I personally own the h10 pm. I love it on r22. I know guys say adjust the sensitivity for 410a???. I coworker bought the yellow jacket accuprobe. I never had luck finding 410a leaks. We were on a critical building doing pms. I saw oil on ll king valve. I sprayed it with bubbles yep packing was leaking. WE checked it with his detector and it picked it up. I was impressed but don't know long term. That detector picks up Trane yellow leak detector( small bottle with swab attached to bottle lid).