The AX-100/200TF Series of short range photoelectric detectors are compact in design with selectable beam frequencies. The selectable beam frequencies can be used to avoid unwanted crosstalk that can occur when using multiple photobeams over long distances or for beam stacking applications. Also the AX-100TF/200TF Series carries the IP65 high durable structure, which prevents water, dust or bugs from getting into the unit. The ideal optical pitch design reduces false alarms due to accidental beam interruption by falling leaves, birds, and so on. These features deliver performance with higher reliability in severe outdoor environmental condition.