Pepperl+Fuchs 40FR1-3 Reed Switch Proximity Sensor, 19.8mm Sensing Range, IP68, PVDF Cable

The 40FR1-3 provides a simple dry contact output via its normally open (NO) reed switch. When a magnetic field of sufficient strength is present within its 19.8mm sensing range, the hermetically sealed contacts close, completing the circuit. This provides a direct, electrically isolated switching signal compatible with PLC inputs, relays, or other control devices.

The sensor is rated for both AC and DC operation. For AC, the maximum rating is 132 V AC, 750 mA, and 10 VA. For DC, the maximum rating is 100 V DC, 300 mA, and 10 W. The standard operating voltages are 115 V AC and 100 V DC. Always ensure your control circuit's voltage and current draw are within these specified limits.

Yes, the sensor's IP68 protection rating and polycarbonate housing make it suitable for harsh environments. It is completely protected against dust ingress and can withstand continuous immersion in water under specified conditions. The integrated PVDF cable is also chemically resistant, supporting use in washdown areas, outdoors, or in industrial settings with exposure to moisture and contaminants.

Activation requires a magnetic field with sufficient flux density at the rated operating distance of 19.8mm. The sensor features a hysteresis of ≥2.54mm, meaning the magnet must be brought closer than 19.8mm to actuate and can be moved further away (by at least 2.54mm) before deactivating. This prevents chatter and ensures stable switching. Consult the datasheet for specific magnet requirements.