I have used a few leak detectors over the years and I have to say the Bacharach HC-10 is hands down the most accurate and sensitive I have found. We also have an older Yokogowa model that is corded, over twenty years old and still works well with only one repair instance. Good luck and hope this helps.

Jesse Coble
Technician/Shop Foreman
Dove's Auto Repair, Inc
Mechanicsburg, Pennsylvania, USA