The testo 557s digital manifold with 4-way valve block enables you to carry out your measurements on refrigeration, air conditioning systems, and heat pumps fast. The testo 557s is an all in one solution that includes testo 552i Smart Probe for vacuum measurement. The large display helps evaluate the results in graphic forms. Stored programs guide you through measurements and enables the automatic determination of numerous important system parameters such as superheating/subcooling, target superheat, cooling/heating capacity and many other areas.

Bluetooth probes for temperature, vacuum, and humidity can be easily connected and offer maximum flexibility in their application. In conjunction with the testo Smart App, you can take care of digital documentation directly on site.

Its proven quality and great durability guarantee the continuously high performance of your manifold in all conditions.