Voltage Gradient Probe

Voltage Gradient Probe

Voltage Gradient Probe

The Voltage Gradient Probe (VGP) is a robust, hand-held, subsea unit used to give an easy interpret indication of AC electric field strength in sea water. The VGP's primary use is to indicate to divers or ROVs the presence of any local AC electric fields while working on subsea electrical equipment. The VGP gives an indication of the presence and magnitude of the AC electric field in an easy to interpret 'traffic light' configuration.

  • The VGP comes with a dedicated Testbox which allows functionality to be tested prior to deployment by following a quick, simple and intuitive procedure.
  • Indication of presence and magnitude of the AC electric field using a series of 6x LEDs which illuminate progressively at clearly defined trigger voltages.
  • A dedicated Battery Status LED provides a clear indication of the battery status and provides confirmation that the unit is functioning.
  • Developed with reference to IMCA standard D 045, R 015.



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MODEL NO Voltage Gradient Probe

Length: 392mm ±0.25mm

Diameter: 49mm ±0.25mm

Weight (in air): 2.2kg

Weight (in seawater): 1.8kg

Probe minimum battery life at 5°C

2 days (10 days typical)

Probe battery life

3x Standard 1.5V 'AA' Alkaline cells (Duracell MN1500)

Testbox Battery type

1x Standard 9V 'PP3' Alkaline cell (Durcell MN1604)

Probe operating temperature range

-5⁰C to +50⁰C

Probe external pressure rating

300m / 30 bar (435PSI)