Is there an electronic device which allows one to locate a water leak under-ground or under a cement slab?

I found this one, see link: http://www.leak-pro.com/

I have an interest in your answers as I currently have a slow leak which is causing me concern, however it would take a 100 years to pay for kit like this. Maybe these devices can be hired.

Hope you are successful.

these devices are expensive,way to much for the one time user.Look in yellow pages under leak detection for people that do that, or call a plumber and ask them if they have one.Another note; Just having the device doesn't mean that you can be as precise as someone that has been doing that type of work for5-10 years. The guy that I use has been doing it since 1982. But to answer your question, look at ridged.com. They wont give prices, but will tell you the distributer in your area that can get you one.

Am dealing with this problem myself this past week! Couldn't get the house to level, called a company recomended by the levelers. They stuck a balloon type thing in one of the sewer drains and filled a bathtub to drain, the water level sank 19 inches in 20 minutes. They said it was a sewer pipe busted below the slab. This cost 160.$ US. They told me another guy will come out with a camera-ona-snake to find the leaks, for only 400$US. To repair the leaks will require their digging under the house, and 1150.$US to repair (EACH ONE!) Whew, am sure glad I'm only renting.

Yeah! The insurance company sent inspectors to a flooded house I was working on. Couldn't tell you what company, but they had all kinds of gadgets and gizmos that tested the moisture content of the floors and walls. Also tested for mold spores and all kinds of things and came up with a very thorough report. These sensors did not look cheap. Check with a carpet outlet store. They have similar probes and stuff though not as nice.

A regular old stethascope will work. Do you know a retired nurse? Get everyone else out of the house to prevent needless noise. The larger the leak the easier you will find it.