Online Dissolved Oxygen Meter – OxySense
"The Pi products provide excellent value for money and represent the best municipal drinking water analyzers available."
John Clark
Chemtrac - Atlanta
"The support from Pi and its partners is superb. They go above and beyond to ensure that, not only is their equipment perfect but that the process is working great too. Five Stars!"
Anthony Glitto
Equip Solutions - Illinois, USA
"Going from ORP control to amperometric chlorine sensor control has undoubtedly improved the pool water immensely!"
Chris Tedeschi
Link Automation - USA
"We've been using these analyzers since 2008. They're easy to use and very stable. Calibration and maintenance is quick and simple."
Lloyd Gruginski
Chehalis WTP - Chehalis, WA
"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!”
Paul Weir
Scottish Water - UK
"I want to thank you and all at Process Instruments for all the assistance, information and handholding during the year. The help that was so freely given was very much appreciated. Can you please extend my appreciation to all at Pi and let me wish you all a happy, safe and wonderful Christmas and I look forward to working with you again in 2021."
Michael Bailey
Wexford Co. Co. - Ireland
"Excellent level of support and always so much more prompt than a lot of our suppliers."
Phill Tuxford
Detectronic - UK
"The plant can’t produce good quality water without the CoagSense."
Mick Murphy
Wexford Co. Co. - Ireland
"We started using Process Instruments 10 years ago and they worked so well that when we were looking at expanding, Process Instruments were our "go to" company."
Rebecca - Pool Manager
Woodland Spa - Burnley, UK
"We've been installing pools and spa controllers from Pi for more than 10 years and they just are the best on the market."
Dr. Lester Symmonds
Pool Sentry - UK
"We've used the CRIUS® with chlorine, pH and conductivity sensors for several years and confirm quality, performance and reliability has been wholly satisfactory to date."
David Kerr
Karis Technical Services Ltd. - UK
"We in ECM ECO Monitoring can only recommend Process Instruments products and services to all other potential clients. They have very complex portfolio of products for water quality monitoring in various types of industries, friendly attitude, very quick delivery time and prompt reaction to all our needs and inquires. Our clients especially appreciate the particle counters and sizers allowing identification of drinking water treatment problems. The Streaming Current Monitors are a great tool for optimisation of expensive chemicals.”
Branislav
ECM ECO Monitoring - Slovakia
"Simply the best turbidity available."
John Clark
Chemtrac - Atlanta, GA
"In 2019, we purchased 29 particle counters which were installed in our water plants. So far, their performance has been perfect."
Li Yongjun
Jinan Hongquan Water Company - China
"We have installed hundreds of ozone analyzers from Pi over the years. They are just accurate, reliable and require low maintenance."
Jiao Tumei
Qingdao Guolin Environmental Technology Co., Ltd., - China
"Over the last few years we've purchased chlorine and turbidity analyzers from Chemtrac and with routine calibration the probes measure the chlorine and turbidity without any issue. We are very happy with this product and would highly recommend them."
Daniel "Buck" Owen
Ocoee Utility District - Ocoee TN
“Servicing customers is much more than just solving problems or addressing complaints and Pi does that very competently with technical and quick efforts providing a good experience."
Clovis Tuchapski
Buckman - Latin America
"Pi's technical team has enabled us to be one step ahead of our competitors by adding value to our projects thanks to their fast and excellent support from the moment you first reach out.
Ibrahim Kaplin
Thermomed - Turkey
"The Streaming Current Monitor from Pi is the best SCM I have ever used. The analyser responds quickly and has many powerful functions, which helps me save a lot of money."
Ye Yancong
Xiamen Xishan Water Plant - China
“Process Instruments has a broad range of high quality and user-friendly solutions for water-industry problems. The short lead times and great customer support make Pi a reliable partner.”
Péter Szabó
SC KATALIN NOHSE CHIMIST IMPORT SRL - Romania
"Process Instruments UK always have a high level of customer service. All our interactions with Pi have exceeded our expectations. It is always a pleasure working with you.”
Iñaki Seisdedos Rodríguez
Izasa Scientific - Spain
"Process Instruments UK always have a high level of customer service. All our interactions with Pi have exceeded our expectations. It is always a pleasure working with you.”
Rudi Tuffek
Allpronix - South Africa
Which is the best online DO meter?
The OxySense DO meter from Pi utilizes a luminescent optical core. This sensor core is incorporated into a specialist sensor housing designed by Pi for wastewater, e.g. in aeration lanes and oxidation ditches. The sensor measures from 0 to 50ppm and is extremely accurate and reproducible with self-cleaning and self-verification built in.
The OxySense dissolved oxygen sensor is robust, accurate and reproducible and is as close as it is possible to get to “fit and forget” dissolved oxygen measurement.
The OxySense Online Optical Dissolved Oxygen Analyzer with self-cleaning and self-verification offers enhanced reliability and unrivalled low maintenance. Optical DO meters have largely replaced electrochemical DO sensors (Clark Cells) due to their better reliability and lower maintenance requirements.
The OxySense DO sensor is available with different controllers giving you the same great performance with different communication, display, and control options.
| Document | Type | Size |
|---|---|---|
| OxySense | Brochure | 6.1mB |
| NIW DO Trial | Article | 1.2mB |
| Dissolved Oxygen Meter for Aeration Control | Technical Note | 602kB |
| AirFlush | Technical Note | 594kB |
| Probe Fouling | Technical Note | 459kB |
FAQs
Why should I choose Pi’s dissolved oxygen analyzer?
The OxySense is an extremely rugged sensor, which provides long life and reliability even in harsh environments such as aeration lanes. Additionally, our automatic cleaning not only ensures that the OxySense isn’t fouled but also performs a self-verification check every time is it used.
How does the integrated self-cleaning work?
The OxySense self-cleans using a blast of pressurized air to dislodge fouling on the sensor surface. The air line is integrated into the body of the probe, so the OxySense remains smooth and low profile to reduce ragging.
How does the integrated self-verification work?
Because the automatic cleaning is performed with air rather than water, during cleaning the sample water is excluded from the end cap of the sensor. This allows for a verification check, as air covers the lumiphore and the reading should be much higher than in water. If this is not the case, the analyzer will flag an error to notify the operator.
How does the AutoClean work?
Simple controls on the Pi analyzer control how often, and for how long, the sensor is cleaned and this can be set by the operator based on the demands of their process. A ‘hold’ signal can also be used to prevent the higher reading from self-verification in air from affecting data logs or output.
How often does the lumiphore need changing?
We would typically expect a lumiphore to have a lifespan of about two years, but this does vary from process to process.
How do I change the lumiphore?
Changing the lumiphore is quick and easy; simply unscrewthe old lumiphore and screw the new one on. No changes are required on the analyzer.
Can water be used to clean the sensor?
Yes, it can. This might be more convenient on your site, where pressurized water might be more readily available than pressurized air. Self-verification is not available when cleaning with water, however; if this is required, Pi can supply an AirFlush compressor unit specifically designed to supply pressurized air to OxySense probes.
Do the AutoClean and AutoVerify systems require any moving parts to be replaced?
AutoClean and self-verification are ‘built in’ to the sensor design, so there are no moving parts in the process stream.
How does the dissolved oxygen sensor work?
The sensing element (lumiphore) is activated, or excited when illuminated with a blue light. When activated, the lumiphore then emits red light in an intensity that is inversely proportional to the amount of oxygen present in the water. There is also a time delay between the peak emission of blue light and peak response of fluoresced red light. The amount of delay is inversely proportional to the amount of oxygen present. This time delay can be expressed as a phase shift between the wave patterns of incident blue light and the fluoresced red light. This is in turn reported by the electronics into a ppm or mg/l reading of Dissolved Oxygen.
"The Pi products provide excellent value for money and represent the best municipal drinking water analyzers available."
John Clark
Chemtrac - Atlanta
"The support from Pi and its partners is superb. They go above and beyond to ensure that, not only is their equipment perfect but that the process is working great too. Five Stars!"
Anthony Glitto
Equip Solutions - Illinois, USA
"Going from ORP control to amperometric chlorine sensor control has undoubtedly improved the pool water immensely!"
Chris Tedeschi
Link Automation - USA
"We've been using these analyzers since 2008. They're easy to use and very stable. Calibration and maintenance is quick and simple."
Lloyd Gruginski
Chehalis WTP - Chehalis, WA
"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!”
Paul Weir
Scottish Water - UK
"I want to thank you and all at Process Instruments for all the assistance, information and handholding during the year. The help that was so freely given was very much appreciated. Can you please extend my appreciation to all at Pi and let me wish you all a happy, safe and wonderful Christmas and I look forward to working with you again in 2021."
Michael Bailey
Wexford Co. Co. - Ireland
"Excellent level of support and always so much more prompt than a lot of our suppliers."
Phill Tuxford
Detectronic - UK
"The plant can’t produce good quality water without the CoagSense."
Mick Murphy
Wexford Co. Co. - Ireland
"We started using Process Instruments 10 years ago and they worked so well that when we were looking at expanding, Process Instruments were our "go to" company."
Rebecca - Pool Manager
Woodland Spa - Burnley, UK
"We've been installing pools and spa controllers from Pi for more than 10 years and they just are the best on the market."
Dr. Lester Symmonds
Pool Sentry - UK
"We've used the CRIUS® with chlorine, pH and conductivity sensors for several years and confirm quality, performance and reliability has been wholly satisfactory to date."
David Kerr
Karis Technical Services Ltd. - UK
"We in ECM ECO Monitoring can only recommend Process Instruments products and services to all other potential clients. They have very complex portfolio of products for water quality monitoring in various types of industries, friendly attitude, very quick delivery time and prompt reaction to all our needs and inquires. Our clients especially appreciate the particle counters and sizers allowing identification of drinking water treatment problems. The Streaming Current Monitors are a great tool for optimisation of expensive chemicals.”
Branislav
ECM ECO Monitoring - Slovakia
"Simply the best turbidity available."
John Clark
Chemtrac - Atlanta, GA
"In 2019, we purchased 29 particle counters which were installed in our water plants. So far, their performance has been perfect."
Li Yongjun
Jinan Hongquan Water Company - China
"We have installed hundreds of ozone analyzers from Pi over the years. They are just accurate, reliable and require low maintenance."
Jiao Tumei
Qingdao Guolin Environmental Technology Co., Ltd., - China
"Over the last few years we've purchased chlorine and turbidity analyzers from Chemtrac and with routine calibration the probes measure the chlorine and turbidity without any issue. We are very happy with this product and would highly recommend them."
Daniel "Buck" Owen
Ocoee Utility District - Ocoee TN
“Servicing customers is much more than just solving problems or addressing complaints and Pi does that very competently with technical and quick efforts providing a good experience."
Clovis Tuchapski
Buckman - Latin America
"Pi's technical team has enabled us to be one step ahead of our competitors by adding value to our projects thanks to their fast and excellent support from the moment you first reach out.
Ibrahim Kaplin
Thermomed - Turkey
"The Streaming Current Monitor from Pi is the best SCM I have ever used. The analyser responds quickly and has many powerful functions, which helps me save a lot of money."
Ye Yancong
Xiamen Xishan Water Plant - China
“Process Instruments has a broad range of high quality and user-friendly solutions for water-industry problems. The short lead times and great customer support make Pi a reliable partner.”
Péter Szabó
SC KATALIN NOHSE CHIMIST IMPORT SRL - Romania
"Process Instruments UK always have a high level of customer service. All our interactions with Pi have exceeded our expectations. It is always a pleasure working with you.”
Iñaki Seisdedos Rodríguez
Izasa Scientific - Spain
"Process Instruments UK always have a high level of customer service. All our interactions with Pi have exceeded our expectations. It is always a pleasure working with you.”
Rudi Tuffek
Allpronix - South Africa
