The Testo 558s Heat Pump Professional Set is a comprehensive solution for the installation, service, and maintenance of heat pumps. It includes the digital technician assistant testo 558s and the refrigerant scale testo 560i, which together enable a user-friendly and efficient workflow. The technician assistant features an intuitive touchscreen interface that allows for easy configuration, control, and documentation of measurement data. Alternatively, the device can also be operated via the testo Smart App or while wearing gloves. Measurement results are displayed on a large color screen in clear graphics and as 30-minute trend curves, facilitating data analysis and evaluation. With a high measurement accuracy of 0.25% Full Scale, the set provides reliable assessments for various applications. Compatibility with a wide range of refrigerants and regular OTA updates ensure that the technician assistant remains up to date.

• Intuitive touchscreen operation for easy handling
• High measurement accuracy of 0.25% Full Scale
• Compatible with flammable refrigerants of classes A3 and A2L
• Over 96 stored refrigerants and regular OTA updates
• Large color display with graphical representation and trend curves.