Testo 549 Digital Refrigeration Manifold – 0560 0550

The Testo 549 is an entry-level digital refrigeration manifold built for commissioning, service and maintenance on refrigeration systems and heat pumps. It gives you fast high-side and low-side pressure readings, automatic evaporating and condensing temperature display, and optional real-time superheat/subcooling when paired with external temperature probes.

Browse our full refrigerant gauges range, compare other tools in the Testo collection, or contact the team via our contact page if you want help choosing between an entry-level digital manifold and a higher-spec model.

Quick summary

The Testo 549 suits HVAC-R technicians who want to move on from analogue manifolds to a tougher, easier-to-read digital manifold for everyday refrigeration and heat pump work.

Best for

• Refrigeration and air conditioning service work
• Heat pump commissioning and maintenance
• Tradies replacing older analogue gauge sets
• Users who want digital pressure readings without stepping into a premium smart manifold yet

Not ideal for

• Technicians who want built-in vacuum measurement
• Users who want app-based reporting and wireless workflows
• Anyone expecting included clamp probes in the standard box

Why tradies choose the Testo 549

• Clear digital workflow: automatic display of evaporating and condensing temperatures reduces guesswork compared with analogue gauges.
• Optional real-time superheat and subcooling: add external temperature probes for faster checks without manual comparison charts.
• Heat pump friendly: automatic heat pump mode helps simplify hose work on reversible systems.
• Useful leak test function: temperature-compensated tightness testing supports rough system checks.
• Built for field use: robust 2-way metal valve block, 3 hose parkers, suspension hook and backlit display suit everyday service work.
• Broad refrigerant coverage: 60 refrigerants are stored in the instrument.

Key specs

Compatibility and setup notes

The Testo 549 is strongest as an everyday digital manifold for refrigeration systems and heat pumps. It gives you pressure readings, condensing/evaporating temperatures, and optional superheat/subcooling when you add the right temperature probes. If you regularly evacuate and charge by weight, you will still want to pair it with a suitable vacuum pump and refrigerant scale.

For hose and charging setup options, browse our refrigerant hoses, vacuum pumps and refrigerant scales. Want help deciding between digital and analogue? Read our analog vs digital aircon gauges guide.

What's included

• Testo 549 digital manifold
• Batteries
• Calibration certificate
• User manual

What you may also need

• Refrigerant hoses – for charging, pressure testing and everyday service connections.
• Vacuum pumps – to build out a proper evacuation setup alongside the manifold.
• Refrigerant scales – for accurate charging and recovery by weight.
• HVACShop support – useful if you need the right optional temperature probe setup for superheat and subcooling.

References & Resources

• Official Testo 549 datasheet (PDF)
• ARCtick refrigerant handling licence information

Frequently asked questions

Is the Testo 549 suitable for heat pumps?

Yes. Testo positions the 549 for refrigeration systems and heat pumps, and it includes an automatic heat pump mode.

Can the Testo 549 calculate superheat and subcooling?

Yes, but you need compatible external temperature probes. With those fitted, the manifold can calculate superheat and subcooling in real time.

Does it include temperature probes in the box?

No. The standard package includes the manifold, batteries, calibration certificate and manual. Temperature probes are optional accessories.

How many refrigerants are stored in the instrument?

The Testo 549 stores 60 refrigerants in the instrument.

Does this replace a vacuum gauge and refrigerant scale?

Not fully. It is a strong digital manifold, but you will still want a proper vacuum setup and a charging scale for complete evacuation and charging workflows.

Can it be used with A2L refrigerants?

Testo states it can be used for applications with A2L refrigerant, taking into account the relevant legislation, norms and guidelines for refrigeration systems.