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International Journal of Thermophysics

, Volume 29, Issue 3, pp 1156–1165 | Cite as

Thermal Noise Sensor Insulation Using Ultra-thin Ceramic Coatings

  • O. Kerkhof
  • E. Houtzager
  • J. v. Wensveen
  • E. Maloney
Article

Abstract

The insulation resistance and interference rejection of several prototype thermal noise sensors were measured. It was found that twisting the connecting wires as a pair optimizes the magnetic interference rejection. High-temperature-resistant wire insulation was developed by vapor depositing a few micrometer thick ceramic coating. The best insulation was obtained with a coating of 1.25μm SiO2 + 1.5μm TiO2 + 0.25μm ZrO2. The insulation of four such coated pairs reached stable levels of 18 ± 3kΩ during a testing period of 1 week at 950°C under atmospheric conditions.

Keywords

Ceramic coating Insulation resistance Interference rejection Noise thermometer Twisted pair 

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • O. Kerkhof
    • 1
  • E. Houtzager
    • 1
  • J. v. Wensveen
    • 2
  • E. Maloney
    • 3
  1. 1.Nederlands Meetinstituut, Van Swinden LaboratoriumDelftThe Netherlands
  2. 2.Tempcontrol Industrial Electronic ProductsVoorburgThe Netherlands
  3. 3.Everest CoatingsDelftThe Netherlands

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