Testo 552 Digital Vacuum Gauge with Bluetooth – 0560 5522

The Testo 552 is a dedicated digital vacuum gauge for evacuation work on refrigeration systems and heat pumps, giving you accurate micron readings, a clear on-gauge display, Bluetooth monitoring through the testo Smart App, and visual alarm support when your target vacuum threshold is exceeded.

Browse our full vacuum gauges range, compare the wider Testo collection, or contact the team via our contact page if you want help choosing between a dedicated gauge and an app-first wireless probe.

Quick summary

The Testo 552 suits HVAC-R technicians who want a rugged standalone micron gauge with its own display, plus wireless monitoring in the app, so evacuation can be verified properly instead of guessed by pump sound or time alone.

Best for

• Evacuating refrigeration systems and heat pumps
• Installers and service techs who want dedicated micron proof on every job
• Teams that prefer a standalone gauge with display, not app-only workflow
• Commissioning and restart work where moisture removal and vacuum stability matter

Not ideal for

• Techs who want the lightest possible app-only vacuum tool
• Buyers looking for a full digital manifold rather than a dedicated vacuum gauge
• Users who want to rely on analogue gauges for deep vacuum verification

Why tradies choose the Testo 552

• Dedicated micron proof: built specifically for evacuation work, not as a side feature buried inside another instrument.
• Bluetooth monitoring: watch the vacuum trend wirelessly in the testo Smart App while keeping the gauge at the right connection point.
• Visual alarm and backlit display: easier to track threshold targets and see readings in poor lighting.
• Water evaporation temperature display: helps you judge whether dehumidification is progressing properly.
• Rugged field build: IP42 protection helps it cope better with site moisture and dirt than a flimsy budget gauge.
• Better workflow than guessing: ideal when you want proof of dryness and stability, not just a timer-based evacuation routine.

Key specs

Compatibility and setup notes

The Testo 552 is a dedicated evacuation tool. It is strongest when connected on the system side so you can verify the vacuum inside the system rather than only what the pump is doing. It is not a replacement for a vacuum pump or a full manifold set, but it is a major upgrade over trying to judge evacuation by time alone.

If you are building a complete evacuation setup, pair it with a suitable vacuum pump and compare other micron gauges if you want an app-only alternative.

What’s included

• Testo 552 digital vacuum gauge with Bluetooth
• 2 x AA batteries
• Instruction manual

What you may also need

• Vacuum pumps – for faster pull-downs and proper evacuation workflow.
• Vacuum gauges – compare other micron gauge styles and price points.
• Testo 552i wireless vacuum probe – if you prefer a smaller app-first option.
• Micron gauge guide – practical background on what the numbers mean and where to connect the gauge.
• Testo vacuum gauge range guide – useful if you are choosing between the 552 and 552i.

Official references

• Official Testo 552 product page
• ARCtick refrigerant handling licence information

Frequently asked questions

Is the Testo 552 a standalone vacuum gauge?

Yes. It has its own display, so you can read the vacuum directly on the instrument while also monitoring it wirelessly in the testo Smart App.

What is the measuring range in microns?

The Testo 552 measures from 0 to 20,000 micron.

Is this mainly for refrigeration and heat pump evacuation?

Yes. Testo positions it specifically for evacuating refrigerant systems and heat pumps.

Does it replace a vacuum pump?

No. It proves the quality of the evacuation, but you still need a proper vacuum pump to create the vacuum.

Should I choose the Testo 552 or the 552i?

Choose the 552 if you want a dedicated screen on the instrument. Choose the 552i if you prefer a lighter, app-first probe workflow.

Is refrigerant work in Australia regulated?

Yes. Any work on RAC equipment that carries the risk of refrigerant being emitted requires the appropriate refrigerant handling licence in Australia.