Are you primarily entrusted with the commissioning or maintenance of refrigeration systems or heat pumps? If so, the testo 557 is the ideal digital vacuum gauge for you: like the testo 550, this manifold replaces multiple tools in the refrigeration industry and can be connected to a practical app. As well as the features of the testo 550 manifold, the testo 557 offers a high-precision external Pirani gauge for vacuum measurement: this enables the quick, safe evacuation of refrigeration systems and heat pumps.
State-of-the-art technology, to make your work easier: the digital manifold in detail
The testo 557 4-way digital vacuum gauge was developed to relieve your workload, to make your work more efficient, and to deliver more accurate measurement results – as well as to offer your customers services that are even more reliable. See all the advantages at a glance:
testo 557 4-way digital vacuum gauge including two clamp temperature probes, precise external Pirani gauge for vacuum measurement, transport case, calibration protocol, batteries and app (can be downloaded).
Technical data | |
---|---|
Measuring range |
-50 to +150 °C |
Accuracy |
±0.5 °C |
Resolution |
0.1 °C |
Probe connection |
2 x Plug-in (NTC) |
Technical data | |
---|---|
Measuring range |
-1 to 60 bar |
Accuracy |
±0.5 % fs |
Resolution |
0.01 bar |
Probe connection |
3 x 7/16" – UNF + 1 x 5/8'' – UNF |
Overload rel. (high pressure) |
65 bar |
Technical data | |
---|---|
Measuring range |
0 to 20000 micron |
Accuracy |
± (10 micron + 10 % of mv) (100 to 1000 micron) |
Resolution |
1 micron (0 to 1000 micron) |
Technical data | |
---|---|
Protection class |
IP42 |
Warranty |
2 years |
Battery life |
250 h (without illumination, without Bluetooth®, without vacuum probe) |
Pressure media |
CFC |
Refrigerants in instrument |
R1234ze; update via App; R420A; R508B; R424A; R507; R11; R422A; R404A; Ra11A; R417A; R407B; R22; R422C; R290; R402B; R14; R123; R718 (H₂O); R401B; R134a; R407D; R409A; R412A; R422B; R152A; R401C; R407A; R12; R437A; R407C; R410A; R421B; R1234yf; R407F; R414B; R503; R416A; R422D; R13B1; R508A; R125; R744 (CO₂); R161; R401A; R502; R434A; R402A; R427A; R600a; R23; 60 profiles:; R413A; R32; R600; R438A; R406A; R408A; R142B; R227; R426A; R421A |
System requirements |
requires iOS 7.1 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0 |
Storage temperature |
-20 to +60 °C |
Weight |
1200 g |
Dimensions |
220 x 125 x 70 mm |
Operating temperature |
-20 to +50 °C |