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Testo 550 Digital Manifold from Testo

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Testo  offers the Testo 550 digital manifold designed for temperature and pressure measurements on refrigeration systems as well as heat pumps.

The new Testo 550 digital manifold offers an unbeatable price-performance ratio and advantages such as:

Just switch on, measure and read

  • Large figures allow the values to be read off the display at a glance
  • Two temperature-compensated pressure sensors measure high and low pressure quickly and precisely while automatically calculating the temperatures
  • Two temperature inputs guarantee the simultaneous calculation and display of superheating and subcooling
  • The temperature can additionally be displayed: a simple button is used to switch between measurement tasks

Commissioning benefits

  • The vacuum display supports the user in the evacuating system

User comfort

  • The backlit display ensures the user always has a clear view of the measurement values even in the dark
  • Two practical direct buttons offer the display of MIN/MAX/MEAN and instant access to 31 selectable refrigerants
  • Refrigerant flow can be monitored in the integrated sight glass
  • The three hose holders are used for easy attachment of the refrigerant hoses to the valve block

Robust construction

  • Testo 550 has a robust 2-way valve block with three connections and three hose holders
  • The solid housing protects the unit from impact and damage
  • During measurement, the suspension hook provides secure attachment of the manifold
  • The new digital manifold supports the user in all measurements tasks including condensation and evaporation


  • The vacuum display supports in the evacuation of the system and indicates the vacuum reached

Heat pump mode

  • Automatically switches the display of high and low pressure readings

Superheating and subcooling

  • Simultaneous calculation of superheating and subcooling with two externally connectable probes to save critical time

Temperature-compensated tightness test

  • Users can test the Testo 550 digital manifold for tightness by measuring the system pressure and the ambient temperature

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