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Cooling Towers

A cooling tower utilizes the evaporation of the cooling liquid to dissipate heat. Generally, a cooling tower has nozzles that let the cooling liquid fall into open air. The liquid is released at the top of the tower and cascades down across a series of ventilated shelves. A fan at the top of the tower draws fresh air through the ventilated shelves and across the falling water. The air cools the liquid, which is then collected, filtered, and returned to the delivery system to gather more heat.

 

Monitoring Solutions

440 Internal Sensor
Provides local contacts as well as a 4-20mA output for interface with a PLC / DCS or other process monitor. Precaution: Placing the switch inside the cooling tower can cause the seal to fail if the moisture inside the tower contains corrosive substances.

 

  440 External Sensor
Provides local contacts as well as 4-20mA output for interface with a PLC / DCS or other process monitor. Electronics and setpoint controls located outside of wet area.

 

 

 

 

 

5535/45
Provides 4-20mA output interface with a PLC / DCS or other process monitor. Available local LCD display. Filters and galvanic isolation available. BNC output for dynamic signal analysis.

 

  ST5484E
4-20mA output for interface with a PLC / DCS or other process monitor. High-pass and low-pass filters available. Simple 2 wire installation.