No Products in the Cart
| Testo 550s | Testo 557s | Testo 550i | |
 |
 |
 |
|
| Valve block | 2-way | 4-way | 2-way |
| All application-specific measurement values at a glance thanks to the large graphic display |
Yes | Yes | No |
| Operation and documentation with testo Smart App |
Yes | Yes | Yes |
| Bluetooth for connection with wireless probes and smartphone |
Bluetooth 5.0 (range up to 150 m) |
Bluetooth 5.0 (range up to 150 m) |
Bluetooth 5.0 (range up to 150 m) |
| Compatible with all wireless probes for temperature, vacuum, humidity |
Yes (with automatic connection) |
Yes (with automatic connection) |
Yes (with automatic connection) |
| Compact outer dimensions and one-hand operation |
Yes | Yes | Yes |
| Protection class | IP54 | IP54 | IP54 |
| Identical pressure measuring range HP/LP | up to 60 bar | up to 60 bar | up to 60 bar |
| Pressure measurement accuracy | > 0.5 % of f.s.v. | > 0.5 % of f.s.v. | > 0.5 % of f.s.v. |
| Integrated temperature measurement | Yes (up to 2 temperature probes + Bluetooth probe) |
Yes (up to 2 temperature probes + Bluetooth probe) |
Yes (up to 2 temperature probes + Bluetooth probe) |
| Target superheat in the manifold or testo Smart App |
Yes | Yes | Yes (testo Smart App only) |
| Measurement data documented and sent via testo Smart Probes App |
Yes | Yes | Yes |
| Number of stored refrigerants | 90 | 90 | 90 |
| Refrigerant update | automatically via testo Smart App |
automatically via testo Smart App |
automatically via testo Smart App |
| Temperature-compensated tightness testing with temperature probe |
Yes | Yes | Yes |
| Vacuum measurement with vacuum probe testo 552i |
Yes | Yes | Yes |
| Suitable for A2L refrigerants | Yes | Yes | Yes |
| PC software testo DataControl (optional) | Yes | Yes | Yes |
