Mirrors are allowed to be installed in projected beam detectors.

Mirrors are allowed to be installed in projected beam detectors.

• A. Not allowed under any condition
• B. True
• C. Only if the manufacturer approves
• D. False

Answer: (B)

Mirrored reflectors can be part of the beam path in a projected beam detector to extend coverage or route the beam around obstacles. These detectors transmit a light beam from a transmitter to a receiver across the protected area, and using a mirror allows the beam to travel longer distances or navigate corners while still being detected, as long as the installation follows the manufacturer’s guidelines. Proper alignment, a stable mount, and a clean optical surface are essential; if the mirror is misaligned or dirty, the beam may not reach the receiver and detection can fail or cause false alarms. Because mirrors used this way are a common and supported option when installed correctly, the statement is true. Always consult the specific product manual for any model-specific requirements, but broadly, mirrors are permitted in the beam path.

Mirrored reflectors can be part of the beam path in a projected beam detector to extend coverage or route the beam around obstacles. These detectors transmit a light beam from a transmitter to a receiver across the protected area, and using a mirror allows the beam to travel longer distances or navigate corners while still being detected, as long as the installation follows the manufacturer’s guidelines. Proper alignment, a stable mount, and a clean optical surface are essential; if the mirror is misaligned or dirty, the beam may not reach the receiver and detection can fail or cause false alarms. Because mirrors used this way are a common and supported option when installed correctly, the statement is true. Always consult the specific product manual for any model-specific requirements, but broadly, mirrors are permitted in the beam path.