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The S411 DIG probe is used for measuring conductive conductivity in pure and process waters.


  • Reliable conductivity measurement using graphite electrodes
  • Conductive measuring method with two electrodes and temperature compensation
  • PVC sensor body and graphite electrodes
  • No mechanically moving parts
  • Immediate installation and easy manteinance
  • MODBUS RTU serial communication protocol
  • Applications

  • Untreated water
  • Drinking water
  • Demineralization
  • Reverse osmosis
  • Ion exchanger
  • Water from conditioning systems and boilers
  • Artesian wells
  • S411 Technical specifications

    Measuring range 0…14 pH
    Measuring method conductive with two electrodes
    Resolution 0.01/ 0.1/ 1/ 10 (range 0...20/ 200/ 2000/ 20000) μS
    Accuracy ± 2.5 % of full scale
    Response time 90% of the value in less than 60 seconds
    Refresh time T90 < 60s
    Temp. compensation via internal NTC ( external NTC optional )
    Operating temperature 0…50 °C
    Maximum pressure 10 bar
    Body material PVC
    Electrode Graphite
    The probe is completely resinate inside
    Mechanical protection IP68 Sensor + cable
    Power supply 12…24Vdc
    Power consumption max. 2W
    Cable 10m integral (other on request) – 10m disconnectable cable
    Equipotential contact for solution included
    Signal interface RS 485 Modbus RTU Protocol
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