Efficient: The testo 557 is ideal for servicing air conditioners, refrigeration systems and heat pumps and replaces the multitude of tools needed by HVAC/R contractors and technicians
Versatile: Accurately measure high and low pressure, evaporation and condensation temperature and take advantage of the automatic calculation of superheating and subcooling
Convenient: Thanks to the 4-way valve and automatic heat pump mode, there is no need to switch over to different refrigerant hoses, which enables a quick and easy application
Set: Includes two pipe clamp temperature probes, one external pirani probe for vacuum measurement as well as a protective hard case
Refrigeration App: Follow all measurements remotely via Bluetooth from a smartphone or tablet. Send results directly from the job site for a more convenient documentation
