A good leak detector is a big investment and one of the more important tools a tech has on the truck. I’ve had the same leak detector for years and I’ve replaced everything on it from sensors to pumps to the probe.
One thing that I have learned is that with leak detectors care, maintenance, and testing is a huge part of finding leaks the first time. It will also save you a lot of money. This little tutorial covers the Bacharach H10 series but many of the tips apply to most detectors.