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Wall mounted or panel mounted ro controller with conductivity, temperature and recorder outputs, universal applicable for automatic monitoring and control of reverse osmosis plants.

os3050/3051 wall -or panel-mounted ro controller which is universal applicable for automatic monitoring and control of reverse osmosis plants


The OS3050/3051 ro controlleris universal applicable for automatic monitoring and control of reverse osmosis plants. The controller is equipped with a conductivity meter optional is a second conductivity meter and temperature meter. Also optional is a circuit board with two recorder outputs (0(4) – 20 mA). There are five possible stages : "Stand by", "Production", "Rinse after production", "Rinse during standby" and "Maintenance". 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.


  • Menu driven programming utilizing "two line" LCD-display.
  • Choice of languages (English, French, German, Italian, Spanish or Dutch).
  • Adaptable to user specific requirements by built-in programmable options.
  • Simple control utilizing easy to follow symbols.
  • Universally applicable for various sizes of installation.
  • Desalinated water production controllable by hand or level switches.
  • Control of the maintenance situation by means of a code choice possible.
  • Programming a service telephone number possible.
  • Substantial status information employing INFO key: actual input and output conditions, service telephone number, software version, programming situation of the annunciation and malfunction relays, rinse interval, rinse times, instrument probe cell constants.
  • Large green LED-display showing permeate- and raw water conductivity plus the relative.
  • Permeate-conductivity as a percentage value of the raw water conductivity or raw water temperature.
  • Optional card for 2 recorder outputs 0(4)-20mA (conductivity / temperature).
  • Input: production-stop, storage tank full/empty, excess pressure, low pressure, concentrate-monitoring or alarm reset, motor protection switch, temperature feeler (optional).
  • Integrated conductivity meter with automatic range switching.
  • Conductivity range according to the instrument probe cell constants from 0,1 to 1 00 000 µS/cm.
  • The instrument probe cell constants programmable from 0,01 to 10,00 cm-1.
  • Manual or automatic temperature compensation.
  • Duplicate conductivity meter and temperature reading as an available option.
  • Thermo switch with annunciation contact for 115/230 Volt pressure pump as available option Output: pressure pump (protection), input valve, rinse valve for concentrate and permeate, annunciation and malfunction contact.
  • Security of program information against supply failure, as all program information is stored without accu.
  • Large capacity microprocessor with "Watchdog", illegal “Operation code” and frequency monitoring.
  • Manufactured in accordance with EMC codes of practice; by means of galvanic isolation between the micro-processor and the in- and output circuits, plus extra built-in filter.
  • Available for wall-mounting and panel-mounting.
  • vailable (input /output) : 24/24V, 115/115V, 230/230V.
Manuals United Kingdom France Germany The Netherlands Italy Spain Russian Federation Poland
Product briefUnited Kingdom       
Application notesUnited KingdomGermanyThe Netherlands 
Exchanging EPROM OS3051 
Exchanging EPROM OS3050 
Installing recorder board IF3050 to OS3050 
 United KingdomGermanyThe Netherlands 
Installing conductivity measure board LM3050 to OS3050 
EMC problems 


Embedded software

Hex file(s) for updating the controller



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