We are a leading company in the water treatment microprocessor manufacturing industry. Our products are devices specially designed for the water treatment industry. E.W.S. presents a new cooling tower water treatment controller: CTS8000 Water treatment products | E.W.S | water treatment controllers - accessoires - chemical testkits E.W.S. presents a new ultrafiltration water treatment controller: CTS8000


This is a cooling tower controller

AS3050/3051 a cooling tower controller


The unit type AS3050 or type AS3051 is universal applicable for automatic monitoring and control of cooling tower 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 six possible stages : "Service", "Flush", "Low level", "Flush blocked" and "Shot dosing". 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 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
  • 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
    • instrument probe cell constants
  • Large green LCD-display showing water conductivity
  • 7 Inputs : low level 1, tank full, tank empty, flush blocking 1, fluch blocking 2, low level 2, watermeter
  • 3 relay outputs (powered) : flush valve 1, flush valve 2, inlet valve
  • 3 relay outputs (dry contact) : dosing output 1, dosing output 2, alarm
  • 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
  • Second cooling tower plant possible when card with two conductivity meters is installed. Status of second cooling tower control only in LCD display (not with LEDs)
  • 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 (AS3050) and panel-mounting (AS3051)
  • Available (input /output) : 24/24V, 115/115V, 230/230V
Manuals United Kingdom France Germany The Netherlands Russian Federation
Product briefUnited Kingdom    
Application notesUnited KingdomGermanyThe Netherlands  
Exchanging EPROM AS3050  
Installing recorder board IF3050 to AS3050  
Installing conductivity measure board LA3050 to AS3050  
EMC problems  


Not applicable


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