The Ritchie Engineering YELLOW JACKET Refrigeration System Analyzer display reads in analog, digital or a combination of both, and monitors two pressures, two live temperatures, subcooling and superheat, and saturation temperatures (liquid and vapor) for 84 refrigerants. This refrigeration system analyzer comes standard with the TITAN 4-valve manifold, an external, replaceable vacuum sensor; battery holder; and a boot, bumper, plug and sensor/probe boots, all in a blow-molded instrument case.