Fluxicont® FS4

Delivery Time: not specified

Flow switch for general applications Monitoring of flow and temperature in liquids

  • Short response time
  • Wareless
  • Display and operating on site improofes operator comfort


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The Fluxicont FS4 is an electronic flow resp. temperature switch for monitoring, control as well as continuous measurement of flow and temperatures in liquids.

Due to the device construction with flow velocities from 3cm/s to 300cm/s , process temperatures from –20°C to +110°C, process pressures up to 40bar, process material stainless steel V4A as well as the availability of industrial standard process connections like thread ISO 228-1 thread ANSI NPT – on request and thread ISO 225-1 M18x1,5 for adapter – on request the device is especially suitable for the use for monitoring cooling water circulation systems of pumps, turbines, compressors and heat exchangers, for monitoring pump functionality, for dry run protection for pumps, for leak monitoring in process lines, monitoring lubrication systems and filter monitoring in the beverage industry.

The flow switch is suitable for demanding measuring requirements.

Due to its high accuracy and the high flexibility of configuration, the Fluxicont FS4 can be suited a wide variety of applications.

The robust design and the high-quality workmanship turns the device into a very high quality product, which even the most adverse environmental conditions cannot affect, whether the lowest temperatures when used outdoors, extreme shock and vibration or aggressive media.

A captive laser marking of the type label ensures the identifiability throughout the entire lifetime of the device.

Obviously is the optional marking of a measurement point designation resp. TAG, a customer label or of a neutral type label, of course also per laser marking.

A LABS-free resp. silicone-free version, a factory calibration with calibration certificate and a customer specific configuration resp. preset is also optionally available like a material test certificate EN10204 3.1 or factory certifications for drink water resp. food suitability.

Customer specific special versions can be realized on request, e.g. software adaption (menu navigation, special functions, etc.), changed terminal assignment resp. connector orientation, design adaption of the user surface and special designs for the process connection.

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Step response time Flow: ≤ 6s (td = 0s / 0% >> 90% / 100% >> 10%)
Temperature: ≤ 4s
Start-up time tOn Flow: ≤ 10s
Temperature: ≤ 2s
Direct voltage
Electronic output type A / B / C / D
Supply voltage US 10,5V…35 V DC
Reverse polarity protected
Residual ripple UPP ≤ 2VPP
USmin ≤ US ≤ USmax
Supply current IIn ≤ 100mA
S1 / S2 = 0mA
Iout = 22mA
Isolation voltage 500VAC (electrical connections – enclosure)
Universal voltage
Electronic output type W
Supply voltage US 20V…253 V AC – 48/62Hz
20V…220 V DC
Supply power PIn ≤ 4VA
Protection classification I (EN 61140)
Overvoltage category II (EN 60664-1)
Measurement parameter Flow velocity
Measurement principle calorimetric
Measurement medium Liquids
Measurement range 3…300 cm/s
Greatest sensivity: 3…100 cm/s
Factory setting: 0…100 cm/s
Temperature gradient ≥ 300 K/min
Switch output PNP S1 / S2
Electronic output type A / B / C / D
Function PNP switch to +L
Output voltage UOut UOut ≥ US – 2V
Output current IL 0mA…200mA
current limited, short circuit protected
Rise time T90 < 30µs (RL < 3kR / IOut > 4,5mA)
Switch cycles ≥ 100.000.000
Switch output relay S1
Electronic output type W
Function Relay changeover contact – switch to L/+L
Switching values ≤ 2A
≤ 62,5VA
Switch cycles ≥ 100.000
Analogue output Aout – Current 4…20mA
Electronic output type B / C / D
Operating range IOut 3,8mA…20,5mA
min. 3,6mA
max. 22mA
Permitted load RL ≤ (US – 10,5V) / 20mA
Measuring accuracyv
Accuracy Flow ≤ ±5% MEV14: 5…100 cm/s, -20°C…+85°C
≤ ±10% MEV14: 100…175 cm/s, -20°C…+85°C
Accuracy Temperature ≤ ±1,5K (≥ 20cm/s)
Long term drift Flow: ≤ ±10% MV13/year, -20°C…+85°C
Temperature deviation Flow: ≤ ±0,4cm/s /K, -20°C…+85°C
(process wetted)
Steel 1.4404 (316L)
Process connection
(process wetted)
Steel 1.4571 (316Ti)
Gaskets FPM – fluorelastomere (e.g. Viton®)
Environmental conditions
Environmental temperature -20°C…+85°C
Process temperature -30°C…120°C
Process pressure ≤ +40bar
Protection classification IP65/IP67 (EN/IEC 60529)

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