The testo 915i automatically connects via Bluetooth to a smartphone, tablet, or compatible Testo measuring device. The testo Smart App allows for intuitive operation, a clear display of measurement data, as well as documentation and report sending directly on-site. The handle is compatible with all standard market thermocouple sensors of type K, making it versatile for use.

The Smart Probe is suitable for wireless temperature measurement in a wide range of applications due to a large selection of sensors and compatibility with standard market thermocouple sensors of type K. The flexible and responsive temperature sensor (TE type K, class 1) features a glass-fiber insulated cable (length 800 mm) and a secure fixation through an innovative locking mechanism in the handle. The measurement range extends from -50 to +400 °C.

Operation, evaluation, and documentation are straightforward with the free testo Smart App, which enables automatic Bluetooth connection to smartphones, tablets, or Testo measuring devices (e.g., testo 400, testo 550s) with a range of up to 100 m. High measurement accuracy is ensured by factory system calibration.