05448603 is referenced by 2 patents and cites 11 patents.

A fluid detector (20) has an enclosure (32) defining an internal chamber (33). The enclosure has a frangible wall portion (34). A sensor (46) is arranged within the chamber. The sensor has a hygroscopic portion (48), the electrical resistance of which changes depending upon whether the sensor portion is wet or dry. The chamber is normally filled with a dry fluid, such as nitrogen. The outer surface of the enclosure is exposed to another fluid containing water. When the pressure differential across the frangible wall portion exceeds a predetermined minimum value, the frangible wall portion ruptures to permit the sensor portion to become wetted. An ammeter (31) is arranged to determine the change in the electrical resistance of the sensor and to indicate the presence of the water-containing fluid within the chamber. The detector is particularly useful in determining the fluid-tight sealed integrity of a closed-end thimble having a portion inserted into a pressurized water reactor.

Title
Pressure-sensitive variable-resistance hygroscopic fluid detector, and method
Application Number
8/146935
Publication Number
5448603
Application Date
November 1, 1993
Publication Date
September 5, 1995
Inventor
James E Lynch
Elmira
NY, US
Agent
Phillips Lytle Hitchcock Blaine & Huber
Assignee
Imaging & Sensing Technology Corporation
NY, US
IPC
G21C 17/00
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