... Distance of 50 to 70mm, Suitable for Roller Doors Magnetic door sensor with Operating Distance of 60 to ... 38 x 10 and 106 x 16 x 16mmPacking: 1 piece/PEMagnetic contacts, magnetic alarm contacts, security magnetic ... for anti intrusion, magnetic switches for intruder alarm systems, magnetic sensors for home security systems, magnetic detector for security alarm systems Surface magnetic door sensor for ...