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Professional HVAC Refrigerant Leak Detector with Heated Diode Sensor, Gas Leak Detector for R410A/R134A/R1234YF, CFCs/HCFCs | Handheld AC Diagnostic Tool with Digital Display & Audible Alarm industrial_April2026 One of the greatest thingsProfessional HVAC Refrigerant Leak Detector with Heated Diode Sensor, Gas Leak Detector for R410A R134A R1234YF, CFCs HCFCs Handheld AC Diagnostic Tool with Digital Display & Audible Alarm Product Features Pro Grade AccuracyAdvanced heated diode sensor detects leaks 20x more precisely than soap bubble methods (0. 1oz yr sensitivity), pinpointing even microscopic refrigerant leaks in HVAC R systems, automotive AC units, and commercial refrigeration.