Thermocouple shield

Details Thermocouple shield Thermocouple shield

2007-03-19

2009-11-24

Caputo, Lisa M (Department: 2855)

Thermal measuring and testing

Housing, support, or adjunct

C374S141000, C374S179000, C136S230000

Reexamination Certificate

active

07621672

ABSTRACT:
A thermocouple shield for use in radio frequency fields. In some embodiments the shield includes an electrically conductive tube that houses a standard thermocouple having a thermocouple junction. The electrically conductive tube protects the thermocouple from damage by an RF (including microwave) field and mitigates erroneous temperature readings due to the microwave or RF field. The thermocouple may be surrounded by a ceramic sheath to further protect the thermocouple. The ceramic sheath is generally formed from a material that is transparent to the wavelength of the microwave or RF energy. The microwave transparency property precludes heating of the ceramic sheath due to microwave coupling, which could affect the accuracy of temperature measurements. The ceramic sheath material is typically an electrically insulating material. The electrically insulative properties of the ceramic sheath help avert electrical arcing, which could damage the thermocouple junction. The electrically conductive tube is generally disposed around the thermocouple junction and disposed around at least a portion of the ceramic sheath. The concepts of the thermocouple shield may be incorporated into an integrated shielded thermocouple assembly.

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patent: 2007-17212 (2007-01-01), None
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http://www.universal-thermosensors.co.uk/thermocouples/tc-front-page.htm, Thermocouple Introduction, Universal Thermosensors Limited, Castle Road Technical Centre, Murston, Sittingbourne, Kent. ME10 3RG, United Kingdom (8 pp.).

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