The testo 550 Refrigeration System Analyzer is a high performance RSA that accurately performs temperature and pressure measurments in seconds. It automatically calculates subcooling and superheat for 34 refrigerant profiles in real time. Built rugged for the field, the testo 550 gives you the accuracy and repeatability you've come to expect from testo at an affordable price. Performance, Value and Speed...Cool. >Click here | 
