This listing is for one replacement sensor compatible with model E3T-ST13. The unit is a through-beam photoelectric sensor with a PNP open-collector, light-ON output intended for photoelectric switch and object detection uses.

• PNP open-collector, light-ON output type suitable for photoelectric switch applications and standard PLC/discrete I/O interfaces.
• Approx. 1 m sensing range (typical for E3T-ST13 style through-beam sensors) – check your system datasheet for exact detection performance in your setup.
• Compact sensor body, approx. 0.28 x 0.37 x 0.57 inches (7 x 9.5 x 14.6 mm) – measure mounting location and clearance prior to fitting.