The Testo 549i is a handy high-pressure meter suitable for use with a smartphone or tablet for the service, fault finding, and installation of air-conditioning and refrigeration systems. The measuring device can be quickly and easily attached directly at the pressure connection. When working on far apart pressure ports, the wireless connection to the smartphone or tablet via Bluetooth significantly simplifies the application. As no hoses are required for measurements, there is no or very little refrigerant loss. Additionally, when used with the Testo 115i clamp thermometer, individual parameters of refrigeration systems, such as superheat, can be calculated. Measurement data can be conveniently read on the device via the Testo Smart Probes App. The app also allows for automatic calculation of evaporating and condensing temperatures. Measurement data is displayed in either graph or table format and can be exported as PDF or Excel files.