Enclosure cover with the CT type Fresnel lens (vertical curtain) for APD-200, APMD-250, SLIM-PIR-LUNA, SLIM-PIR-PRO, SLIM-DUAL-LUNA, SLIM-DUAL-PRO detectors. CT-CL is a complete enclosure cover for the APD-200, APMD-250, SLIM-PIR-LUNA, SLIM-PIR-PRO, SLIM-DUAL-LUNA and SLIM-DUAL-PRO motion detectors. The Fresnel lens used in CT-CL changes their character so that they can work as curtain detectors. Replacement of the standard cover on CT-CL is very easy and fast. The entire element is replaced without having to dismantle individual parts. Complete enclosure cover for the motion detectors: APD-200, APMD-250, SLIM-PIR-LUNA, SLIM-PIR-PRO, SLIM-DUAL-LUNA and SLIM-DUAL-PRO Vertical curtain type lens