testo 549i - High-pressure gauge operated via smartphone

Order-Nr.  0560 2549 03

  • Measurement of high and low pressure

  • Low refrigerant loss – since no hoses are required for measurements

  • Live data feed integration now available with the MeasureQuick App

  • Problem-free application at measuring points that are a long distance apart thanks to Bluetooth® range up to 350 ft

The professional and compact testo 549i high-pressure gauge with 45 degree connector can be controlled via the testo Smart Probes App using your smartphone or tablet, and is ideal for carrying out servicing and troubleshooting on air conditioning and refrigeration systems. The App also enables evaporation and condensation temperatures to be calculated automatically.


Product Description

Testo offers you greater mobility when measuring: used in conjunction with your smartphone or tablet, the handy testo 549i high-pressure gauge is suitable for carrying out wireless servicing and troubleshooting on air conditioning and refrigeration systems, as well as for installing them. The measuring instrument can be quickly and easily attached directly to the pressure connection. The testo 549i makes it considerably easier to work on pressure connections that are a long distance apart, thanks to wireless connection to a smartphone or tablet.

Also practical: since no hoses are needed for the measurements, no refrigerant is lost, or only a very small quantity. When used in conjunction with the testo 115i clamp thermometer, individual refrigeration system parameters can also be calculated.

More measuring convenience thanks to the App

Readings can be viewed conveniently on your terminal device via the testo Smart Probes App. In addition, the App enables automatic calculation of evaporation and condensation temperatures. All measurement data are presented either as a diagram or a table. Finally, the measurement data report can be e-mailed directly as a pdf or Excel file.

Delivery Scope

1 x testo 549i high-pressure gauge operated via smartphone, including batteries and calibration protocol.

Related products

Technical Data

Pressure measurement

Measuring range

-15 to +870 psi / -1 to +60 bar


±0.5 % of full-scale value


0.01 psi / 0.01 bar

Probe connection

7 / 16 in. - UNF

Overload rel. (high pressure)

+943 psi / +65 bar

General technical data


5.52 oz. / 156.6 g


5 x 1 x 1 in. / 125 x 32 x 31 mm

Operating temperature

-4° to 122 °F / -20 to +50 °C



Product colour


Battery type

3 x AAA

Battery life

150 h

Pressure media


System requirements

requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0

requires iOS 11.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0

Storage temperature

-4° to 140 °F / -20 to +60 °C



$ 42.00
excl. tax
$ 71.00
excl. tax