Best Refrigerant Leak Detector (2026): Top HVAC/R Sniffers Reviewed & Ranked
The best refrigerant leak detectors for 2026 — heated-diode, infrared and A2L-ready HVAC/R sniffers ranked by sensitivity, sensor life and value. Includes EPA 608 leak-rate rules and the R-454B/R-32 A2L transition.