Testo 549i Smart High Pressure Gauge – 0560 2549 02

The Testo 549i is a compact Bluetooth pressure gauge that uses your smartphone or tablet as the display, making it a strong fit for low-refrigerant-loss pressure checks, servicing and troubleshooting on refrigeration and air-conditioning systems.

Browse our full refrigerant gauges range, compare with other Bluetooth smart tools, or explore the wider Testo collection.

Quick summary

The Testo 549i suits HVAC-R technicians who want a lightweight, hoseless pressure tool for quick service checks and app-based reporting, without carrying a full digital manifold on every job.

Best for

• Service and troubleshooting work on air-conditioning and refrigeration systems
• Technicians who want lower refrigerant loss than a hose-heavy workflow
• Compact kits where weight and speed matter
• Tradies already using the Testo Smart App ecosystem

Not ideal for

• Users who want a full manifold with built-in valves and hose management
• Technicians who need pipe-temperature readings without adding clamp thermometers
• Buyers who want a standalone meter with its own screen

Why tradies choose the Testo 549i

• Very low refrigerant loss: because measurements can be taken without traditional hose-heavy setups.
• Compact and lightweight: easy to carry in a service bag or add to a Smart Probes kit.
• App-based reporting: view readings as a graph or table and send results as PDF or spreadsheet-compatible reports from site.
• Works well on awkward systems: Bluetooth range helps when measurement points are far apart.
• Expandable workflow: pair it with the Testo 115i clamp thermometer when you want broader refrigeration system calculations in the app.

Key specs

Compatibility and setup notes

The 549i is strongest as a compact pressure-measurement tool, not as a full replacement for a manifold set on every job. It is a good fit for quick service checks, wireless diagnostics and reduced refrigerant loss. If you want a broader app-based refrigeration workflow, pair it with the Testo 115i clamp thermometer or step up to a full Smart Probes kit.

If you’re comparing tool styles, browse our refrigerant gauges, read our analog vs digital aircon gauges guide, or contact the team via our contact page.

What’s included

• 1 x Testo 549i smart high pressure gauge
• Batteries
• Calibration protocol

What you may also need

• Testo 115i clamp thermometer – to add pipe temperature measurement and broader refrigeration calculations in the app.
• Testo Smart Probes AC & Refrigeration Test Kit – if you want a more complete wireless refrigeration setup.
• Bluetooth smart tools – to build out a connected workflow across more measurements.
• Refrigerant gauges – if you also want manifold-style options for charging and broader service work.

Official references

• Official Testo 549i product page
• Official testo Smart App page
• ARCtick refrigerant handling licence information

Frequently asked questions

Is the Testo 549i a full digital manifold?

No. It is a compact smart pressure gauge, not a full valve manifold. It is best for lightweight wireless pressure work and quick diagnostics.

Does the Testo 549i reduce refrigerant loss?

Yes. One of its main advantages is hoseless measurement, which helps keep refrigerant loss very low compared with more traditional hose-based checks.

Can I use it on refrigeration and air-conditioning systems?

Yes. Testo positions it for servicing, troubleshooting and installation work on refrigeration and air-conditioning systems.

Do I need a smartphone to use it?

Yes. The 549i is designed to work with the testo Smart App on a compatible smartphone or tablet.

Can it calculate refrigeration system values on its own?

It can display pressure and automatically show evaporation and condensation temperatures in the app. For broader refrigeration system calculations, pair it with compatible temperature tools such as the Testo 115i.

What comes in the box?

You get the Testo 549i, batteries and a calibration protocol.