UV254 Analyser – UV254Sense Probe
The UV254Sense UVA/UVT probe offers real-time analysis of organic UVA (ultraviolet absorbance) and UVT (ultraviolet transmission) in water.
Thanks to advancements in spectral analysis technology, monitoring organic contaminants in water has become far simpler than traditional lab based methods with the UV254 Probe. This probe, which comes standard with UV transmittance and UV absorbance outputs, continuously passes a small flow of water through a gap in the probe. The UV254 Probe shines UV254 light through the water and measures how much light is absorbed (UVA) and how much is transmitted (UVT).
By measuring the light absorbed at a specific wavelength (254nm), you can determine the concentration of contaminants, including organic compounds that contribute to the formation of disinfection by-products (DBPs). The UV254 sensor’s ability to detect the absorption of light provides insight into the amount of aromatic (or reactive) organic matter in water. This makes it a highly effective surrogate for monitoring total organic carbon (TOC) during organic removal processes.
Pi’s UV254 analyzers are capable of detecting natural organic matter (NOM), which is present in all water sources. The UV254 absorption tends to favor aromatic compounds, offering valuable benefits when monitoring the potential for DBP formation.
Principle of Operation
The UV254Sense Probe from Pi features a high-quality, long-lasting 254nm wavelength UV LED light source. This light passes through a sapphire window and shines into the water. A photodiode detector captures the light. The amount of light absorbed by the water is measured as UVA (ultraviolet absorbance), while the amount of UV light that passes through is recorded as UVT (ultraviolet transmission). The relationship between these two measurements follows Beer-Lambert’s law.
Cost of Ownership
The UV254Sense Probe is very cost-effective to calibrate and maintain, as it has no reagents or moving parts. Maintenance is simple, requiring only periodic cleaning and occasional “zeroing” of the analyzer with DI or RO water. With the option of automatic cleaning systems, maintenance costs are kept to a minimum. Combined with its low purchase price, the total cost of ownership for the UV254Sense Probe is significantly lower compared to other UV254 instruments.
Key Benefits
- UVA (ultra-violet absorbance) is an excellent surrogate parameter for TOC, DOC, COD and color.
- UVT (ultra-violet transmission) allows for the calculation of optimal UV dose for disinfection systems, improving efficiency.
- Accurate detection without the cost of reagents
- Few ongoing service or maintenance requirements – no moving parts
- Allows feed forward optimisation of coagulant control, This results in reduced chemical consumption, lower sludge removal costs, and minimized potential for DBP formation.
- Strong ROI with pay back on the analyser being seen by many customers within a few months.
- UVA measurement ensures performance of various contaminant removal technologies such as membranes (RO, NF, UF), ion exchange (nitrates and TOC removal) and granular activated carbon (GAC).
- Real-time UVA analyzers offer a final check of effluent water quality and can alert an operator in case of non-compliance.
- A UVA monitor can monitor the percentage removal of organics across any treatment system.
- Can be combined with a CRONOS® or CRIUS®4.0 for a multi-parameter UV254 analyser solution that suits your needs.
Standard Features
- Online continuous operation
- 254nm wavelength UV LED light source
- Displays UV transmittance or absorbance values
Optional Features
- Self-cleaning
- Process Controls
- Displays UV transmittance or absorbance values
Applications
Options
Focus On
FAQs
Downloads
- UVT (ultra-violet transmission) – The primary application of UV transmission monitoring is to regulate the intensity of UV light output in UV disinfection processes.
- UVA (ultra-violet absorbance) – The primary application of UV absorbance monitoring is to optimize water treatment processes, such as by controlling coagulant dosing or providing a surrogate measurement for parameters like TOC or COD.
- Process control – Direct measurement of a parameter to control a process such as coagulation, UV disinfection and membranes.
- Specific parameter correlation – Correlated to another parameter that is impractical or expensive to measure in real time such as TOC, BOD and COD.
- Event monitoring – Used to monitor baseline absorbance which can trigger an alarm when an absorbance event occurs, such as security monitoring for contamination events in a municipal installation.
- Industrial water and wastewater secondary and effluent monitoring – To determine treatment efficiency after secondary treatment and provide tertiary treatment monitoring and control.
"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
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Phill Tuxford
Detectronic - UK
"The plant can’t produce good quality water without the CoagSense."
Mick Murphy
Wexford Co. Co. - Ireland
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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.”
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ECM ECO Monitoring - Slovakia
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Chemtrac - Atlanta, GA
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Li Yongjun
Jinan Hongquan Water Company - China
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Jiao Tumei
Qingdao Guolin Environmental Technology Co., Ltd., - China
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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
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Chemtrac - Atlanta
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Buckman - Latin America
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Thermomed - Turkey
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Chris Tedeschi
Link Automation - USA
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Ye Yancong
Xiamen Xishan Water Plant - China
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Izasa Scientific - Spain
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Equip Solutions - Illinois, USA
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Allpronix - South Africa
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