Hi new to the Forum but thought i'd put in my 2c worth...

I've found the TIFF electronic leak detectors to be excellent value for money (about $300 Aussie) and completely dependable. I use their base model unit. Quite a few times i've pulled a unit apart on the say so of this machine half expecting it to be a false call and been pleasantly suprised. Not so with CPS. I have used CPS leak detectors which have the best name here in Oz and found them to be completely unreliable. They'll have you pulling your hair out, and are best left in the toolbox to look pretty!

For leak detector fluid I've found a product named Big Blu which seems to stick to the pipe work quite well for long periods of time for finding small leaks and pinpointing leaks.