Gadget to determine length of a wire?

[goodlife]

Is there such a thing to measure the length of a wire that is not in a circuit?

We've got a perimeter wire around the garden which helps keeps the dogs inside by zapping them via electric collars. Unfortunately the wire has broken somewhere, but with it buried in the ground and 900m long, we need to find the exact spot where it's broken.

Links to a gadget most welcomed

[Plotloss]

You can get things called time domain reflexometers, generally they are used it networking installations and they aren't at all cheap.

What would have caused the break?

Would it be easier to look for a disturbance on the surface?

[DeanVRS]

find yourself a BT engineer...they use a piece of kit called a mole,later updated to a hawk.

This will give a precise measurement to any diss fault in a length of cable..although thinking about it,the measurement is used on a pair of wires,so unless you only have 1 wire...you may have to use a 2nd wire longer then the diss fault to get an accurate reading.

[x type]

Have a friendly word with one of the guys working for your local electricity company ,you need to ask a cable jointer they should have the equipment on board the van

if you go the "offical pay route" with them youre looking at £1000 +

that's what our lot charge at least

just to buy the gadget price

http://pid.webstrategy.co.uk/pid/ranges.aspx?flid=...

Edited by x type on Sunday 22 August 20:39