Tapeswitch Type B2, B3, & B4 Perimeter Guards are designed for safety and securty applications. They are used to protect hazardous areas such as automated work cells or to monitor access or traffic in secure locations. The difference between models is the beam spacing.

These photoelectric devices provide the same high level category 4 safety integrity as the B-Series light curtains. To simplify installation, the emitter and receiver pair make up a self-contained system which is capable of safety functions without additional equipment.