Bb sensors radar sensors rsm series bb sensors rsm 1650 this 5v universal radar sensor module with innovative technology from bb sensors is ideal for use with motion detectors it features an optimised phemt oscillator with small power input and very compact dimensions plus separate transmission and receiving antenna for maximum sensitivity can be used in level spacer and speed measurement alarm and safety applications bb sensors rsm 1650 24 24250ghz mono radar sensor module 5v