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Water Sensor and Eliminator for Dielectric Coolants

IP.com Disclosure Number: IPCOM000073920D
Original Publication Date: 1971-Feb-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Aakalu, NG: AUTHOR

Abstract

The principle involved in the operation of this sensor is that the surface tension of water is 3 to 4 times greater than that of most coolant liquids, and thus, the water can rise 5 to 6 times higher than the coolant liquids n any given capillary porous material.

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Water Sensor and Eliminator for Dielectric Coolants

The principle involved in the operation of this sensor is that the surface tension of water is 3 to 4 times greater than that of most coolant liquids, and thus, the water can rise 5 to 6 times higher than the coolant liquids n any given capillary porous material.

A wick material 10 is held so that one end is just touching the liquid surface
12. The water 14, if any is present, floats on the coolant surface 12 and is picked up by the wick material 10. As the water 14 moves by capillary action towards the heater zone 16, it contacts the first of two thermistors. The water 14 contacting the first thermistor 18 changes its temperature relative to the second thermistor 20 located above, thereby, creating a temperature differential which signal is used for starting the heaters or sounding an alarm. The thermistors 18,20 are located high enough such that the liquid coolant cannot rise to that level and a false alarm is prevented. Thus, the existence of water is detected. The water continues to rise in the wick material 10 until it reaches the heater zone 16 where it is evaporated. The water vapor is absorbed by a surrounding absorbant 22.

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