Martindale PD440 - 440V Proving Device

Martindale Electric

Martindale approved distributor and service centre.

The Maindale PD440 is a portable battery powered proving unit for the testing of contact type voltage detectors up to 440V.

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Usually Stock or Short Lead Time

£ 75.65 rrp £ 89.00

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(£ 90.78 inc VAT.)

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The Martindale PD440 is a 440V AC proving device, designed to enable voltage indicators to be fully checked, in compliance with Health & Safety recommendations.

It is compatible with the Martindale VI13700G & the Martindale VI13700/2. The PD440 can also be used to check Drummond and other filament test lamps as well as standard multimeters and other manufacturers two pole voltage indicators.

The units can be powered by either alkaline batteries or a 12V power supply. There are two power supply units available for the proving devices, the PSUPD230 and the PSUHPAT12. The PSUPD230 can be connected to mains power and the PSUHPAT12 is a 12v power supply suitable for use in a car/van cigarette lighter.


Safely and simply proves the operation of voltage indicators and test lamps.
Essential for implementing effective safe isolation procedures.
440V industry leading proving unit for all low & high impedance testers.
Long battery life time with low battery indicator.
Optional in-car & mains power supplies available.

Martindale PD440 Specifications:

  • Output Voltage: 440V nominal.
  • Operating Temperature: -10°C to +40°C at max 70% RH.
  • Battery: 6 x LR6 / MN1500 1.5V alkaline batteries or equivalent.
  • Dimensions: 143 x 84 x 50mm.
  • Weight: 400g approx including battery.
  • Martindale PD440 warranty: 2 years.

Includes: 6 x 1.5V AA alkaline batteries, PD440 Instructions.

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Martindale PD440 - 440V Proving Device