Testo 557s Smart Digital Manifold (Choice of kit)



  • Fast and simple pressure and temperature measurment
  • Small, lightweight and IP54 rated
  • All results on one screen
  • Bluetooth connection for wireless measurement
  • Four-way valve block
More Information
Warranty1 year
Price MatchNo

Testo 557s Smart Digital Manifold

Testo - Win A Van

testo 557s – the manifold with Bluetooth and 2-way valve block for commissioning, servicing and maintenance of refrigeration systems and heat pumps. The testo 557s can be used for applications with A2L refrigerant, taking into account the relevant legislation, norms and guidelines for refrigeration systems

The testo 557s digital manifold with 2-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.

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.

Testo 557s key features

  • Large display shows everything at once
  • Compact and reliable with IP 54 rating
  • Wireless measurement of vacuum and temperature via automatic Bluetooth connection
  • Guided measurement menus for target superheat, vacuum and pressure loss
  • Refrigerant management in the App with favourites and automatic updates

Testo 557s measurement specification


  • Range: -1 to 60 bar
  • Accuracy: ±0.5% fs
  • Resolution: 0.01 bar
  • Probe connections: 3 x 7/16" – UNF + + 1 x 5/8" – UNF
  • Overload: 65 bar


  • Range: -50 to +150°C
  • Accuracy: ±0.5°C
  • Resolution: 0.1 °C
  • Probe connections: 2 x plug-in (NTC)

Testo 557s general specifications

  • Operating temperature: -20 to +50 °C
  • Battery life: up to 250 hours
  • Auto power off after 10 minutes
  • Dimensions: 210 x 121 x 60mm
  • Weight: 826 grams
  • IP54 rated
  • Bluetooth 5.0 / 150m

The Testo 557s is available in a range of kit options with different accessories. The contents for each testo 557s kit is listed below…

Testo 557s Smart Kit

  • testo 557s digital 4-way manifold
  • Batteries (4 x AA)
  • Calibration protocol
  • 2 x testo 115i wireless Bluetooth clamp thermometers
  • 1 x testo 552i vacuum probe
  • Transport case
  • Instruction manuals

Testo 557s Smart Kit with filling hoses

  • testo 557s digital 4-way manifold
  • Batteries (4 x AA)
  • Calibration protocol
  • 2 x testo 115i wireless Bluetooth clamp thermometers
  • 1 x testo 552i vacuum probe
  • Hose filling set with 4 hoses
  • Transport case
  • Instruction manuals
Write Your Own Review
Only registered users can write reviews. Please Sign in or create an account