A handheld sniffer-style detector for pinpointing refrigerant leaks in CFC, HCFC and HFC lines (including common types like R12, R22, R134a and R410A), using a flexible 15-inch gooseneck tip to reach into tight spaces around coils and fittings. It flags leaks with a tri-color LED bar plus an audible alarm, needs no field calibration, runs roughly 40 hours on its batteries, and this listing includes an accredited calibration certificate with documented measurement uncertainty for traceability.