For first I should know the types of leak that you have .. Because exist to many way and instruments for seek a leaks, and they have a different prices among their.. You can buy a good geophone.. But remember that this instrument, is not simple to use.. You must make more experience.. And another problem is that in a large field you must know where is the pipes.. These you can find with geophone.. have inside it this option.. I use for work two different models of geophone, and believe me, are totally different from their.. I'm speaking of acoustic sound.. For finish I say you this, if the leak or leaks are little, and they aren't expensive, you should call an expert in this job.. It's less expensive for time and money..
Sent from italy