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Smart Clamp Thermometer - Testo 115i


Professional measuring technology is now mobile:

when it comes to temperature measurements at widely spaced measuring points in particular, the testo 115i makes things much easier – thanks to a wireless connection to the smartphone or tablet. When used in conjunction with the testo 549i pressure measuring instrument, individual refrigeration system parameters can also be calculated.   

Measuring using the App offers lots of advantages Measurement data is transmitted wirelessly from the clamp thermometer to the testo Smart Probes App and can be viewed conveniently on your smartphone or tablet – either as a chart or in table form. Temperature changes are therefore immediately evident. The measurement data log can be emailed directly as a PDF or Excel file. This saves you time, allowing you to further increase your efficiency.


System requirements:  

iOS 8.3 or later Android 4.3 or later Bluetooth 4.0 

Product Benefits:

  • Compact professional measuring instrument from the Testo Smart Probes series, for use with smartphones/tablets

  • Measurement of flow and return temperature in heating systems

  • Temperature measurement on refrigeration systems for automatic calculation of superheating and subcooling

  • Fast identification of temperature changes by graph curve display

  • Measurement data analyzed and sent via testo Smart Probes App

  • Space-saving and easy to transport

  • Made in Germany

  • Two Years Warranty

Delivery Scope:

Testo 115i clamp thermometer with smartphone operation, including batteries and calibration protocol.

Technical Details:

Temperature - NTC

Measuring range

-40 to +150 °C


±1.3 °C (-20 to +85 °C)


0.1 °C

General technical data


127.4 g


183 x 90 x 30 mm

Operating temperature

-20 to +50 °C

Product-/housing material


System requirements

requires iOS 8.3 or newer; requires Android 4.3 or newer;

requires mobile end device with Bluetooth 4.0

Product colour


Battery type

3 AAA micro batteries

Battery life

150 h

Storage temperature

-20 to +60 °C