To find water or not to find water??

[Alain47]

Some help guys anyone knows about methods to find water without using point detectors? all i seem to find is sensors that are put over a point were water is suspected to be at, im lookin for something more along the lines of radar like, from a distance.

[berkeman]

Some help guys anyone knows about methods to find water without using point detectors? all i seem to find is sensors that are put over a point were water is suspected to be at, im lookin for something more along the lines of radar like, from a distance.

Welcome to the PF. Do you mean underground water? How far underground? If underground, I don't think ground penetrating radar will get you very deep, but I certainly am no expert on it. Seems like you would need to use sound instead like the oil exploration folks use.

[berkeman]

Looks like GPR can reach down to about 15m in dry soil, but I don't know what power level that assumes:

http://en.wikipedia.org/wiki/Ground_penetrating_radar

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[Alain47]

Yeah I looked into GPR and it won't cut it because it's a point detector, I need something from a distance.
I looked into Ultrasonic Rangefinders which use ultrasonic waves, they may be a bit costly so I'm trying to find cheaper ones on the market since its just a small project.
Would like your opinion on them and thanks for answering to begin with! :)