Matelex has entrusted the performance measurement of the DNI as a leak detector to an independent verification office of high standing in the refrigeration sector.


CemafroidThis report is dated August 2011

In August 2011, the version of the programme and the algorithms was 5.0. Subsequently, the algorithms have evolved and the detection offers even better performance. At the end of 2015, the version of the program was 9.2.

All of the DNI connected to Sentinelle benefit from free programme upgrades during the first two years. For the following years a subscription is necessary.


The objective was to determine the capacity of the device to detect a fluid leak in a refrigeration system.

Calibrated velocity of the leak (kg/day) 3.00 1.00 0.5 0.2
Tank diameter (cm) 44 44 44 444
Time delay of the DNI in the detection of the leak hours:minutes 20:59 61:29 111:44 86:59 *
Mass of fluid lost before detection (kg) 2.63 2.57 2.33 0.73