• 0560 2549 03
  • Usually ships in 3-5 business days



  • Measures high-side or low-side refrigerant pressure
    • Or both simultaneously with 2 probes
  • Use to measure CFC, HFC, HCFC, N, H2O, & CO2
  • -14 to 870 psi measuring range
    • 0.5% of final value accuracy
    • 0.1 psi resolution
  • Select from psi, bar, MPa, & kPa units
  • 7/16inch - UNF connection
  • Requires mobile device with Bluetooth 4.0
  • 2 year warranty

What's in the Box

  • 3 AAA batteries
  • Calibration cert


The Testo 549i Refrigeration Pressure Probe is a hose-less, wire-less, smart 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. Easily connect to standard Schrader valves without tools and without hoses, eliminating any refrigerant loss.

Users can read the measurements using the Testo Smart Probes App installed on their Android (4.3 or newer) or Apple (iOS 8.3 or newer) smart device at distances up to 60ft away.

The Testo Smart Probes App is a powerful and easy-to-use tool. It allows you to remotely read measurements from up to six Testo smart probes and easily document/report the results. All measurement data is displayed as instrument readings, tables, or graphs. The measurements can be quickly saved as PDF or Excel files. The App creates custom reports which can be saved and/or shared by email.


This product can be used in the following applications: