The Testo 549i (0560 1549) Refrigeration Pressure Smart and Wireless Probe is a wireless pressure probe without hoses, suitable for measuring refrigerant charge in AC/Refrigeration systems. It is used for servicing, troubleshooting, and documenting the operation of residential or commercial AC/refrigeration systems. When two 549i probes are used in conjunction with two 115i pipe-clamp temperature probes, it is easy to monitor superheat and sub-cooling in AC/refrigeration systems.






