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Please be aware we are currently not taking any new orders until 22nd March 2023 due to essential maintenance being carried out to the website to future enhance your shopping experience with us. Thanks The Zetmet Team.


Numerous MK Residual Current Devices from the now discontinued “Sentry” range are available from Zetmet Limited. All RCD’s are designed to monitor the flow of electrical current through a circuit thereby providing protection against an array of faults.

Many of the products in our obsolete section are rare or discontinued. Therefore, stock levels can be extremely limited so act fast as once they’re gone they’re gone!