Level Transmitter Improves Chiller System

New Taipei, Taiwan – Finetek Co., Ltd. is pleased to announce the availability and use of its newest EG series level transmitter, the EG3, to precisely measure coolant level in an evaporator within an industrial air or water cooled chiller.  Accurate reservoir level control is important for precise control of refrigerant flow through the expansion valve. 

The Finetek EG3 also includes a customized installation mechanism that allows the level transmitter to be installed or removed without taking the system out of service.  The EG3 level transmitter is currently used by a global leader in the manufacture of large scale industrial chillers.

How it works ….The EG3 continuous level transmitter uses the principles of buoyancy and magnetostriction to accurately measure the changing level of coolant.  A float, appropriately sized for the specific fluid density, is mounted on the level transmitter stem such that the float will travel up and down due to the buoyancy of the fluid being measured.  The float contains a magnetic element.

To locate the float position the EG3 level transmitter electronics sends a short current pulse down a sensor wire located within the transmitter stem with a specific frequency, setting up a magnetic field along its entire length.  This field interacts immediately with the field generated by the magnet contained within the float.  The overall effect is that during the brief time that the current flows, a torsional force is produced in the wire, much like a sonic vibration or wave, and travels back to the EG3 electronics.

A timing circuit exists within the electronics which measures the time-of-flight (TOF) between the start of the current pulse and the return signal. In this manner the float’s location (and therefore the fluid level) is very precisely determined and presented as a level signal by the transmitter, typically 4-20mA.

Finetek, Ltd is a leading global manufacturer of instrumentation and other devices for the liquid and bulk solids process industries.

For more information about the EG3 level transmitter application in chillers please contact Finetek, Ltd. at +886-2-2269-6789 or email us at info@fine-tek.com.

In the United States contact our subsidiary Aplus Finetek Sensor, Inc. at 815-632-3132 or info@aplusfine.com.

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