Photo Beams for Gate Opener Price each. Two shown in Picture Photo Beams (R4222) price includes one pc. The GTO/ACCESS SYSTEMS, GTO/PRO Photo Beams are used as a primary safety device in providing a “non-contact” means of entrapment protection. Consult your GTO/ACCESS SYSTEMS, GTO/PRO distributor and refer to the installation manual of your GTO/ACCESS SYSTEMS, GTO/PRO gate opener system for further information regarding placement and requirements of safety devices.