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Martindale VT25/PD Voltage Detector and Proving Device Kit

This kit comprises of a VT25 voltage Indicator & PD690 Proving Unit. Voltage testers should be proven regularly to avoid possible faulty operation.

Next Day Delivery (subject to availability)

including VAT @ 20%
Regular Price:
  • GS38 Compliant
  • Detachable Probes
  • Phase Rotation Tester
  • LED Indicator
  • Tests Up To 690v
  • Case Included
  • 690V Proving Unit
  • FreeDelivery
  • 30DayMoneyBack
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Martindale VT25/PD Voltage Detector and Proving Device Kit


Safe isolation procedures state that voltage indicators should be proved against a known source both before and after use. As the UK market leader in voltage indication, Martindale supplies a kit with both the VT25 and proving unit, this is all housed in a TC55 carry case with a neck strap, making it easy to carry and use the equipment on site.

The VT25 is a two pole LED voltage indicator for use on AC or DC systems, displaying voltages from 12V to 690V. Additional functions of this model include audible and optical continuity, phase rotation and a single pole phase test. Safety features include a built-in torch, for working in darker areas and also two layers of insulation on the cable. The inner layer is a contrasting colour to the outer, making it easy to see if there has been any damage to the cable.

The proving unit with this kit is the Martindale PD690. This will light up all the LEDs on the indicator, enabling you to ensure your indicator is working correctly. The proving unit also features a low battery indicator, so you know when the batteries need replacing, thus ensuring your proving device is always working correctly.


VT25/PD Comes Supplied With:

  • VT25 Voltage Tester
  • PD690 Proving Device
  • Soft Carrying Case
  • Batteries


Martindale VT25/PD 
Voltage Indicator  
Maximum Working Voltage 690V DC & AC rms
Nominal Voltage Threshold Indications 12, 24, 50, 120,
230, 400, 690V AC/DC
Nominal Voltage Threshold Tolerance Conforms to BS
Polarity Indication from 12V DC/AC rms
Range Detection Automatic
Response Time <1s at 1005 of each nominal voltage
Frequency Range DC, 16 to 400Hz
Test Current <3.5mA at 690V
Duty Ratio 30s ON (operated) / 240s OFF (recovery)
Single Pole Phase Test  
Voltage Range 100 to 690V AC RMS
Frequency Range 50 to 60Hz
Phase Rotation Test  
Voltage Range 120 to 400V AC RMS (Phase to Earth)
Frequency Range 50 to 60Hz
Resistance Range 0 to 500kΩ + 50%
Overvoltage Protection 690V DC or AC rms
Operating Temperature -10°C to 55°C
Storage Temperature -20°C to 70°C, non condensing
Humidity Max 85% R.H.
Altitude Up to 2000m
Power 2 x 1.5V, AAA alkaline batteries (IEC LR03,
Battery Consumption 80mA approx.
Dimensions 205(L) x 67(W) x 27(D) mm
Weight 130g approx
Conformity BS EN61243-3:2010 CAT IV 300V, CAT
III 600V
Class II, Double Insulation
Pollution Degree 2
IP Rating IP64
Conformity BS EN61326-1

Standard Delivery 3-5 Day Delivery – UK
£2.95 for all all orders under £40.00 (exld vat). Sent by Royal Mail Tracked, delivered/posted within 3-5 working days from the date of your order, subject to availability.

Standard Free Delivery 3-5 Day Delivery – UK Mainland only - Zone A & B
Included in the price for all orders over £40.00 (exld vat). Sent using FedEx, delivered within 3-5 working days from the date of your order, subject to availability.

Express DPD Delivery 1-2 Day Delivery – UK Mainland only - Zone A & B
£4.50 select at the checkout. Sent using DPD on their Award Winning “Predict” Service with these great key benefits:

  • You are given a one hour delivery window. (no more waiting in all day for your parcel)
  • You are notified by text or e-mail on your parcels progress.
  • Change of plan? You can easily use the text or e-mail to rearrange your delivery.
  • Notifications on your parcel up to 15 minutes before delivery.

Orders must be placed before 3pm for next day delivery and a mobile number supplied, subject to availability.

Next Day Delivery – UK Mainland only - Zone A & B
£8.00 select at the checkout. Sent using FedEx, orders must be placed before 3pm for next day delivery, subject to availability.

Saturday Pre 12am - UK Mainland only - Zone A & B
£15.00 select at the checkout. Sent using FedEx, orders must be placed before 3pm for Saturday delivery.

Delivery Surcharges
Because of the high cost of carriage we need to apply a surcharge on all deliveries made in the following regions: 

  • Scotland, Isle of Wight & Isles of Scilly - £6.00  
  • Scottish Highlands and Northern Ireland - £12.00  Zone C
  • Scottish Islands, Isle of Man and Channel Islands - £14.00  Zone D
  • Southern Island - £15.00  Zone E


 International delivery

International delivery charges are automatically added to your order at the checkout; you can also use the guide below for a guide on prices. For any questions regarding international deliveries please contact us at

 Zone 1:

  • France, Germany, Belgium, Netherlands, Luxembourg. £20.00 per parcel

Zone 2:

  • Austria, Denmark. £22.00 per parcel
  • Liechtenstein, Switzerland £47.00 per parcel (added cost for custom clearance surcharge)

Zone 3:

  • Czech Republic, Italy, Slovakia, Spain. £28.00 per parcel

Zone 4:

  • Estonia, Finland, Hungary, Poland, Portugal, Slovenia, Sweden. £50.00 per parcel

Zone 5:

  • Bulgaria, Croatia, Greece (incl islands) Latvia, Lithuania, Romania. £60.00 per parcel

Bosnia-Herzegovina, Iceland, Norway, Serbia. £85.00 per (added cost for custom clearance surcharge)

If no shipping option is available to your selected country.  Please call us on +44 (0) 1603 406 148 to purchase your items.