Elcometer P500
Imp Box Locator

Designed for, and with the co-operation of Severn Trent Water Authority, one of the UK 's largest regional water companies.

Many other water authorities also use the Imp water valve box detector / locator

It will accurately locate water valve boxes and manhole covers faster than anything on the market. The Imp is deceptively simple in operation and appearance and is extremely popular with the operators who use it on site.

Frequently used by those in the building trade who require a simple rugged instrument for scanning areas of ground before digging foundation. Can avoid very expensive damage to buried services etc.