Fargo Controls, Inc. Rectangular DC 3 Wire Inductive Proximity Sensor S3781

The S3781 is an NPN, normally closed, rectangular DC 3-wire inductive proximity sensor with a 2 mm operating distance, designed for detection in industrial environments. It operates on a 6 to 30 Vdc power supply with a maximum switching current of 200 mA and a voltage drop under 1.8 V when ON. The sensor includes short circuit and reverse polarity protection, an LED function indicator, and is rated IP67 for dust tightness and immersion resistance. The case is made of anodized aluminum with flush mounting capability, and it has a 2-meter PVC cable output. Operating temperature ranges from -25 to +70 °C, with a high-temperature +100 °C version available upon request. The operating frequency is 1 kHz, repeatability is within ±3% of Sn, and hysteresis is less than 10% of Sn.