Patent ID: 6499353
Filing Date: 2002-12-31
Classification: G01K,G01L

Abstract:
A method of determining the value of a physical property inside a sealed container, said physical property selected from the group consisting of pressure and temperature, comprising the steps of:(a) sensing a value of said physical property with a self contained transducer positioned inside of said container, wherein said value is indicated by a movement of a magnet in a direction that maintains an orientation of the magnet at an approximately constant distance from a wall of the container, creating a magnetic field which may be sensed on the exterior of said wall; (b) radiating a magnetic field from said magnet inside said container, the orientation of the magnet having a characteristic indicative of said value, thereby causing an external magnetic field outside of said container, said external field having a corresponding characteristic indicative of said value; and (c) responding to said external field to display an indication of said value.