Testo 558s: The digital manifold that revolutionizes measurement in HVAC/R systems
The new digital manifold Testo 558s simplifies the work of HVAC/R technicians with intuitive measurements, wireless connection and maximum precision

When it comes to refrigeration and air conditioning, having precise and efficient tools makes the difference to ensure the correct functioning of the systems. Testo, a leading company in measurement solutions, has launched the new digital manifold Testo 558s , an innovative tool that promises to make the work of technicians simpler, faster and more accurate.
With a cutting-edge design , advanced functions and full wireless connectivity , the Testo 558s presents itself as the reference point for those working in the HVAC/R sector, thanks to its intuitive interface and compatibility with a wide range of refrigerants.
An intelligent and interconnected manifold
The new Testo 558s has been designed to offer maximum ease of use. Thanks to the colour touchscreen , data analysis is clear and immediate, while the configuration of the instrument is as simple as using a smartphone. Measurements can be monitored in real time via detailed graphs and 30-minute trend diagrams , which help the technician to identify any anomalies in the systems.
One of the strengths of the Testo 558s is its advanced connectivity : the device can communicate wirelessly with other instruments in the Testo range, allowing seamless, cable-free integration. All measurement tasks are centralised in the Testo Smart App , where you can configure the manifold, manage data and generate reports directly from your smartphone or tablet.
Testo 558s: Technical specifications and benefits for professionals
The Testo 558s is equipped with a 4-way valve block that enables extremely precise measurement and control tasks. With its updated refrigerant library, it supports over 96 refrigerants and offers the possibility of adding new gases with Over-The-Air (OTA) updates.
Among its main technical features we find:
- Intuitive touchscreen : fast and immediate navigation like on a smartphone.
- Wireless connection : compatibility with wireless temperature, pressure and vacuum probes.
- Hybrid charging system : uses rechargeable or traditional batteries to ensure continuous use.
- High precision : accuracy of ±0.25% FS over a range of 60 bar.
- Data logging : Up to 72 hours of data recording capability for continuous monitoring.
- Compatibility with A2L and A3 refrigerants: suitable for the latest environmental regulations.
- Digital document management : All data is stored in the Testo Smart app for easy management.
These features make the Testo 558s an ideal solution for both maintenance work and new installations of air conditioning and refrigeration systems.
An ally for cold technicians
Testo's mission is to simplify the life of HVAC/R technicians by offering increasingly innovative and interconnected tools. The new 558s digital manifold is the result of continuous research and development, in collaboration with industry professionals, to meet the most advanced measurement needs.
Thanks to its ability to work in synergy with other instruments in the Testo range, the precision of its measurements and the possibility of constant updates, the Testo 558s represents a strategic investment for anyone who wants to improve the efficiency and reliability of refrigeration and air conditioning systems.
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