testo 552i - App-controlled wireless vacuum probe

Order-Nr.  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 digitam manifolds and can also be used in conjunction with the 550i via the smart app.

£ 115.00
incl. VAT  £ 138.00

Product Description

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.

testo 552i - App-controlled wireless vacuum probe

  • 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


Delivery Scope

App-controlled testo 552i wireless vacuum probe, including batteries and calibration protocol.
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 12.0 or newer; requires Android 6.0 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

Refrigeration systems, air conditioning systems, heat pumps

  • Evacuation: Graphic progression display of the measurement with indication of the start and differential value

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