Instruct: Classify the given review as either positive or negative.
Query: Tif refrigerant leak detector

This leak detector way out performs any leak detector i've used in the past. And I've been in the field for over 15 yrs. It worked really well for R-410a. The tone is easier to hear in load places but it really impressed me when it found a leak i couldnt find a leak with another workers detector. have refered it to numerous co-workers and at amazon.com at price cheaper than any place locally.....this is a really great product.