Wireless Temperature Sensor Operating in Complete Metallic Environment Using Permanent Magnets

Lokesh A. Gupta, Birck Nanotechnology Center, Purdue University
Dimitrios Peroulis, Birck Nanotechnology Center, Purdue University

Date of this Version



IEEE Transactions on Magnetics ( Volume: 48, Issue: 11, Nov. 2012 )


This paper presents the first wireless temperature sensor operating in a complete metallic environment using permanent rare-earth magnets. The sensor is based on change in magnetic field strength with temperature, which is detected using commercially available Hall Effect sensors. Temperature of a hot plate at a distance of 19 mm in air and through a 9.5-mm-thick nonmagnetic austenitic stainless steel plate is successfully detected from 5 degrees C to 80 degrees C as a proof-of-concept demonstration. The curve fit values show excellent response with R-2 value greater than 98% for both the cases.


Nanoscience and Nanotechnology