Adjusting AC/refrigeration systems

The advent of digital technology means huge quality improvements when it comes to the adjustment of AC/refrigeration systems or heat pumps.

Digital manifolds provide high-precision temperature and pressure measurements, determine subcooling and superheating, but also enable reliable evacuation of the system through accurate vacuum measurement.

And the convenient testo AC/refrigeration App makes commissioning, maintenance or repair even quicker!

All the digital manifolds at a glance

One measuring instrument – all parameters

Commissioning, maintenance and/or repair? No matter where the focus of your work on AC/refrigeration systems and heat pumps is, Testo has the appropriate digital manifold for you.

Entry-level digital manifold

testo 549 digital manifold

Are service and maintenance of refrigeration systems your thing? This digital manifold will mean you can work efficiently, determine superheating and subcooling in real time and avoid manual calculations which are prone to errors.

  • 60 common refrigerants stored in the instrument
  • Calculation of condensation and evaporation temperatures in real time
  • Temperature-compensated leakage testing

Digital manifolds for all-rounders

testo 550 digital manifold

It is not for nothing that these are our best-selling manifolds: They offer everything for all-round service and can be combined with the convenient testo AC/refrigeration App.

  • Remote monitoring and measurement documentation by smartphone and tablet
  • 60 common refrigerants stored in the instrument, easy updates via App!
  • 5 year warranty

Digital manifold for commercial

testo 570 digital manifolds

Our 4-way manifold for commercial enables accurate storage and documentation of pressure measurements, temperature measurements and other important parameters of an AC/refrigeration system in the instrument.

  • Optional connection of clamp meter, oil pressure probe and up to three temperature probes
  • Integrated vacuum measurement
  • Continuous recording of readings for up to 999 hours

Here you can see which digital manifold is the right one for your requirements:


Our tip: We recommend the testo Smart Probes AC/refrigeration set for fast testing of an AC/refrigeration system.

Practical tips, information and training videos

Application example for digital manifolds

Find out here how easy and efficient it is to use Testo’s digital manifolds. Download free of charge now!

AC/refrigeration technology practical brochure

Everything you need to know about working efficiently on AC/refrigeration systems or heat pumps. Prepared for you in a compact format and as a free download.

This is how it works: Vacuum measurement with the testo 570

See here how to initiate a perfect AC/refrigeration system evacuation using the testo 570 digital manifold.

This is how it works: Tightness measurement with the testo 570

Here you can discover how to carry out a reliable and fast pressure resistance test on an AC/refrigeration system using the testo 570 digital manifold.

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