HxWxD) M480 Ozone Monitor (NEMA):
16.17” x 15.96” x 6.80“
(410.6 mm x 405.4 mm x 172.7 mm)​
Transfer Column:
39.0" x 15.0" x 4.0"
(991 mm x 381 mm x 102 mm)​
Operating Conditions

5-45°C, 0-95% RH non-condensing

Approvals CE​ pending
Warranty 1 year​

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


  • ​Stripping Column
  • UV Absorption technique
  • Highly stable optical system
  • Microprocessor-based technology
  • Dual field programmable alarms
  • No consumables
  • Reliable, repeatable and accurate​
  • Graphical user interface
  • LED UV lamp
  • Ethernet, WiFi standard (coming soon)


The Model W1, combined with a Model 480L Ozone Monitor, continuously measures dissolved ozone concentrations in the liquid phase. It uses the stripping column method with advanced electronics design to deliver highly accurate and stable readings of dissolved ozone. This dissolved ozone analyzer is typically used in measuring dissolved ozone in drinking water, wastewater and DI water applications in a wide range of industries.​