Robinair’s A/C leak detectors are compatible with nearly all refrigerants used today, including R1234-yf and R-134a. The leak detectors, LD3, LD5 and LD7, meet all industry standards and are now available in North America to help technicians find leaks faster. Each of the new leak detectors feature an audible alarm with a stable, long-life sensor that lasts up to 10 years. Equipped with an automatic calibration and the ability to reset to ambient, the leak detectors also include three adjustable sensitivity levels and a low battery indicator.
Link: Robinair