SDC SECURITY DOOR CONTROLS 474U Touchless Exit Switch

Touchless Exit Switch for Hands-Free Access

The SDC Security Door Controls 474U is a wall-mounted switch that opens doors without physical contact. It suits facilities where hygiene or hands-free operation is a priority, such as healthcare, laboratories or clean-room environments. The unit mounts on a standard wall box and connects to an access-control system or electric lock.

Limits of Infrared Detection Range

The switch relies on infrared sensing, so detection distance and angle are fixed by the sensor optics and cannot be adjusted on site. Performance drops if the lens is obscured by dirt, paint or heavy condensation. Installers must verify that the mounting height and ambient light conditions match the sensor’s fixed field of view. Buyers needing adjustable range or programmable timing should select a different device.