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    Refrigeration technology

    A Touch Of Genius.

    The new, digital manifold testo 558s with intuitive app feel.

    The new testo 558s digital manifold
    testo 558s

    Simply smart

    Work intuitively, as you would on your smartphone: The touchscreen and large colour display make configuration and control quicker and more intuitive – as easy as using a smartphone. Data analysis is also made easier and more reliable with new 30-minute trend charts and other easy-to-read graphs. Simply ingenious!

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    testo 558s digital manifold

    Clear visualization of measurement results for easy evaluation and reliable analysis

    Capacitive touchscreen

    Trend curve of different readings over 30 minutes

    Still with the option of operation via keypad

    Clear structure

    Touchscreen - Clear structure

    Easy configuration

    Touchscreen - Easy configuration

    Detailed results

    Touchscreen - Detailed results

    Visual separation of different applications

    Touchscreen - Visual separation of different applications

    Favourites selection

    Touchscreen - Favourites selection

    The smartest manifold ever.

    Touchscreen, colour measurement graphics, intuitive and as easy to use as an app. With the testo 558s, Testo is revolutionizing work on refrigeration, air conditioning and heat pump systems, because this ingenious all-rounder handles all measuring tasks more easily, flexibly and quickly than ever before. Fully networked, compatible with all flammable A3 and A2l refrigerants and always ready for use.

    Get started right away with practical kits

    Fully automatic.

    Fully networked.

    The vision of a smart, networked world that makes jobs much easier. Now a reality! At least when it comes to refrigeration and air conditioning systems. Thanks to our decades of experience, we have managed to develop an HVAC/R world that is so well thought-out that all the tools work together seamlessly and all the applications are quick, easy and in some cases even fully automatic.

    All tools work together seamlessly

    Perfectly equipped for every refrigerant.

    • Compatible with flammable A3 and A2L refrigerants

    • 96+ refrigerants stored in the system

    • New refrigerants are added through OTA updates

    • Favourites selection of the most common refrigerants in the manifold

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    Compatible with flammable A3 and A2L refrigerants

    As intuitive as it gets.

    With consistent precision.


    The testo 558s combines maximum precision and maximum flexibility in operation with ease of use –
    therefore it is setting new standards for all applications involving refrigeration, air conditioning and heat pump systems.

    testo 558s

    Automatic Bluetooth connection through auto-pairing

    Protection class IP 54

    Hybrid charging system consisting of rechargeable (USB-C) and non-rechargeable batteries

    High precision of 0.25 % fs over the entire measuring range (60 bar), including integrated temperature compensation

    Connection to the testo Smart App for easy documentation and fast sending of measurement reports

    Working on refrigeration and air conditioning systems has never been easier.

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

    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.

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    testo Smart App

    Display graphical measured value curve

    Intelligent error analysis

    Save measurement data

    E-mail dispatch of the report

    Configure your measuring instrument

    Smart tools that perfectly complement the

    testo 558s:

    A wealth of expert knowledge

    for practical use.

    The complete refrigeration know-how

    Practical guide

    Go to download

    The complete refrigeration know-how

    Everything you need to know for your work on refrigeration systems

    Download now for free!

    Heat pump know-how

    Practical guide

    Go to download

    Heat pump know-how

    Get all the latest information on heat pumps in 4 modules

    Free to download.