UV254 Analyser – UV254Sense Probe
The UV254Sense Probe offers a method for measuring the levels of organic compounds in water by analyzing its ultra-violet absorbance (UVA) and transmission (UVT). This device operates by continuously flowing water through a specified gap in the probe, allowing a UV254 wavelength light to pass through. It then measures the amount of light that is absorbed (indicative of UVA) and the amount that passes through (indicative of UVT).
Technological advancements in spectral analysis within the ultraviolet light spectrum have enhanced the accuracy of real-time monitoring for organic compounds in water. The UV254 analyzer, which includes capabilities for both UV transmittance and UV absorbance measurements, works by quantifying the light absorbed at a 254nm wavelength. This absorption rate is an effective metric for estimating the concentration of aromatically organic matter in water, which is useful for assessing potential disinfection byproduct (DBP) formation. Manufacturers like Pi have developed UV254 analyzers that not only assess total organic carbon (TOC) levels but are also efficient in detecting natural organic matter (NOM), common across all water sources. This is particularly relevant for understanding DBP formation risks, given the analyzers’ sensitivity to aromatic organic compounds.
Principle of Operation
The UV254Sense Probe by Pi operates using a 254nm wavelength UV LED light source. This light is directed through a water sample via a sapphire window and detected on the opposite side by a photodiode detector. The difference in the intensity of light emitted and the light received indicates the water’s UVA absorption and UVT transmission rates. This relationship is quantified according to Beer-Lambert’s law.
Cost of Ownership
The UV254Sense Probe UV254 analyser has a relatively low cost for calibration and maintenance due to its lack of reagents and moving parts. Maintenance primarily involves routine cleaning and occasional recalibration using either DI or RO water. An automatic cleaning system can further reduce maintenance efforts, thereby lowering the overall cost. When considering both the acquisition and operational costs, the total cost of ownership for the UV254Sense Probe is lower than many other UV254 measuring instruments.
Key Benefits
- UVA (ultra-violet absorbance) serves as a reliable indicator for TOC, DOC, COD, and color measurements.
- UVT (ultra-violet transmission) assists in determining the necessary UV dosage for disinfection systems to enhance their operational efficiency.
- Enables accurate monitoring without requiring additional reagents, offering a cost-effective solution.
- Facilitates improved coagulation control, helping to reduce chemical usage, lower sludge disposal costs, and decrease the likelihood of DBP (Disinfection By-Product) formation.
- UVA measurements aid in verifying the effectiveness of certain contaminant removal processes, including membrane filtration (RO, NF, UF), ion exchange systems (for nitrates and TOC), and granular activated carbon (GAC) treatments.
- Compatible with CRONOS® or CRIUS®4.0, allowing for integration into a versatile UV254 analysis system tailored to specific requirements.
Standard Features
- Operates continuously online
- Utilizes a UV light source at a wavelength of 254nm
- Shows values for UV transmittance or absorbance
Applications
Options
Focus On
FAQs
Downloads
- UVT (Ultra-violet Transmission) – Mainly used for controlling the intensity of UV light in UV disinfection processes.
- UVA (Ultra-violet Absorbance) – Applied for enhancing water treatment processes by adjusting coagulant doses or as an alternative measure for parameters such as TOC or COD.
- Process Control – Involves the direct measurement of parameters to regulate processes like coagulation, UV disinfection, and membranes.
- Specific Parameter Correlation – Employed to estimate values for parameters that are challenging or costly to measure directly, like TOC, BOD, and COD.
- Event Monitoring – Tracks baseline absorbance to alert to changes indicative of potential contamination in municipal settings.
- Industrial Water and Wastewater Secondary and Effluent Monitoring – Assesses treatment efficiency post-secondary treatment and assists in managing tertiary treatment.
"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'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
"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
"The Pi products provide excellent value for money and represent the best municipal drinking water analyzers available."
John Clark
Chemtrac - Atlanta
“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
"Going from ORP control to amperometric chlorine sensor control has undoubtedly improved the pool water immensely!"
Chris Tedeschi
Link Automation - USA
"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
"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
"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
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