Tracer Products' TP-9360 PRO-Alert electronic refrigerant leak detector features high-performance, heated-diode sensor technology to accurately detect refrigerant leaks as small as 0.25 oz. per year 7g/year). It is sensitive to both R-12 and R-134a refrigerant, and is certified to meet SAE J1627 standards. The tool also features dual-sensitivity controls, self-calibration, 17" long, chrome-plated, flexible metal probe gets into tight spots and holds its position for thorough inspections; and built-in positive displacement pump draws a test sample into the detector for fast, accurate sensing.