Testo 552i Smart Probe Vacuum Gauge

Regular price £122.97 GBP
Manufacturer Part Number: 0564 2552 

  • Identify vacuum quickly and easily by means of the graphical display in the App or on the digital manifold screen
  • Connects automatically via Bluetooth® to the Testo Smart App and digital manifolds
  • Exceptionally compact and reliable thanks to the robust, easy-to-handle housing with IP 54 protection class
  • Easy installation at any service port thanks to the integrated 45° angle

The Testo 552i wireless vacuum probe allows simple measurement of system evacuation via a single service port. The Testo 552i automatically connects to the Testo 550s and 557s digital manifolds and can also be used in conjunction with the 550i via the smart app.

Wireless vacuum measurements via just one service port: The testo 552i app-controlled vacuum probe with Bluetooth enhances the Testo Smart Probes portfolio. It delivers reliable measurement results, is robust and easy to use – the vacuum probe provides optimum support for proper evacuation of refrigeration and air conditioning systems and heat pumps.

  • For wireless, hose-free vacuum measurements on refrigeration and air conditioning systems and heat pumps using just only one service port – with no loss of refrigerant
  • testo Smart App – get an overview of everything: Detect vacuum quickly and easily via a graphic illustration in the app, with an alert in the event of any critical values, e.g. through vibration of the smartphone
  • Automatic connection via Bluetooth: The probe connects to the testo Smart App or to the appropriate digital manifold from Testo, e.g. testo 557s, testo 550s – so you can also read measured values conveniently on your manifold’s large display
  • Convenient, robust housing with protection class IP 54
  • Built-in 45° angle for easy installation at any service port
  • Continuously high performance in all conditions: You can depend on this wireless vacuum probe from Testo – it combines proven Testo quality with excellent robustness
Absolute Pressure

Measuring range

0 to 26.66 mbar /

0 to 20000 micron


±10 micron + 10 % of mv (100 to 1000 micron)



1 micron (0 to 1000 micron) /

10 micron (1000 to 2000 micron) /

100 micron (2000 to 5000 micron) /


absolute: 6.0 bar / 87 psi

(relative: 5.0 bar / 72 psi)

General technical data


142 g


150 x 32 x 31 mm (LxWxH)

Operating temperature

-10 to +50 °C

Protection class


System requirements

requires iOS 13.0 or newer; requires Android 8.0 or newer; requires mobile end device with Bluetooth 4.2

Product colour



10 min*

Battery type

3 AAA micro batteries

Battery life

39 h


7/16“ UNF


Bluetooth® 4.2

Storage temperature

-20 to +50 °C

* when not connected via Bluetooth