SICK ET3-P5728 Photoelectric Sensor

The ET3-P5728 is a compact ELF3 diffuse photoelectric sensor from SICK, designed for direct-detection of small parts in automation lines. It operates on 10–30 V DC with a typical current draw of 20 mA and provides a PNP switching output. The device offers a sensing range from 5 mm to 155 mm using an infrared LED at 880 nm, with a light spot roughly 31 mm by 31 mm at a 150 mm distance, and is intended for diffuse-reflection targets with about 90% remission on standard white (DIN 5033). The sensor measures 23.8 x 43.4 x 33.6 mm and uses an M18-sized housing with focused optics and no user adjustment required. It belongs to the ELF3 family and is associated with part number 1047939. Operational temperature range is -25°C to +50°C, making it suitable for typical machine environments. Common applications include presence detection on conveyors, feeder stations, and pick-and-place setups where a compact, straightforward sensing solution is required.