Type B2 Entrapment Protection refers to which device?

• A. Type A entrapment protection
• B. Type B2 contact sensor (edge device or equivalent)
• C. Type C force limiting device
• D. Type D continuous pressure device

Answer: (B)

Entrapment protection relies on devices that detect contact or obstruction at the moving edge and immediately stop or reverse the gate to prevent injury. A B2 device is specifically a contact sensor on the gate edge—an edge device or its equivalent—that is activated by physical contact. When pressed, it changes its electrical state and signals the control system to halt movement, thereby preventing entrapment. This edge-based contact approach is distinct from other types, such as force-limiting devices (which aim to limit the force applied) or continuous-pressure devices (which require constant pressure to operate), making the edge sensor the correct description for this protection type.