Patent ID: 6832507
Filing Date: 2004-12-21
Classification: A61F,G01N

Abstract:
A system with at least one sensor for detecting the presence of moisture, comprising:a resonant circuit having a resonance frequency and being at least partly formed from a moisture sensitive material having an electrical resistance which increases when in contact with moisture, comprising: a) transmitter-receiver means for generating an electromagnetic interrogation field comprising at least one frequency component corresponding to the resonance frequency of said resonance circuit and being structured and arranged relative to said at least one sensor such that the electromagnetic interrogation field generated by said transmitter-receiver means is wirelessly propagated; b) said at least one sensor being arranged to be wirelessly activated by said electromagnetic interrogation field when present in the electromagnetic interrogation field to generate a response to the electromagnetic interrogation field; c) said transmitter-receiver means being structured and arranged relative to said at least one sensor such that said response of said at least one sensor about the presence of moisture, is wirelessly received by said transmitter-receiver means, and d) a reading device comprising said transmitter-receiver means for recording said response of said at least one sensor to the electromagnetic interrogation field to obtain information about the presence of moisture at said at least one sensor.