A remote sensing device includes a sensor and reference circuit. A
resonant circuit of the sensor has a resonant characteristic modifiable
by exposure to an external condition. The sensor is configured to produce
a sensor signal associated with the modifiable resonant characteristic. A
reference circuit of the remote sensing device is configured to produce a
reference signal suitable for use in conjunction with the sensor signal.
The reference signal is used to account for variations of the sensor
signal due to variations in the inductive coupling between the remote
sensing device and a reader designed to detect the reference signal and
the sensor signal.