Flow switch for liquid flow and temperature monitoring

Fluxicont FS4SK

Flow switch for liquid flow and temperature monitoring in liquids, with 3…300 cm/s range, –20…+110 °C process temperature, 40 bar pressure rating, LED display and PNP, relay or 4…20 mA outputs.

Introduction

Liquid circuits need dependable monitoring before a dry-running pump, blocked filter or cooling failure becomes a process risk. This flow switch monitors flow velocity and temperature in liquids, making it suitable for cooling water circuits, pump function monitoring, leakage detection, lubrication circuits and filter monitoring in beverage industry applications.
 
The calorimetric sensor covers flow velocities from 3…300 cm/s and process temperatures from –20…+110 °C. It handles process pressures up to 40 bar and uses stainless steel wetted parts, with ingress protection (IP65/IP67) for demanding industrial environments.
 
On site, the device supports clear operation without extra tools. A bright LED display, function LEDs and a 3-button keypad with tactile feedback simplify setup, while the rotatable housing and display help maintain readability in different installation positions. Depending on the electronics version, outputs include 2x PNP, 1x PNP with 4…20 mA, or relay switching.

Wide liquid coverage
Wide liquid coverage
Measures flow velocities from 3…300 cm/s for general liquid monitoring tasks.
Handles harsh process use
Handles harsh process use
Withstands up to 40 bar and –20…+110 °C process temperature.
Easy local operation
Easy local operation
Bright LED display and 3-button keypad support setup directly at the measuring point.
Flexible output choice
Flexible output choice
Select PNP, relay or 4…20 mA versions to fit common industrial controls.

Features

Calorimetric measuring principle

The sensor uses calorimetric measurement for wear-free monitoring of liquid flow and temperature.

Process connection options

Versions are available with ISO 228-1 G½" or G¼" threads, with ANSI NPT and M18x1.5 adapter connections on request.

Wetted materials

The process connection is made from 1.4404/316L stainless steel, with a 1.4571/316Ti stainless steel sensor.

Seal materials

Wetted seals are available in FPM fluoroelastomer or EPDM, with EPDM listed as FDA-listed in the source.

M12 electrical connection

The device uses an M12 connector with wiring versions for PNP switching, current output, relay output or Desina-compliant connection.

Configurable variants

The order structure includes sensor lengths, electronics versions, seal materials and process connection choices for application-specific selection.