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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  1. Martindale PD690S-C, 690V AC Proving Unit with Soft Carry Case (fits VI)
    Regular Price £184.80 Special Price £147.84 £123.20
    Usually 1-2 weeks

  2. KANE-PU690V, 690V Proving Unit
    £144.00 £120.00
    Usually 1-2 weeks

  3. Kewtech KEWPROVE3, Proving Unit (690V AC/DC)
    Regular Price £150.00 Special Price £90.00 £75.00
    Usually 1-2 weeks

  4. Martindale PD440S, AC Proving Unit (440V)
    Regular Price £139.20 Special Price £111.36 £92.80
    Limited stock

  5. Martindale PD440SX, AC Proving Unit (440V) with CALCHECK
    Regular Price £162.00 Special Price £129.60 £108.00
    Usually 1-2 weeks

  6. Martindale PD690S, AC Proving Unit (690V)
    Regular Price £147.60 Special Price £118.08 £98.40
    Usually 1-2 weeks

  7. Martindale PD240, DC Proving Unit (240V)
    Regular Price £106.80 Special Price £79.68 £66.40
    In stock

  8. Megger MPU690, Proving Unit (690V AC)
    Regular Price £162.00 Special Price £105.60 £88.00
    Limited stock

  9. Fluke PRV240 - Proving Unit (240V AC/DC)
    £223.20 £186.00
    Limited stock

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