High Sensitivity for New Refrigerants: Detects the latest A2L and low-GWP refrigerants used in modern heat pumps and HVAC systems, including R32, R454B, R410A, R407C, R1234ze, R290, and R600a. Three adjustable sensitivity modes with a maximum sensitivity of 0.14 oz./yr ensure accurate detection of even the smallest refrigerant leaks. Designed for Heat Pump Engineers: Specially engineered for ASHP (Air Source Heat Pump) installation and service technicians. The 16-inch flexible probe allows you to reach tight or hidden areas inside outdoor units where leaks commonly occur. Real-Time Visual Detection: The 2.6-inch colour display features a unique bar graph mode that visually indicates gas concentration and changes colour as the probe approaches the leak source. Clear, intuitive visual feedback for both indoor and outdoor service conditions. Audible & Visual Alarms + Mute Option: Visual and audible alarms increase with the refrigerant concentration, helping identify leaks even in noisy environments. Press the MUTE button to silence the buzzer when working indoors or near customers. Reset & Peak Functions for Accuracy: The Reset function removes background gas interference, eliminating false positives during continuous leak checks. The Peak function records the highest leak level detected—ideal for tracking multiple leak points in one session. 3 modes of sensitivity with maximum sensitivity up to 0.14oz./yr. 16 inch sensor probes of the hvac leak detector that allows you to reach hard-to-reach areas., Weight: 2.20462262 pounds, Manufacturer: Therm La Mode