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About Castle Electrodes

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Welcome to the website for Castle Electrodes Ltd. We manufacture in the UK a range of manganese dioxide and silver/silver chloride reference electrodes for measuring the potentials of buried and submerged steel.

Primarily our reference electrodes are used for permanent installation in reinforced concrete to monitor reinforcement steel potentials for corrosion activity or control a cathodic protection system.

We also supply permanent and portable silver chloride reference electrodes for seawater immersion to measure steel potentials.

We supply directly to all continents of the world and can generally deliver within 3 weeks of the order being received.

With no distributors you are able to deal directly with Head Office in the UK and our prices are very competitive.


Castle Electrodes Ltd has been trading since 1994 providing quality reference electrodes across the world. Some of our first contracts include 800 LD25 electrodes supplied to Mina Zayed Port in Abu Dhabi in 1995 and 150 LD25 electrodes supplied to the A92 Tay Road Bridge in Scotland in 1994.

These were installed to monitor reinforcement steel potentials in concrete for impressed current cathodic protection systems and still continue to perform satisfactorily after 25 years in very harsh environments.

Since 1994 CEL has gone on to develop a range of reference electrodes, including manganese dioxide, to meet industry demand but continue to supply the LD15 and LD25 range which have been so successful over the years.



Bob Berry, Commercial Manager

Bob has considerable experience in the field of concrete durability working for material suppliers and contractors. He is able to assist clients with advice on the electrode selection and installation procedures. As Commercial Manager he manages all client enquiries.


Bob Pack, Quality Control and Production Manager

Quality Control and Production Manager. Bob has 34 years experience in the manufacturing industry specializing in electronics, cabling systems and high tech instrumentation. He has worked for CEL since 2001 and is responsible for the manufacture and quality control departments.

Our Motive

Castle Electrodes Ltd was established to develop reliable instrumentation for monitoring cathodic protection systems in the harshest of environments for the construction and petrochemical industries worldwide. It has gone on to develop a whole range of measurement electrodes to meet individual customer requirements and exports over 75% of all units manufactured.

Mission and Goals

Our mission is to supply quality reference electrodes to meet the demands of our worldwide customers and our goal is to be the largest supplier in the world.

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Castle Electrodes

Ann Duels House
Holyport Street
Phone: +44 (0) 208 144 6688
Mobile: +44 (0) 752 545 2382