The testo 549i Smart Probe is a hose-less, wire-less, pressure probe 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 are used in conjunction with two 115i pipe-clamp temperature probes it is easy to monitor superheat and sub-cooling in AC/refrigeration systems.
Users can read the measurements using the testo Smart Probes App installed on their smart device. The testo 549i easily connects to standard Schrader valves without tools and without hoses,
eliminating any refrigerant loss. The testo 549i works on smart devices with either Android or Apple operating systems at distances up to 60'.

• Includes: testo 549i, Bluetooth refrigeration pressure probe with App, 3 AAA batteries and certificate of calibration
• Measuring range -14 to 870 psi
• Accuracy 0.5% of final value
• Resolution 0.1psi
• Connection 7/16" - UNF
• Overload rel. 940psi