Fargo Controls, Inc. 18 mm Metal Housing Photelectric Sensor, DC S4451

The S4451 is an 18 mm metal housing photoelectric sensor with a connector interface, designed for direct reflection detection. It operates on a 10-30 Vdc power supply with a maximum power drain of 50 mA, a voltage drop of ≤1.8 V in the on state, and a switching current limit of 200 mA. The sensor features programmable NPN/PNP output, sensitivity adjustment via a trimmer, LED indicators, and built-in short circuit and reverse polarity protection. It has a sensing distance of up to 20 cm when detecting matte white paper (10 x 10 cm), an operating frequency of up to 400 Hz, and light immunity exceeding 10,000 Lux. The unit is rated IP67 for dust and immersion protection, with an operating temperature range of -20 to +50 °C and a nickel-plated brass housing.