Online Ozone Analyser for Water – OzoSense
The OzoSense Online Dissolved Ozone Monitor from Pi for the measurement of the ozone concentration in water, is designed to be simple to install and operate, and offers unrivalled stability, accuracy and precision, whilst offering excellent value for money.
World Class Dissolved Ozone Controller Solutions
The OzoSense range of online dissolved ozone analysers and dissolved ozone monitors utilise the very latest and best ozone sensors available in the world today.
The OzoSense sensor is a membraned device which is insensitive to changing pH, uses no reagents, is extremely stable, and has reduced maintenance and reduced whole life costs.
The online dissolved ozone monitor sensors connect to a range of electronic instrument controllers from Pi resulting in world class online dissolved ozone monitoring and controlling solutions. For more information on Pi’s dissolved ozone controllers, click here.
The residual ozone sensors from Pi are two electrode amperometric sensors. The electrodes (the gold working electrode and the silver/halide reference electrode) are behind a membrane that separates the sample from the electrodes and are submerged in an electrolyte. The membrane allows the movement of dissolved ozone from the sample to inside the sensor. The O3 is measured at the working electrode and a current proportional to the concentration of ozone is produced which is reported back to the analyser.
- Stable and reliable – excellent ozone process control – online dissolved ozone controllers
- Suitable for all potable, process and salt waters
- Up to 6 months between maintenance
- Up to 3 months between calibration
- Does not respond to residual chlorine
- Resistant to detergents in the water
- Onboard PID controls – online dissolved ozone controller
- Onboard data logging and graphing capability
- Onboard comms such as TCP/IP, Modbus, Profibus and more.
The OzoSense sensors and flow cells are available with different dissolved ozone controllers giving you the same great performance with different communication, display, and control options.
The OzoSense Residual Ozone Monitor suffers no interference from other oxidants such as Chlorine. Coupled with its excellent zero and calibration stability it is extremely well suited to the monitoring of the residual or dissolved ozone concentration in water in clean or harsh environments.
The OzoSense online dissolved ozone monitor is bufferless and reagent free, meaning it has a low total cost of ownership and with maintenance intervals for up to 6 months, it is fast becoming the instrument of choice for the engineer who wants the best online residual ozone monitor at the best price.
The OzoSense online dissolved ozone monitors are currently installed on many applications including:
- Bottled Water Plants – ozone monitors
- Ozone Dosing Control – ozone controllers
- Remote Sites
- Cooling Towers
- Food Preparation
- Hospitals
- Secondary Ozonation
- Wastewater Ozonation
Anywhere you have a requirement to measure online residual ozone in water is a suitable application for the OzoSense ozone monitor. The OzoSense range is particularly suited to working in sites where reliability and ease of use are most important. The sensors are resistant to the presence of tensides making them suitable for use in many washing applications.
As described elsewhere, the OzoSense can come equipped to automatically clean itself at user defined intervals with all the benefits of no operator intervention. The AutoFlush is particularly useful in food preparation, pulp and paper, and many applications where there is likely to be a build up of solids in the sample.
For ozone analyser options such as communications, relays and controls, please click here.
The whole range of OzoSense online dissolved ozone monitors and online dissolved ozone controllers can be fitted with additional sensors such as more ozone sensors, turbidity, pH and many others. Such flexibility can save considerable sums of money when putting together and monitoring or controlling solutions for ozone.
When you add ozone to seawater it reacts with the bromide salt in seawater and you get bromine. Pi offers a total bromine sensor for this application. Click here.
This depends on the application. The online residual ozone sensors have a very low drift so most people calibrate it either once a week or once a month.
Every 3-6 months.
Yes, the OzoSense is resistant to the effects of tensides.
No.
If stored in a cool dry place, two years.
There will be a small response to residual chlorine (<2%) and also to chlorine dioxide (<7%) for the membraned sensor. There could be other interferences. Please contact Pi for details.
PVC, stainless steel, perspex (sensor plus overflow cell).
>3°C – <50°C.
The sensor operates at a positive voltage all of the time so any drift on the zero is negligible compared to the positive operating voltage so no zero is necessary.
Nothing! The sensor has a thermistor that measures the temperature and does an automatic compensation.
Use a handheld meter. These are available from a variety of suppliers and nearly all of them utilise colourimetric DPD to determine the ozone concentration in the sample.
Firstly take the sample from right at the instrument. Secondly don’t take the sample when the concentration is varying quickly, and thirdly use a good quality handheld and follow the instructions carefully.
During calibration the analyser looks at the stability (rate of change) of the signal from the probe and if it varies by more than 10% over the countdown then the analyser prevents calibration to avoid the calibration routine introducing errors.
Ozone is an allotrope of oxygen having the chemical formula O3. It is three oxygens joined together. It decays to O2.
Dissolved ozone is a powerful oxidant and can therefore be used to disinfect water. Specifically it can:
- React with and remove manganese
- Destroy some pathogens resistant to chlorine such as Giardia and Cryptosporidia
Ozone disinfects and leaves no taste or odour. In addition, it completely breaks down urea so doesn’t form organochlorine or combined chlorine products.
There is no difference between an ozone monitor and an ozone analyser. They are just two expressions used interchangeably by different people. An ozone controller is an Ozone monitor or analyser that has on board control functionality. The Pi OzoSense has such on board functionality, so for a Pi OzoSense there is effectively no difference between an ozone controller, analyser and monitor.
If you have any other questions relating to the online measurement and control of dissolved ozone, please don’t hesitate to contact us.
Document | Type | Size |
---|---|---|
OzoSense | Brochure | 684kB |
Residual Ozone Monitoring and Control | Article | 531kB |
Using Open Flow Cells with Membraned Sensors | Technical Note | 762kB |
DPD Checklist | Technical Note | 487kB |
Probe Fouling | Technical Note | 459kB |
"We at Scottish Water have been using the excellent Pi LabSense 3 and portable UV254 instruments in the field for optimizing our Water Treatment processes for some years now. We find them easy to use and invaluable for detecting and resolving issues in a timely, efficient and effective manner. Two great pieces of kit!”
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Li Yongjun
Jinan Hongquan Water Company - China
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Qingdao Guolin Environmental Technology Co., Ltd., - China
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Ocoee Utility District - Ocoee TN
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