The SENTINEL TEMPERATURE is an advanced temperature sensor with integrated RF transceiver designed to be a fully supervised low-current device. The SENTINEL TEMPERATURE is a part of the FREEWAVE2 devices that uses an advanced 2way RF transceiver combined with an intelligent communication protocol. Temperature over the external sensor by using unique cord with NTC connected to the external input (e.g. measure freezer internal temperature). Temperature measurements are transmitted to the control panel. Each SENTINEL TEMPERATURE has a unique factory set ID code (24bit) which by registration is set into memory of the paired FREEWAVE2 TRANSCEIVER, enabling more secured communication and devices to be remotely controlled from a specific transceiver.