Refrigeration systems, air conditioning systems and heat pumps

To ensure that refrigeration, air-conditioning and heat pump systems function smoothly, cost-effectively and in an environmentally friendly manner, their functions must be checked regularly. The compact measuring instruments from the testo Smart Probes range make measuring temperature, pressure, humidity and flow more straightforward and mobile than ever before. The practical Smart Probes are always to hand for immediate use.

Best seller: testo 605i

How testo Smart Probes offer support for refrigeration systems, air conditioning systems and heat pumps

Leak test

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  • Long-term measurement of system pressure with the testo 549i high-pressure measuring instrument
  • Check for compressor leaks with the testo 549i high pressure measuring instrument.

And this is how the testo Smart App helps you in this application:

  • Recording and analysis of the pressure curve

Superheating and subcooling

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  • Simultaneous measurement of temperature and pressure on the high and low pressure side of the system with two testo 115i clamp thermometers and two testo 549i high-pressure measuring instruments
  • Straightforward measurement even at measuring points far away from each other (indoors and outdoors) thanks to a long range of up to 100 metres

And this is how the testo Smart App helps you in this application:

  • All relevant refrigerants stored
  • Automatic updates of new refrigerants
  • Automatic determination of condensation and evaporation temperature and calculation of superheating/subcooling

Target superheat

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  • Measurement of wet bulb temperature with the testo 605i thermohygrometer
  • Measurement of outside temperature with the testo 605i thermohygrometer
  • Simultaneous measurement of temperature and pressure on the high and low pressure side of the system with two testo 115i clamp thermometers and two testo 549i high-pressure measuring instruments

And this is how the testo Smart App helps you in this application:

  • All relevant refrigerants stored
  • Automatic updates of new refrigerants
  • Automatic calculation of the target superheat

Measuring vacuum

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  • Flexible positioning of the wireless testo 552i Smart Probe for more accurate measuring results
  • Hose-free application prevents leaks and refrigerant loss

We recommend these products

testo 115i – clamp thermometer operated by smartphone

testo 549i – High-pressure measuring instrument operated with your smartphone

testo 605i – Thermohygrometer operated with your smartphone

testo 552i – vacuum gauge operated by smartphone


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For accurate hose-free vacuum measurement on refrigeration systems, air conditioning systems or heat pumps

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