F31/F31K Series Inductive Sensors: The Standard Solution for Your Valves

Universal platform for direct mounting on actuators of any size

The F31/F31K series from Pepperl+Fuchs is the industry standard in the segment of dual inductive sensors for monitoring the end positions of on/off and regulating valves. These sensors are ideally suited for standard industrial applications where high reliability, connection flexibility, and resistance to external influences are required.

Key Benefits and Features

• Direct Mounting: Designed for fast and direct mounting on standard pneumatic or manual actuators, regardless of size and manufacturer, in accordance with the VDI/VDE 3845 standard.

• Valve Integration (F31K Series): F31K versions are equipped with an integrated terminal compartment (with screw or spring-cage terminals) and can feature one or two outputs for connecting solenoid valves. This allows direct valve control via the sensor connection, significantly reducing installation effort and cabling costs.

• Interface Versatility: The series offers a wide range of electronic interfaces, including:

  • DC 2-wire and 3-wire

  • NAMUR (for hazardous areas, Ex i)

  • Versions with functional safety SIL 2 (in accordance with IEC 61508)

  • AS-Interface

• Reliability: The robust PBT plastic housing provides an IP67/IP66 degree of protection and reliable operation at temperatures from –25 °C to +70 °C, making them suitable for both indoor and outdoor use.

• Status Visualization: Integrated LEDs clearly indicate the sensor switching status and the operation of the solenoid valve.

F31/F31K Applications

The F31/F31K series is the optimal choice for all standard valve position control applications in water treatment facilities, chemical and oil/gas industries (including hazardous areas), as well as in general industrial automation.

Official Partner in Ukraine — CSC-Automation LLC

CSC-Automation LLC is the official distributor of Pepperl+Fuchs. We will help you select the necessary configuration of F31/F31K series sensors, including versions for hazardous areas and applications requiring SIL 2 functional safety.