Authorised Sales, Service & Support agents for James Fisher Prolec
Authorised Sales, Service & Support agents for James Fisher Prolec

Office location:

Southern Office:

Dorchester, Dorset

t. +44 (0)1305 230318

m. +44 (0)7899 848569

f. +44 (0)7043 077211




Or use our contact form.

Sphere 24 Ltd - providing

Off Highway Plant Solutions


-high voltage detection system

Overhead cable detection


Overhead  power lines are a hidden killer for operators of heavy plant and machinery.


On average two people are killed each year because the victims did not understand fully the serious dangers that could arise when working near high voltage power lines.

Do you have vehicles within your fleet that extend into the air?

5.2m is the minimum height for power lines up to 33kV.

Power lines are often forgotten until it’s too late; they are not always visible in direct sun light or in inclement weather.  There are fatalities and serious injuries involving overhead power lines all over the world.

Whether operating heavy mobile plant, fixed assets or tipper lorries our High Voltage Detection System helps to give peace of mind when working around and below power lines giving the operator additional support to carry out their day-to-day functions in an efficient manner.


Ideal for all plant and machinery with variable height!

HVDS is designed to aid vehicles and machinery with a variable height from coming into contact with high voltage overhead power lines.  The system consists of a detection antenna and an in cab audio/visual warning unit.
The system can sense the presence of overhead power cables from up to 100 meters away warning the operator of the potential danger.

The HVDS can be easily fitted to any Tipper Vehicles, Excavators, Telehandlers, Cranes, Platforms etc…


  • Detects the presence of overhead high voltage power lines up to 100m
  • Adjustable sensitivity
  • Required power source 11 - 32 Vdc @ <150mA
  • Plug and play - no user calibration required
  • Audio visual in cab warning (85db)
  • Auxiliary switching function which can be used to switch external devices such as an additional alarm, beacon or cut motion
  • Auto resetting mute feature
  • Supplied with a 5 meter antenna cable as STD, optional 15 meter antenna cable available
  • Proven technology with 1000's of units sold worldwide
  • Can be used on almost any type of vehicle
HSE Download - Working Safely near power lines
HSE Working Safely near power lines.pdf
Adobe Acrobat document [152.7 KB]
HSE Download - Avoiding danger from overhead power lines
HSE Avoiding danger from overhead power [...]
Adobe Acrobat document [393.4 KB]
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