testo 549 Low Cost Digital Refrigeration Gauge


Key Features:

60 refrigerant profiles stored in the instrument

Additional 12 month ( 3 year ) product  warranty with registration

Large 2-line backlit display

Digital accuracy performs more reliably than analog manifold gauge sets for more precise reading

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The Testo 549 digital refrigeration gauge is a breakthrough value, making analog gauges obsolete. It precisely measures high side / low side pressure and instantly displays the corresponding saturation / evaporation temperatures for 60 refrigerants. With optional temperature probes, automatic superheat and sub-cooling calculations can be displayed. 

The versatility of 60 on-board refrigerant profiles means the Testo 549 digital manifold is the only gauge that you need. The proven, rugged design will give you years of dependable service. With optional temperature probes the Testo 549 digital manifold provides accurate, real-time superheat and sub-cooling at the push of a button.

Why Make the Switch from Analogue to Digital Gauges

Measures high side/low side pressure and displays saturation / evaporation temperatures

2-way valve block with three connections and sight glass

60 refrigerant profiles stored in the instrument

Large 2-line backlit display

3 year warranty with registration

Provides real-time superheat and sub-cooling with optional temperature probes

What’s included: testo 549, digital manifold; including batteries, certificate of conformity, and user's manual.


Technical Data

Storage Temperature -20 to + 60°C
Operating temperature -10 to +50 °C
Battery type 4 AA batteries
Battery life 250 hours
Dimensions 265 x 48 x 19 mm


Instrument Sensor 

Measuring range -50 to +150 °C 
Accuracy ±0.5 °C 
Resolution 0.1 °C / °F / °R 


Low Pressure Probe Measurement 

Measuring range -1 to 60 bar
Accuracy ±0.5 % fs
Resolution 0.1 psi (0.01 bar)
Overload  65 psi




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