Wireless temperature sensor for mechanical face seals using permanent magnets

Lokesh A. Gupta, Purdue University, Birck Nanotechnology Center
Lionel Young, Flowserve Corp.
Berhanu Wondimu, Flowserve Corp.
Dimitrios Peroulis, Purdue University, Birck Nanotechnology Center

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This paper presents a unique wireless temperature sensor operating through metal enclosure for mechanical face seal applications. The sensor is based on temperature-induced magnetic field change in permanent magnets sensed remotely by a Hall effect sensor. The sensor has been tested from 5 degrees C to 78 degrees C and has shown excellent linear results with curve fit value of 98%. Furthermore, the sensor concept is verified by performing dynamic tests at 1800 rpm and 12 bar pressure using water as system fluid in a seal test rig. The proposed sensor response is compared to a thermocouple attached to the seal stator where excellent agreement is obtained. (C) 2013 Elsevier B.V. All rights reserved.


Nanoscience and Nanotechnology