The AP 15 is a photoelectric amplifier manufactured by Telco Sensors. It is suitable for use in conjunction with a set of remote transmitter LT, and receiver LR from the 100, 110, and 120 series.
The unit is equipped with an integral potentiometer positioned on the front panel, allowing manual sensitivity adjustment. It allows the selection of output from either a relay or transistor output, with or without an adjustable on/off time delay of 0 s to 10 s.
The amplifier is supplied with a switch to enable selection from light or dark function, and long or short range.