The Dual Technology RCR-REX (Range Controlled Radar Request-to-Exit) sensor from GE Consumer & Industrial combines Doppler range controlled radar motion sensing and Fresnel lens PIR technology in one unit. Both physical motion and heat are simultaneously required to trigger the device. The sensor eliminates the effectiveness of tricks criminals use to gain access, such as pouring warm water under a door or sliding coat hangars with material attached under or between doors. Security personnel can adjust the range-controlled radar so the threshold is above the floor. The unit contains a built-in sounder that results in a loud warning if the door is not sealed. GE Consumer & Industrial

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