Ro controller with conductivity meter applicable for automatic monitoring and control of reverse osmosis plants.

OS3020 a reverse osmosis controller with conductivity meter for simple reverse osmsosis plants


The OS3020 ro controller is used to fully automatically monitor and control very simple water treatment systems, which operate according to the reverse osmosis principle. The controller is equipped with a conductivity meter without temperature meter. There are four possible stages : "Stand by", "Production", "Rinse after production" and "Rinse during standby". This unit can monitor conductivity and several inputs e.g. level switches, low pressure switch, exceeded pressure and stop. Adaptable to user specific requirements by built-in programmable options. The programmed configuration will be stored into non volatile memory and therefore not be affected by power loss.


  • User operated programming using double row of illuminated LCD display
  • Display text in English, French, German, Italian, Spanish, Swedish, Czech, Russian or Dutch
  • Adaption to user specific requirements by means of options programmable on site
  • 4 programmable stages (Production, Stand-by, Rinse after production, Interval rinse during Standby)
  • Extensive status report facility using information button
  • 2 inputs : low water pressure and tank full
  • 1 programmable input for : stop, excess pressure or tank empty
  • 1 Conductivity meter input with range from 0,5 – 100.000µS/cm, cell constants from 0,01 – 10,00cm-1, manual temperature compensation and automatic range switching
  • 2 powered relay outputs: Inlet valve (fused 8A), High pressure pump (fused 8A)
  • 1 relay output (dry contact) : programmable for Alarm or Concentrate valve
  • Secure from power failure as all data is stored long-term without battery
  • Efficient micro controller with watchdog, illegal operation code and cycle monitoring
  • Safeguarded from EMC by galvanic separation between microcontroller and in- and output circuits and also by additional interference suppression filter
  • Available for wall-mounting
  • Available (input /output) : 12VDC/12VDC, 24VDC/24VDC, 24VAC/24VAC, 115VAC/115VAC, 230VAC/230VAC
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