testo 557s – the manifold with Bluetooth and 4-way valve block for commissioning, servicing and maintenance of refrigeration systems and heat pumps
- All results at a glance thanks to large graphic display
- Automatic Bluetooth connection: Simple, wireless vacuum and temperature measurement
- Fast and easy pressure value display in analogue look
- Robust housing with IP54 protection for maximum reliability in daily use
- All refrigerants always available: The App automatically updates the list.
- Test menu sequences for pressure leak test, vacuum, target superheat, and discharge line temperature
The testo 557s digital manifold with 4-way valve block enables you to carry out your measurements on refrigeration and air conditioning systems and heat pumps. The large display also helps you to evaluate the results in graphic form. Stored programs guide you through the measurement and enable the automatic determination of numerous important system parameters such as superheating/ subcooling, target superheat, cooling/heating capacity and many other areas besides. Bluetooth probes for temperature, pressure 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.
General technical data
Operating temperature -10 to +50 °C
Storage temperature -20 to +60 °C
Battery type 4 AA microcells
Battery life 250 h with no illumination, no Bluetooth® 100 h with illumination and Bluetooth®
Auto power off After 10 minutes when not connected via Bluetooth
Dimensions 229 x 112.5 x 71 mm
Weight 1243 g
Protection class IP54
Bluetooth technology/range
Bluetooth® 5.0/150 m Compatibility requires iOS 11.0 or newer/Android 6.0 or newer requires mobile terminal device with Bluetooth® 4.0
Sensor types
Pressure Temperature
Measuring range -1 to 60 bar -50 to +150 °C
Accuracy
(at 22 °C) ±0.5% fs ±0.5 °C
Resolution 0.01 bar 0.1 °C
Probe connections 3 x 7/16″ – UNF 2 x plug-in (NTC)
+ 1 x 5/8″ – UNF
Overload 65 bar –
