Dissolved Ozone Instruments
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dFFOZ-TR Trace Ultrapure

 Dissolved Ozone Analyzer​




  • Sensitive to Traces of Ozone in Water in the PPB levels

  • Patented Light-Absorption Measuring Technology

  • No Consumable Electrolytes or Membranes

  • No Moving Parts or Routine Maintenance

  • Highly Stable Measurement

  • Immune to Cross Interferences

  • Analog and Digital Interface

  • Convenient Unattended Operation



Maintenance section coming soon.


dFFOZ Trace Level - 610-0140-01.pdfdFFOZ Trace Level Manual308 KB
dFFOZ-TR_DS_TDY.pdfdFFOZ Trace Specification267 KB
ESD Fundamentals - 04786.pdfFundamentals of Electro-Static Discharge (ESD)216 KB


Analyzer Model dFFOZ-TR
Application Traces of Ozone Dissolved in Water
UV Light Source Low Pressure Mercury Vapor Lamp
Units of Measure ppmw mg/L
Range 0 to 1000 ppbw 
​Precision/Repeatability 3 ppbw or 2% of reading
Flow Rate 0.75 to 1.5 SLPM​
Line Pressure 15 to 20 PSI
Enclosure NEMA 4X/IP65
Dimensions 6.3” W x 15.9” H x 3.9” D (160 x 405 x 99 mm)
Maintenance UV lamp Replacement every 24-36 mos. (no other scheduled maintenance) 
Resolution 16 Character, Alphanumeric, Backlit LCD
Cycle Time Continuous Measurement every .5 secs
Analog Outputs Opto-isolated 4-20 mA and 0-10V dc
Digital I/O RS-232C, bi-directional
Internal Diagnostics, Instrument Error Delay

Alarm Relays 3 User Programmable DPDT Alarm Relays
Power 90 to 240 VAC, 50/60 Hz 
Mounting Wall mount NEMA 4 Enclosure
Dimensions 10”W x 8.5”H x 5.6”D (254 x 216 x 143 mm)​



The Model dFFOZ-TR Dissolved Ozone Analyzer is a photometer designed to measure dissolved ozone concentrations. It is based on state-of-the-art light absorption technology which provides very precise and stable readings in the single ppbw levels in High Purity Water and other Clean Water applications.

Designed for maximum reliability and minimum maintenance, the analyzer requires no consumable electrolytes or membranes, and has no moving parts to wear out. The only maintenance required is the replacement of a UV lamp once every few years. Key technical advantages include extreme sensitivity, drift-free stability, and immunity to cross-interference from non-ozone gases.

The dFFOZ-TR analyzer system includes a MINISCI-N Controller that features an alphanumeric LCD display, 4-20 mA and 0-10VDC Opto-isolated analog signal outputs, 3 user programmable DPDT relays, RS-232 digital interface and a button to ZERO the sensor very easily at any time. A turnkey plug and play installation panel configured with pressure gauges, regulators and flow meter is also available as an option.​​