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testo 552 - Digital Vacuum Gauge (Bluetooth)

0560 5522
£ 174.00 £ 208.80
  • Control and read complete measurement via smartphone
  • Extremely precise, extremely rugged, extremely practical – with visual alarm and backlit display
  • App for creating on-site reports
  • Sending measurement protocols by e-mail
  • High-precision measuring technology
  • Extremely robust
  • Extremely precise, rugged and practical: the testo 552 digital vacuum gauge. Ideal for evacuating refrigerant systems or heat pumps.
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      Control and read complete measurement via smartphone


    The testo 552 is a digital vacuum measuring instrument for the evacuation of refrigeration systems and heat pumps. It measures even the smallest absolute pressures and provides highly precise information on the status of the dehumidification of a system (removal of foreign substances, incl. oils or foreign gases). Its robust construction makes it suitable for daily use, and protects from dirt and water.
    In addition to the above, the new version of the testo 552 connects via Bluetooth with the testo Smart App on your smartphone or tablet. This allows you to monitor the absolute pressure reached during the evacuation and measurement results are documented in the App and sent by e-mail report.
    • Reporting function via connection to testo Smart App
    • Measurement of H2O evaporation temperature
    • Optical alarm when limit values are exceeded

    Absolute Pressure

    Measuring range
    0 to 26.66 mbar /
    0 to 20000 micron
    ±(10 micron + 10 % of mv) (100 to 1000 micron)
    100 micron (2000 to 5000 micron) /
    1 micron (0 to 1000 micron) /
    10 micron (1000 to 2000 micron) /
    absolute: 6.0 bar / 87 psi
    (relative: 5.0 bar / 72 psi)

    General technical data

    500 g
    160 x 110 x 50 mm
    Operating temperature
    -10 to +50 °C
    Protection class
    System requirements
    requires iOS 11.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0
    Product colour
    Battery type
    2 AA
    Battery life
    50 hrs (without Bluetooth/backlighting)
    2 x 7/16“ UNF
    Bluetooth® 4.0 wireless technology
    mbar; micron; mmHg; Torr; inHg; inH20; hPa; Pa
    Measuring rate
    0.5 s
    Storage temperature
    -20 to +50 °C

    Complying with manufacturer's specifications

    Some manufacturers specify exactly what the absolute pressure must be for you to evacuate your air conditioning systems how long this pressure must be maintained. Compliance with these specifications is simple and easy thanks to the flexible setting of the alarm threshold in the testo 552.

    testo 552

    Documenting measurements

    Via a Bluetooth interface, the testo 552 connects with the testo Smart App on your smartphone or tablet. This allows you to monitor the absolute pressure reached during the evacuation conveniently and wirelessly. In addition to this, the measurement results can be quickly documented in the App and sent by e-mail.
    When you use the testo 552 in combination with the testo 570 digital manifold, you can save the testo 552's measuring values or display them directly on a laptop via the optional EasyKool software.
    testo 552

    Ensuring dehumidification

    The testo 552 not only measures the pressure, but also gives the water evaporation temperature associated with it. In addition, it measures the ambient temperature and displays the temperature difference. This means you can quickly check whether the humidity in the system is evaporating and dehumidification is progressing properly.

    testo 552

    Evacuating refrigeration systems

    Using the testo 552, you can carry out evacuations of refrigeration systems quickly, flexibly and with a high level of accuracy.

    testo 552

    • (1) This is a demo version which will run 30 days on your computer. Within that time the software can be upgraded with a licence key to a full version.(2) The software runs with operating systems Microsoft Windows 7, Windows 8, Windows 10. (3) The software needs the > Microsoft .NET Framework 4.0. It has to be installed first if it is not already installed on your computer. The installation package can be downloaded from the Microsoft webpage.(4) This software supports the analyzers testo 556, testo 560 and testo 570(5) For your own security we recommend a backup of your data before running an update.