ids 6 beam ir barrier beam set 60m ir beamer 4 beams 5m fence barrier beam detector infrared beam sensor beam detector infrared beam sensor solar wireless infrared beam sensor outdoor alarm monitoring system solar beam sensor best for outdoor beam break alert 4g app monitor alarm outdoor alarm monitoring system solar beam sensor best for outdoor photocell beam sensor simple single solar beam sensor best for outdoor ir beamer 4 beams 5m fence barrier solar beam sensor best for outdoor photocell beam sensor simple single photocell beam sensor simple single dual beam sensor 100 m bg100 essl boom barrier photocell beam sensor simple single security alarm system ir break beam sensor solar powered ir break beam sensor solar powered ir break beam sensor solar powered ir break beam sensor solar powered bg100 essl boom barrier ir break beam sensor solar powered essl bg100 boom barrier ir break beam sensor solar powered ir break beam sensor solar powered safety red essl bgl 100 boom barrier ir break beam sensor solar powered security alarm system sicherheitsmesser secunorm 300 l 140mm