ultimate kit for all-round engineers in the field of heating, air conditioning, refrigeration and ventilation: the kit contains all the testo smart probes and is ideal for carrying out functional checks or for plant maintenance, in conjunction with your smartphone/tablet. the testo smart probes app enables you to work more easily and efficiently: automatically calculate numerous parameters such as superheating/subcooling, target superheat, cooling/heating power, differential temperature or mould indication. measurement data reports can be emailed directly as a pdf or excel file.