New Refrigerant Scale Breaks the Mold with Expanded Durability, Accuracy, and Portability to Support HVACR Field Professionals The SR47 replaces the industry workhorse, Fieldpiece’s SRS3. The newly upgraded wireless refrigerant scale is yet another game-changer to make HVACR industry tools more efficient and effective with the ultimate performance and durability in a compact, portable design. Industry-leading battery life, wireless range, and accuracy offer unmatched reliability and convenience.