Think safety
Think proving dead
Think Martindale

Martindale’s new proving unit range… keeping you safe

safe isolation

Safe electrical working requires the use of a voltage indicator that has been proven with a suitable proving device. With the introduction of four new products, Martindale now has the widest range of proving units available for use with 230V, 440V and 690V voltage indicators. One model also includes a Calcheck function for verifying resistance range calibration on installation and insulation testers.

Choosing a
proving device

The six Martindale proving units offer solutions for a wide range of applications, but which one is right for you? Follow our simple flowchart to find out…

Range features include

Suitable for use on
230V, 440V & 690V


Stepped voltage

Overmoulded case

Low profile

Magnetic hanger

Auto off

High / low Z

Installation tester

Find out more about our proving devices

Martindale 230V AC / DC
proving device


Martindale 440V AC
proving device


Martindale 440V AC
proving device


Martindale 440V AC / DC
proving device


Martindale 440V AC / DC
proving device


Martindale 690V AC
proving device


Martindale 690V AC / DC
proving device


Try our quiz

Do you know the safe isolation basics? Test your knowledge with our Safe Isolation quiz – 17 questions, multiple choice – good luck!

ALIVE - our failproof steps to safe isolation

Introducing a memorable, compliant safe isolation procedure which helps reduce the number of electricity-related injuries and fatalities in the work place.

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