testo 552 - Digital Vacuum Gauge (Bluetooth)

Order-Nr.  0560 5522

  • 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.

Delivery time: 3 – 5 working days

Shipping costs

£ 139.00
incl. VAT  £ 166.80

Product Description


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 Probes 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 Probes App
  • Measurement of H2O evaporation temperature
  • Optical alarm when limit values are exceeded


General technical data


500 g


160 x 110 x 50 mm

Operating temperature

-10 to +50 °C

Protection class


System requirements

requires iOS 8.3 or newer; requires Android 4.3 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

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)


Connection cable with MiniDin connection

Order Number: 0554 5520

£ 21.00
incl. VAT  £ 25.20

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.

Documenting measurements

Via a Bluetooth interface, the testo 552 connects with the testo Smart Probes 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.

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.

Evacuating refrigeration systems

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