The TEK 880 ATEX / Intrinsically Safe Cellular Radar level sensor (UL 913 Class 1 Division 1 Zone 0 certified) uses radar technology to measure the fluid liquid level of the tank being monitored and then communicates this data in a binary message to a remote server via a TCP connection. This is communicated via CAT-M1 / NB-IoT networks. This device is specifically designed to be a low profile, non-invasive, continuous liquid level sensor.