Dissolved Ozone Sensor pureO₃

O3 Sensor Probe, pureO3/12/120

Robust and Reliable Ozone Measurement.The pureO3 dissolved ozone sensor guarantees rapid, accurate measurement across a wide range of ozone concentrations. It uses Intelligent Sensor Management (ISM) technology to provide predictive diagnostics for low-maintenance, in situ measurement.

Ensures Full Sanitization

Monitor ozone after sanitization: ozone destroys organic matter and microorganisms better than chlorine and more economically than thermal processes.

Simple and Low Maintenance

The pureO3 dissolved ozone sensor uses a 1-piece membrane for rapid start-up and easy maintenance.

Built-in Predictive Diagnostics

This ozone sensor provides enhanced diagnostics to ensure your sensor is working properly when you need it, and helps maximize sensor lifetime.

Material No.: 30139305

Dissolved Ozone Sensor pureO3
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Specifications - O3 Sensor Probe, pureO3/12/120
Operating Range
0 - 5'000 ppb (µg/L)
Response Time
60 s
Measured Pressure Resistance
0 bar – 3 bar
Sample Flow rate
200 mL/min – 500 mL/min
Sample Flow Rate without Housing
0.5 - 3 ft/s (0.15 - 1 m/s)
Material Number(s)

Designed for Easy Maintenance

The pureO3 with Intelligent Sensor Management (ISM) technology simplifies maintenance processes. The Adaptive Calibration Timer tells you when the sensor needs to be calibrated, while the time-to-maintenance tool indicates when the membrane should be replaced.

Critical Process Monitoring

Monitoring ozone is critical to a wide range of industrial processes. From pharmaceutical water system sanitization to verifying ozone concentration in UPW storage tanks, the pureO3 sensor is a reliable, highly accurate solution.

Long Life Due to Exceptional Durability

The pureO3 has a robust housing that includes a reinforced silicone membrane for exceptional durability. The Dynamic Lifetime Indicator monitors process conditions, enabling it to provide an estimate of the remaining life of the sensor's inner body.

Continuous Measurement

This sensor can be used for continuous ozone measurement, which is a key quality measure in bottled water systems. By continuously measuring the ozone levels, it is possible to respond quickly and make decisions based on any changes.


User Manuals

Instruction Manual for pureO3 Dissolved Ozone Sensor
This manual contains installation, operation and maintenance of the METTLER TOLEDO Thornton pureO3® Dissolved Ozone Sensor.
Instructions for Changing the interior body of the pureO3 ozone sensors 12 mm
This manual contains the instructions need to be observed while changing the interior body.
Instructions for changing the electrolyte and membrane body of the pureO3 ozone sensors 12 mm
This manual contains the instructions for changing the electrolyte and membrane body of the pureO3 ozone sensors 12 mm.


Data Sheet for PureO3 Ozone Sensor
The new pureO3 Dissolved Ozone Sensor with Intelligent Sensor Management (ISM®) technology provides robust, reliable measurement with increased stabi...
Data Sheet: Ozone Sensor Services
Regular maintenance and calibration can extend the life of your ozone sensors. Let expert services by METTLER TOLEDO ensure your ozone sensors are mea...



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O3 Sensor Probe, pureO3/12/120