Testo Heat pumps

The digital technician's aid testo 557s enables wireless measurements and digital documentation with a large graphic display. You receive the digital technician's aid testo 557s with a 4-way valve block, 1 x wireless vacuum probe testo 552i, 2 x wireless clamp temperature sensors testo 115i, and a filling hose set of 3 x 7/16 UNF and 1 x 5/8 UNF. With the wireless refrigerant scale testo 560i, the intelligent refrigerant valve, the digital technician's aid testo 557s, and the testo Smart App, refrigeration systems are filled automatically, quickly, and precisely. By entering the filling program, target values for superheat, subcooling, or weight in the app, the scale and valve take care of the rest for you. The advantages of the testo 557s heat pump all-rounder set: You can carry out your daily tasks related to heat pumps wirelessly, easily, and reliably. Thanks to the included Bluetooth vacuum probe, you can even measure vacuum without cables and hoses. All data is displayed on the large graphic display or via the testo Smart App on your smartphone or tablet.