FLOW SWITCH 10/11/15/20

FLOW SWITCH 10/11/15/20

(Made in four versions depending on flow velocity)

  • FS 11 – 2× status output (depending on flow velocity)
  • FS 15 – 2× status output (1× depending on flow velocity and 1× on temperature)
  • FS 20 – 1× status output and 1× current output (depending on flow velocity)

If the flow rate drops below the user specified limit, the status output will be changed. The flow rate is indicated by ten LEDs within the measurement range and you can select the boundary for making/breaking the contact in the same graduation. The measuring cycle takes from 4sec to 8sec with recommended measurement range 4 ÷ 150 cm/sec.

If the piping is empty, the sensor behaves identically as in the case of zero flow rate.


The flow switch contains two flush-buttons by which means it is possible to set

  • Switching point/points for flow velocity (or temperature in some case)
  • To change the logics of the making/breaking output
  • To calibrate minimum and maximum flow rate for the sensor
  • To reset default parameters from the manufacturer


If the flow rate of medium is to be monitored in a pipe smaller than DN25 (or the flow velocity is below the sensor range for the given pipe diameter), it is advantageous to use an adapter block with the corresponding flow velocity and thereby ensure proper functioning and maintain the installation conditions. The adapters are designed for the short version of 65mm sensor with the use of direct neck with G½“ pipe thread.

  Individual designs

  • FS adapter block DN20/G¾“ for 1 ÷ 10 l/min. (size 150×50×40 mm)
  • FS adapter block DN15/G½“ for 0.5 ÷ 5 l/min. (size 150×50×30 mm)
  • FS adapter block DN10/G¼“ for 0.2 ÷ 2 l/min. (size 150×50×30 mm)
  • FS adapter block DN4,7/G¼“ for 50 ÷ 500 ml/min. (size 70×50×30 mm)
  • FS adapter block DN2,7/G¼“ for 2 ÷ 100 ml/min. (size 70×50×30 mm)

Flow switch 10/11/15/20 main advantages

  • Possibility to use another status output (version FS 15) to monitor temperature according to setting
  • For FS 20 design, in addition to the making contact also 4 ÷ 20 mA current output
  • 10 LEDs to display the current flow and adjusted switching limits
  • „Self-teaching“ system with the possibility of Qmin and Qmax settings
  • Possibility to set switching limits (pre-set neutral zone)
  • Electrical connection through M12 (4-pin) connector
  • Continuous control of the sensor for correct operation
  • Full corrosion-proof construction
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