|Name||Battery Backup for Web600||Spot Water Leak Detector||Humidity Transducer|
|Tool Type||Environment monitoring and alarming||Environment monitoring and alarming||Environment monitoring and alarming|
|View Product||View Product||View Product|
This type of detector isn't designed for outdoor use (or underground use) so I wouldn't recommend it for your application.
If the area is normally dry then yes, it can be used to sense a leaking pipe under a cement slab. This assumes that there is an open area under the slab where water will reach the detector. Also keep in mind that the batteries in the detector will need to be replaced in 3-5 years.