• 557s digital manifold with 552i wireless vacuum probe, two 115i wireless temperature probe clamps and four piece hose set
• 4-way valve block for commissioning, servicing and maintenance of refrigeration systems and heat pumps
• Large graphic display shows all results at a glance
• Bluetooth connectivity enables use of testo Smart probes
• Fast and easy pressure value display in analog look
• Integrated calculation of the target super heat
• Refrigerant listing updates automatically using the App
• Testo Smart App available for free on Google Play and Apple App Store
• With testo Smart App, you can take care of digital documentation directly on site

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 super heating/sub cooling, target super heat, 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. The advantage are obvious: • All results at a glance with the large graphic display • Exceptionally compact and reliable thanks to the easy-to-handle, rugged housing with IP 54 protection class • Simple, wireless measurement of vacuum and temperature via automatic Bluetooth® connection • Even greater flexibility for your measurements and documentation with the testo Smart App