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System and method for monitoring environmental conditions

  • US 20060139200A1
  • Filed: 12/23/2005
  • Published: 06/29/2006
  • Est. Priority Date: 12/24/2004
  • Status: Active Grant
First Claim
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1. A system for monitoring environmental conditions of a perishable product, the system comprising:

  • an environmental sensor configured to sense one or more environmental conditions of the perishable product;

    an analog integrator in communication with the environmental sensor, the analog integrator being formed on a polymer substrate and including one or more tunable components;

    a comparator in communication with the analog integrator and configured to change state when an output of the analog integrator reaches a selected threshold level; and

    a control module in communication with the comparator and the analog integrator, wherein the control module is configured to control the operation of the analog integrator based on an output of the comparator.

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