Dissolved Ozone Instruments
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W1 + 465L

Dissolved Ozone Monitor

W1 + 465L NEMA.png


  • Stripping Column

  • UV Absorption technique

  • Highly stable optical system

  • Microprocessor based technology

  • Dual field programmable alarms

  • No consumables

  • Reliable, repeatable and accurate


​Maintenance section coming soon. 




465L Manual - 05509.pdf465L Manual932 KB
610-0004-02E MANUAL, W1 ANALYZER.pdfW1 Manual1683 KB
ESD Fundamentals - 04786.pdfFundamentals of Electro-Static Discharge (ESD)216 KB
SAL000097C - W1 + 465L.pdfW1 + 465L Specification1424 KB
SAL000097D-CN W1+465L Dissolved Ozone Analyzer.pdfW1 + 465L规格 (Chinese Specification)2502 KB
SAL000107B - Industrial Gas Instruments Overview.pdfIndustrial Gas Instruments Overview545 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 with form C relay contacts (SPDT, 5A 250 VAC resistive)
​Diagnostic Features Continuous internal diagnostics with error messages and instrument error relay​
Analog Outputs 4-20 mA or 0-5 VDC standard
​Digital Outputs RS-232 interface, MODBUS​
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) M465 Ozone Analyzer (NEMA):
16.85" x 15.60" x 6.90"
(428 mm x 396 mm x 175 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​
Warranty 1 year​

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



The Model W1, combined with a Model 465L 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.