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 particularly fast. 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 superheat, pressure drop test or evacuation.
Thanks to the testo 552i Bluetooth vacuum probe included in the kit, the testo 557, as the the first manifold ever, makes wireless vacuum measurement possible. Bluetooth probes for temperature, pressure and humidity can be easily connected directly to the instrument and offer maximum flexibility in their application.
In conjunction with the testo Smart App, you can take care of digital documentation directly on site. In addition to this, you always have the current refrigerants available to you, and can set your favourites and transfer them to the instrument. Its proven quality and great durability guarantee the continuously high performance of your manifold in all conditions.
Key Features
- Up to 90 selectable refrigerants (Include most popular R-410A, R22, R32)
- Comply with the permissible measuring range (-1 to 60 bar/-14.7 to 870 psi)
- Compact, easy-to-handle, robust housing with IP 54 protection class
- 4-way valve block with four connections (Pressure ports: 3 x 7/16″ – UNF + 1 x 5/8” – UNF)
- External vacuum probe for faster and more reliable evacuation of the system
- Wireless temperature and vacuum measurements via automatic Bluetooth connection
- Measures high side / low side pressures and temperatures
- Guided measurement menus for target superheat, vacuum and pressure loss
- On-site monitoring and documentation via testo Smart App
- Large graphic display to evaluate results in graphic form
- 90 selectable refrigerants in the instrument
- Refrigerant management in the App with favourites and automatic updates
Testo 557s Specifications
| Temperature | |
| Measuring range | -50 to +150 °C |
| Accuracy | ±0.5 °C |
| Resolution | 0.1 °C |
| Probe connection | 2 x Plug-in (NTC) |
| Pressure measurement | |
| 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 |
| General technical data | |
| Weight | 1243 g |
| Dimensions | 229 x 112.5 x 71 mm (LxWxH) |
| Operating temperature | -20 to +50 °C |
| Protection class | IP54 |
| Product colour | Black |
| Auto-off | 10 min* |
| Battery type | 4 x type AA batteries |
| Battery life | 250 h with no illumination, no Bluetooth®h (without illumination, without Bluetooth®, without vacuum probe); 100 h with illumination and Bluetooth® |
| Radio range | 150 m |
| Pressure media | CFC |
| Refrigerants in instrument | R1234yf; R744 (CO₂); R437A; R503; R452A; R500; R114; R444B; R407H; R422B; R434A; R410A; R290; R449A; R401B; R407F; R13; R123; R718 (H₂O); R404A; R125; R416A; R421B; R422C; R448A; R22; R407A; R409A; R12; R454B; R414B; R442A; R1233zd; R420A; R424A; R458A; R427A; R450A; R124; R502; R1234ze; R600a; R23; R402B; R455A; R454A; R407C; R453a; R513A; R401A; R422D; R402A; R507; R454C; R408A; R421A; R134a; R32; R452B; R438A |
| System requirements | requires iOS 7.1 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
requires iOS 11.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0 |
| Refrigerants update via App | R11; FX80; I12A; R1150; R1270; R13B1; R14; R142B; R152A; R161; R170; R227; R236fa; R245fa; R401C; R406A; R407B; R407D; R41; R411A; R412A; R413A; R417A; R417B; R417C; R422A; R426A; R508A; R508B; R600; RIS89; SP22 |
| Storage temperature | -20 to +60 °C |
| * when not connected via Bluetooth | |
Delivery Scope
- testo 557s digital 4-way manifold including batteries (4 x AA) and calibration protocol
- 1 x testo 552i wireless Bluetooth vacuum probe
- 2 x testo 115i wireless Bluetooth clamp thermometers
- Hose filling set with 4 hoses
- Transport case
- testo Smart App (free download)
- Instruction manuals
kit components
testo 557s – Smart digital manifold with Bluetooth and 4-way valve block
Order-Nr. 0564 5570
- All results at a glance thanks to the large graphic display
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Exceptionally compact and reliable thanks to the easy-to-handle, robust housing with IP 54 protection class
testo 552i – App-controlled wireless vacuum probe
Order-Nr. 0564 2552
- Identify vacuum quickly and easily by means of the graphical display in the App or on the digital manifold screen
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Connects automatically via Bluetooth® to the testo Smart App and digital manifolds
testo 115i – Clamp thermometer operated via smartphone
Order-Nr. 0560 2115 02
- Convenient temperature measurement on refrigeration, air conditioning and heating systems – thanks to wireless connection to your smartphone or tablet
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Fast identification of temperature changes by graphic progression display
testo Smart App
Order-Nr. 0501 5001
- All in one: One app for all Bluetooth®-enabled Testo measuring instruments for air conditioning/refrigeration systems and heat pumps
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Quick and easy: Measurement menus for numerous applications provide optimum support in configuring and carrying out measurements, e.g. superheating/subcooling
