A cooling tower controller with conductivity meter and optionally temperature input and circulation pump controlling

AS3037IT cooling tower controller with conductivity meter. Extendable with temperature input, two programmable outputs and circulation pump controlling


The AS3037IT(wallmounted) cooling tower controller with conductivity meter is designed for fully automatic monitoring and controlling of cooling tower systems. By means of an optional plug-in card IT3037, the control options can be further extended with one temperature input and two programmable outputs. Via plug-in card IT3037 an circulation pump can be controlled. The pump will be activated when the flush valve is opened or when the shot dosing is activated.


  • User operated programming using double row of illuminated LCD display
  • Display text in English, French, German or Dutch
  • Simple control utilizing easy to follow symbols
  • Built-in audio signal for 9 programmable signal indicators
  • Adaption to user specific requirements by means of options programmable on site
  • Simple operation by means of a few clear operating symbols
  • Locking of programming possible by use of a code number
  • Flushing depending on water meter, conductivity and both water meter and conductivity
  • Input of service telephone number
  • Extensive status report facility using information button
  • 2 inputs (fixed function) : water meter and dosing tank 1 empty
  • 2 programmable inputs : block flushing, dosing tank 2 empty, stop
  • 1 optional programmable input (IF circuit board) : level switch in tank, stop
  • Inputs programmable active open or closed
  • 1 connection for conductivity sensor (cell constant programmable from 0,01 to 10,00 cm-1)
  • Manual or automatic temperature compensation
  • 2 relay outputs with fixed function : flush valve (powered), dosing output (dry contact)
  • 1 programmable relay output (dry contact): shot dosing, alarm
  • 2 optional programmable relay outputs (dry contact): flush valve, shot dosing, alarm, flow pulse, circulation pump. (IF circuit board)
  • Output relay programmable active under current or not under current
  • 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) : 24/24VAC, 115/115VAC, 230/230VAC, 115/24VAC, 230/24VAC
Manuals United Kingdom France Germany The Netherlands
Product briefUnited Kingdom   
Application notesUnited KingdomGermanyThe Netherlands 
Exchanging EPROM 
EMC problems 


Embedded software

Hex file(s) for updating the controller



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