GL77B Refrigerant Leak Detector, Halogen Freon Sniffer, High Sensitivity HVAC AC Leak Tester, Detects R22 R32 R134a R410a for Automotive Air Conditioner & Refrigerator Repair

High Sensitivity Halogen Freon Leak Detector with UV Light Probe – Heated Diode Sensor for RV AC & Air Conditioning Refrigerant Repair Tired of elusive refrigerant leaks ruining your RV trips or AC performance? Our professional leak detector is your ultimate solution for fast, accurate leak detection—designed for both DIY enthusiasts and HVAC technicians. Equipped with a high-precision heated diode sensor, this tool detects even micro-leaks (down to 0.14 oz/year) of halogen-based refrigerants, including R-134a, R-410a, R-1234yf, CFCs, and HCFCs. The integrated UV light probe takes detection to the next level: pair it with fluorescent leak detection dye, and the UV light illuminates the leak point with bright glow—no more guessing where the leak is hiding! With intuitive audio-visual alarms (increasing beep frequency + flashing LED lights) and a responsive probe, you’ll pinpoint leaks in seconds, whether you’re repairing RV AC units, home air conditioners, or automotive cooling systems. Ergonomic handheld design ensures comfortable use for hours, while the durable construction stands up to workshop and on-the-road wear. No complicated setup—just power on, calibrate, and scan! Save time, money, and frustration by fixing leaks at the source instead of wasting refrigerant on temporary fixes. Perfect for RV maintenance, HVAC repairs, auto AC service, and more—this leak detector is a must-have tool for anyone working with refrigerant systems. Invest in reliability and precision—get your Halogen Freon Leak Detector today and keep your cooling systems running smoothly! ✅ High-sensitivity heated diode sensor for micro-leak detection ✅ UV light probe + dye compatibility for precise leak localization ✅ Works with all halogen refrigerants (R-134a, R-410a, R-1234yf, etc.) ✅ Audible/visual alarms for real-time alerts ✅ Portable, ergonomic design for easy handling ✅ Ideal for RVs, home AC, cars, and commercial HVAC systems

• Ultra-High Sensitivity & 0.5s Instant Response：Equipped with advanced semiconductor sensors and dual detection technology (diode heating induction + UV ultraviolet detection), this refrigerant leak detector achieves an industry-leading maximum sensitivity of 0.14oz/yr (4g/yr), capable of catching even the tiniest refrigerant leaks. It delivers an ultra-fast 0.5-second response time, enabling immediate, no-wait detection with real-time PPM (0-1000PPM) concentration display on the large backlit LCD screen, ensuring you never miss a leak.
• 30CM 180° Flexible Probe & Durable Design：The 30CM (11.8 inch) ultra-long flexible probe can be bent 180° freely, allowing you to reach tight, hard-to-access spaces in HVAC systems, car air conditioners, and refrigerators with ease. The probe is wrapped in a durable PVC sleeve for long-term rust-free use, while the porous airway design protects the internal sensors, ensuring durability and long service life even in harsh working environments.
• Customizable Threshold Alarm & Multiple Alert Modes：Long-press the SEL button to easily set your desired concentration alarm threshold, with adjustable up/down controls for precise debugging. When the detected concentration exceeds the set limit, the device triggers a clear sound and light alarm, paired with visual screen alerts, eliminating false alarms and ensuring reliable leak notification. It also features an automatic power-off function to extend battery life.
• Wide Compatibility & Versatile Applications：This halogen leak detector works with all halogen-based refrigerants, including R134a, R22, R32, R410a, and more. It is the perfect tool for a wide range of applications: HVAC system maintenance, automotive air conditioner repair, refrigerator and cold storage inspection, and industrial refrigeration equipment testing, making it an essential tool for technicians and DIYers alike.
• Strong Anti-Interference & User-Friendly Operation：Built with strong anti-interference technology, the detector delivers error-free, accurate readings even in complex environments. It features a one-button ℃/℉ switch, automatic power-off, and a simple, intuitive button layout (SEL, APO, ℃/℉, Power) for effortless operation. The ergonomic, handheld design ensures comfortable use during long inspection jobs, while the UV light function provides real-time leak visualization for easier leak location.