The HVAC Guide® System Analyzer is the industry’s first easy to use hand-held tool that guides technicians step-by-step through critical HVAC/R tests including: Target Superheat, Superheat, Subcooling, Target Evaporator Exit Temperature and Combustion Analysis. Simply enter data on the INPUT form , either automatically with the use of compatible accessory head instruments or manually using your existing tools such as a pressure gauge. Read the results and get possible solutions off the OUTPUT form. Stores up to 200 tests. Upload tests to your PC to print out customer work orders and maintain HVAC/R system data using the included software. Visit the HG1 or HG2 product page to watch the live HVAC Guide® System Analyzer superheat demo and the training demo.