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Measurement solutions for refrigeration technology

Your job: effortless.

Smart & simple refrigeration measurements – with perfectly networked instruments.

Measuring instruments for refrigeration technology from Testo

Fully automatic

Fully networked

Networked systems that work together seamlessly make your work on refrigeration, air conditioning and heat pump systems much easier and more efficient. With just one click, all measurement data can be viewed centrally in the manifold or the testo Smart App. This also greatly simplifies the documentation process, which can be carried out directly on site.

testo 558s digital manifold

Digital manifold

TRMS clamp meter testo 770-3

TRMS clamp meter

Smart Probes

Smart Probes

testo 565i Smart Vacuum Pump

Smart vacuum pump

Refrigerant scales

testo 560i

Digital refrigerant scale

The new testo 558s digital manifold

Work as intuitively as on a smartphone

  • Intuitive operation via touchscreen

  • Additional operating option via keypad for working with gloves

  • New clear visualization of readings and 30-minute trend curves

  • Everything in one instrument: All measurement applications in one manifold, thanks to wireless connection to the entire refrigeration portfolio

  • Compatible with flammable class A3 and A2L refrigerants

Ready to go immediately – with the Testo kits

Overview of the main applications

Carrying out long-term measurements on refrigeration systems

Manifolds and Smart Probes

Find out more

Refrigeration circuit control

Efficient and reliable testing of systems

Evacuating refrigeration systems

Vacuum gauges

Find out more

Evacuating/vacuum measurement

Fully automatic evacuation and high-precision pressure measurement

Charging refrigeration systems

Refrigerant scales

Find out more

Charging

Automatic and precise charging according to target value

Testing electrical parameters in refrigeration systems

Electrical measuring instruments

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Electrical testing

Safe testing of all electrical parameters of equipment and components

Detecting leaks in refrigeration systems

Leak detectors

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Leakage testing/tightness test

Reliable detection of the smallest leaks for all common refrigerants

Measuring temperature in refrigeration systems

Thermometers

Find out more

Temperature measurement

Flexible temperature measurement of components and ambient air

The Testo tools in use

With the testo 558s, the system density can be assessed easily and reliably, thanks to the clear visualization of pressure values and temperature compensation.

Thanks to the large colour display and wireless connection to the probes, all important parameters are visible at a glance. The 30-minute trend curves also ensure even more reliable analysis.

Make your work easy – with the testo 565i.

Fully automatic evacuations with auto-stop function and self-starting vacuum hold test.

testo Smart App

The whole world.

In one App.

Easier, faster, smarter. The testo Smart App brings all the tools and measurements together – and the documentation can also be conveniently managed using a smartphone or tablet. Experience end-to-end connectivity, wireless measurements and all your data at a glance.

Other measuring instruments for refrigeration, air conditioning and heating professionals

Digital refrigerant scale

Refrigerant scales

testo 560i

Digital refrigerant scale

Smart vacuum pump

Vacuum pump

testo 565i

Smart vacuum pump

Testo’s electrical measuring instruments

Clamp meter

testo 770-3

Electrical measuring instruments

Leak detector testo 316-3

Leak detectors

testo 316-3

Leak detectors

High-pressure gauge operated via smartphone

High pressure measuring instrument

testo 549i

Smart probes

HVAC/R Magazine 02/2025

Free of charge, full of value.

Our latest HVAC/R magazine gives you insight into the most important technological trends in the industry – and the tools you need to stay ready for change. You’ll also find expert tips and real-world examples that help you work more efficiently with testo instruments.

All about refrigeration measuring technology

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Contact
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Sagveien 21 A
0459Oslo
Norway
+47 22 99 20 90

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