The PRO 915 is a professional high-end differential pressure and temperature handheld data logger with a variety of functions, high robustness and user comfort for a safe and reliable use.Pressure measurementThe measuring device has an internal digital differential pressure sensor. The following measuring ranges are available depending on the model:- PER 915-1: ±20 hPa- PER 915-2: ±200 hPaThe measuring device is equipped with a "Peak" function to detect sudden pressure fluctuations. Zero and slope corrections by the user make it possible to compensate for any sensor drift over time to achieve the best measurement accuracy.The data logger is supplied with universal pressure connectors with barbed hooks for connecting hoses with an inner diameter of 4 and 6 mm.The pressure connectors are screwed to the meter with a standard thread G 1/8, so that the user can replace them with another type of connection if necessary, in order to adapt them to his specific needs.Air velocity and flow measu