UV254 and %UVT

UV254 is the absorbance of light at 254nm, a typical parameter used in water treatment to determine the amount of dissolved organic carbon (DOC) present in real time. It is also sometimes called UVA (UV Absorbance).

 

Many organics in raw water, such as humic substances, are aromatic and exist in relatively high concentrations. Such organics are known to be a precursor of disinfection by products (DBP). UV254 therefore provides one of the best indicators to whether organics are being removed throughout a water treatment process.

 

The reciprocal measurement of UV254 is %UVT. This is the same measurement but expresses the result as a in terms of how much light is transmitted through the sample relative to pure water.

Our products, your world.

Products for this application

s::can spectro::lyser

An advanced online UV-Vis spectrophotometer for measuring multiple parameters simultaneously

s::can UV::lyser

A specialised online sensor for measuring multiple UV wavelengths

s::can i::scan

A compact UV254 and %UVT sensor for network monitoring, drinking water treatment works and wastewater treatment

Compass coagulation control system

A coagulation control system utilising differential UV-Vis spectroscopy for advanced NOM characterisation in real time

Here are some related articles

In pipe water quality monitoring for distribution network monitoring

Measuring multiple key water quality parameters including UV254, colour and turbidity using an in-pipe setup.

A series of 35mm i::scan’s were setup in a grid across a network to measure UV254, TOC, colour and turbidity

Network monitoring with pipe::scan

Understand and troubleshoot the drinking water network with a multi-parameter, inline water quality sensor system

The pipe::scan enables utilities to better understand their network, proactively manage issues such as THM formation hotspots and prevent customer complaints before they occur.

Event detection in groundwater source monitoring

Monitoring of drinking water sources for contaminants requires an advanced event detection system based on UV-Vis spectroscopy and not just parameters. Pollution into groundwater can take many forms and by using event detection software, a flexible and intelligent system can provide the protection that is required.

Ensuring TOC removal in drinking water filtration

In this case study from s::can, the efficacy of ceramic filtration for the provision of drinking water is monitored using a 35mm i::scan sensor to simultaneously measure TOC, UV254 and turbidity.

Reduce cost of running UV disinfection systems in wastewater treatment

Energy costs of running UV disinfection systems are one of the biggest expenditures of a wastewater treatment works, accounting for up to 25% of the total energy usage. An online %UVT sensor can optimise lamp usage.

To contact us, or to request a callback, simply use the form below and we will promptly get back to you.

Experience is at our core

An even better reason to contact us about any of our products and services.

We greatly value all of the inquiries which our products and services generate and we are very confident that we will have the right solution available for you at the first point of contact when you reach our experienced team of engineers.

Your Name (required)

Your Email (required)

Subject (required)

Company Name (required)

Town/City (required)

Telephone (required)

Site/Application Details (required)

Your Message

We take pride in protecting your data. By contacting us, you agree with your submitted data to be used only by PMA and only used to respond to you.


This form only collects your name, contact number and email address so that our support team can communicate with you. Please refer to our privacy policy for how we protect your data.

Need help with anything?

Contact us directly
at [email protected]

A bit about us

Established in 1971 PMA is a well-recognised provider of online instrumentation for process control and compliance monitoring. With expertise in analytical techniques such as Photometry, Colorimetry, Ion-selective electrodes (ISEs), Titration, Fluorescence, Ultrasonics and more.

© 2020 Process Measurement and Analysis Ltd, Water, Oil, Chemicals.

Customer Satisfaction Rating
0%

Customer satisfaction rating in compliance with ISO/TS 1004:2012: Quality Management System Guidelines

Slider