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Description
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
| Brand | Testo |
| Model | 552 |
| Part number | 0560 5522 |
| Type | Digital vacuum gauge with Bluetooth |
| Measuring range | 0 to 26.66 mbar / 0 to 20,000 micron |
| Accuracy | ±(10 micron + 10% of measured value) from 100 to 1000 micron |
| Resolution | 1 micron (0 to 1000 micron), 10 micron (1000 to 2000 micron), 100 micron (2000 to 5000 micron) |
| Overload | Absolute 6.0 bar / 87 psi |
| Connections | 2 x 7/16" UNF |
| Protection class | IP42 |
| Operating temperature | -10 to +50 °C |
| Storage temperature | -20 to +50 °C |
| Battery type | 2 x AA |
| Battery life | 50 hrs (without Bluetooth/backlighting) |
| Interface | Bluetooth 4.0 |
| System requirements | iOS 11.0 or newer, Android 6.0 or newer, Bluetooth 4.0 |
| Dimensions | 160 x 110 x 50 mm |
| Weight | 500 g |
| Units | mbar, micron, mmHg, Torr, inHg, inH2O, hPa, Pa |
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
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.
Why buy from HVACShop?
- Australian support: Phone support is available Mon–Fri, 9:00am–5:00pm AEST on 0412 333 115.
- Email support: support@hvacshop.com.au
- Shipping carriers: Australia Post, TNT, Hunter Express and Toll Priority, depending on item and location.
- Returns & warranty: Faulty items are assessed through HVACShop’s returns process and the live product page currently states a 12-month manufacturer warranty.
- Secure payments: American Express, Apple Pay, Google Pay, Mastercard, PayPal, Shop Pay, Union Pay and Visa.
- Compliance note: In Australia, work on RAC equipment that carries the risk of refrigerant emission requires the appropriate ARCtick refrigerant handling licence.
- ABN: 98 351 143 900 – verify via ABN Lookup.
Author: HVACShop Content Team
Reviewer: Licensed refrigeration & air-conditioning technician (role-based reviewer)
Last updated: 2026-03-10 AEST
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