Abstract
Magnetoelastic thin film sensors can be considered the magnetic analog of surface acoustic wave sensors, with the characteristic resonant frequency of the magnetoeleastic sensor changing in response to different environmental parameters. We report on the application of the magnetoeleastic sensors for remote query measurement of pressure, temperature, liquid viscosity and, in combination with a glucose- responding mass-changing polymer, glucose concentrations. The advantage of using magnetoelastic sensors is that no physical connections, such as wires or cables are required to obtain sensor information allowing the sensor to be monitored from inside sealed containers. Furthermore since it is the frequency response of the sensor that is monitored, rather than the amplitude, the relative orientation of the sensor with respect to the query field is unimportant.
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