Final answer:
Electronic leak detectors for R-1234yf should have a sensitivity level of 0.1 oz/yr to effectively identify even small leaks.
Step-by-step explanation:
Electronic leak detectors designed to detect R-1234yf refrigerant leaks should meet the sensitivity level of 0.1 oz/yr. This ensures that even the smallest leaks, which could lead to a reduction in system efficiency and potential environmental harm, are detected promptly for repair. The sensitivity level is crucial for maintaining system performance and environmental safety.