Suspended solids & SVI analysis.Discover S3A
PMA engineers reviewing tablets outdoors

Our Products are smart,
online and integrated.

We have been providers of online instrumentation for the water industry, oil and gas industry and industrial applications for over 52 years.


The online instrumentation experts

Online instrumentation from PMA Ltd utilises a wide range of measurement techniques for a huge range of different applications.

We are known throughout the UK for our proficiency in different measurement technologies such as colorimetry, spectroscopy, ion selective electrodes (ISE), titration, fluorescence, chromatography and more.

Primarily our customers are in the water industry, however, we also have vast experience in online instruments for the oil and gas industry and many industrial applications.


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Our water industry products



TriOS multi-parameter optical sensor field demonstration at a treatment works

Multi Parameter Optical Sensors for Drinking Water and Wastewater

TriOS multi-parameter optical sensors provide real-time UV-Vis water quality monitoring for drinking water and wastewater, supporting precise measurement across raw water, treatment processes and final water applications.


PMA colleague reviewing a process screen with an operator for Compass coagulation control

Compass Coagulation Control systems

PMA Compass automatic coagulation control optimises coagulant dosing for water and wastewater treatment, helping maximise organics removal, minimise DBP formation potential and maintain stable treatment performance.


3S colourimeter at water treatment works

3S online colorimetric analysers

The 3S online colorimetric analyser delivers programmable water quality monitoring in a compact format, supporting long autonomy, low maintenance, controlled operating costs, process control and compliance monitoring.


Lovibond PTV turbidity analyser installed in a treatment facility

Lovibond turbidity analysers for drinking water applications

Lovibond PTV turbidity analysers provide precise low-level turbidity measurement for drinking water applications, combining dependable online monitoring with straightforward operation and practical maintenance for treatment teams.


Accuseries analyser beside a process tank

Online chemical analysis of wastewater and industrial water

AccuSeries online analysers support chemical analysis of wastewater and industrial water using multiple measurement methods, providing a robust and flexible monitoring platform for demanding treatment and process environments.


PMA engineer collecting a water sample

Aquamonitrix Nitrate & Nitrite online analyser

Aquamonitrix provides real-time nitrate and nitrite analysis for drinking water and wastewater, supporting continuous monitoring from raw water and treatment processes through to distribution network applications.


Engineer using a Royce Aqua portable MLSS meter beside a clarifier

Portable MLSS and Sludge Blanket Level Meter

The Royce Aqua portable meter provides accurate MLSS and sludge blanket level measurement for wastewater treatment, giving operators a practical handheld tool for clarifiers, settlement tanks and routine process checks.


Technician operating an S3A analyser in a laboratory

Suspended Solids Analyser. Accurate MLSS & SVI Monitoring

The S3A suspended solids analyser measures MLSS, SVI, supernatant clarity and floating sludge, helping wastewater treatment teams monitor activated sludge performance and make informed process-control decisions.



Our mission

At PMA, we explore new ways of thinking and we aim for an enduring legacy, despite the short-term priorities of our world. Our people are talented in a wide range of disciplines, our principles and code of conduct help guide us in the work we do every day.


Energy Industry

With many years experience in the Oil & Gas sector, you can rely on PMA to help you meet your evolving demands. Whilst the complexity of facilities and procedures are ever increasing, and downtime must be reduced, your competitiveness is improved with reliable and accurate online instrumentation. PMA has a wide range of specialised t instrumentation designed for the oil and gas industry so let us help you achieve your goals.


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Our energy industry products



PMA technician operating a Turner analyser at a refinery

Online oil in water instruments

Turner Designs Hydrocarbon Instruments use UV fluorescence for continuous oil-in-water monitoring, supporting sensitive hydrocarbon measurement across industrial water, process water and environmental applications.


Rhosonics SDM ECO ultrasonic sensor monitoring quarry slurry at an outlet pipe

Ultrasonic Sensors for density and concentration measurement

Rhosonics SDM ECO ultrasonic sensors provide online density and concentration measurement for industrial liquids, including acid and base applications, without relying on radioactive measurement technology.


PMA engineer at a refinery

Automatic Tank Dewatering and Desalter Control

Agar interface probes support automatic tank dewatering and desalter control in oil and gas applications, providing reliable liquid-interface detection for more efficient separation and process management.


Engineers reviewing a Belfield decantation valve

Belfield Decantation Valve

Belfield decantation valves help operators decant and recover liquids with different specific gravities, providing a practical solution for controlled liquid separation across industrial and treatment applications.


PMA engineer carrying a tablet on an industrial site

Innovative Electrically Traced Tubing

Dekoron pre-insulated and electrically heat-traced tubing supports reliable sample and process transfer where temperature control is essential, combining insulation and trace heating in one engineered tubing system.



Let’s talk about your application.

Speak to the PMA team about your instruments, reagents or service requirements. Tell us what you need, and we’ll help you find the right next step.

  • Advice for your application. Find the right instruments, sensors and chemical reagents for your process.
  • Practical service support. Discuss commissioning, calibration, maintenance or an instrument issue with our team.
  • Clear next steps. Ask a technical question or request a callback, with your site and measurements in mind.
  • An enquiry, not a mailing list. Your details are used to respond to you. You won’t be added to a marketing database.

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