Photoelectric Beam detector consists of alignment hole, beam strength LED indicators, spherical mirror.
Active Beams
Takex

EVE ER34615(D) 3.6V Lithium D Type Battery
Inovonics

Inovonics Wireless Repeater with Battery backup wireless iSeries
Optex

Optex 4 Channel Super AlignmentTwin Active Beam 200m
Optex

Optex 4 Channel Synchro Twin 30m Active Beam NO/NC Relay
Optex

Optex 4 Channel Synchro Twin 60m Active Beam No/NC Relay
Optex

Optex Basic Low Profile 30m Twin Active Beam Internal/External
Optex

Optex basic synchronised twin beam 40m
Optex

Optex Battery Powered 4 Channel Synchro Twin 30m Active Beam
Optex

Optex Battery Powered 4 Channel Synchro Twin 60m Active Beam
Optex

Optex external synchronised twin beam 20m
Optex

Optex Wireless 4 Channel Synchro Twin 30m Active Beam
Optex

Optex Wireless 4 Channel Synchro Twin 60m Active Beam