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Proving Units

Choose The Right Proving Unit

For voltage indicators that have a maximum 400V test range, you need the Martindale PD430 or PD440. If your voltage indicator has a maximum 690V test range, you will need the Martindale PD690 or PD700.

Always use a proving unit that will check the full range of your voltage indicator to ensure it is working correctly.

If you have a DC specific application, the Martindale PD710 will prove up to 700V DC.

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14 Items

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  1. Martindale PD440S 440V AC Proving Unit
    Special Price £91.20 £76.00 Regular Price £114.00
    Available to Order

  2. Martindale PD440SX 50V/120V/230V/440V AC Proving Unit with CALCHECK
    Special Price £110.40 £92.00 Regular Price £138.00
    In Stock

  3. Martindale PD690S 690V AC Proving Unit
    Special Price £95.04 £79.20 Regular Price £118.80
    In Stock

  4. Martindale PD690SX 50V/120V/230V/400V/690V AC Proving Unit with CALCHECK
    Special Price £114.24 £95.20 Regular Price £142.80
    In Stock

  5. Martindale PD430 - Proving Unit (50V AC / 440V AC)
    Special Price £94.80 £79.00 Regular Price £134.40
    In Stock

  6. Martindale PD440 - Proving Unit (440V AC)
    Special Price £97.20 £81.00 Regular Price £109.20
    Available to Order

  7. Martindale PD690 - Proving Unit (700V AC)
    Special Price £105.60 £88.00 Regular Price £118.80
    In Stock

  8. Martindale PD700 - Proving Unit (50V AC / 700V AC)
    Special Price £105.60 £88.00 Regular Price £141.60
    In Stock

  9. Martindale PD710 - Proving Unit (700V DC)
    Special Price £120.00 £100.00 Regular Price £150.00
    In Stock

  10. Martindale PD240 - Proving Unit (240V DC)
    Special Price £69.60 £58.00 Regular Price £82.80
    In Stock

  11. Megger MPU690 - Proving Unit (690V AC)
    £139.20 £116.00
    In stock

  12. Fluke PRV240 - Proving Unit (240V AC/DC)
    £150.00 £125.00
    In stock

  13. Martindale TC70 VTPD - Soft Carry Case
    Special Price £25.92 £21.60 Regular Price £32.40
    In stock

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14 Items

per page