Electrically detected impedance detector for the measurement of physical quantities, in particular of temperature or humidity, and process for the manufacture of said detectors

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United States of America Patent

PATENT NO 5631418
SERIAL NO

08312886

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Electrical impedance detector for measurement of physical quantifies, in particular of temperature or humidity. The detector comprises conductor electrodes (10a, 10b; 10A,10W), between which the electrical impedance (C.sub.M) that represents the physical quantity to be measured is measured. Between the conductor electrodes (10a, 10b;10A, 10W) there is an active material (11;11P) whose impedance properties are a function of the physical quantity to be measured. The detector is composed of pieces cut-off out of a continuous detector filament (20; 20H;20K), which detector filament (20;20H;20K) comprises a conductive electrode wire or an assembly of electrode wires (10a, 10b; 10A, 10W), on/between which there is an active material (11;11P) whose impedance properties are a function of the physical quantity to be measured. Further, a novel process is described for the manufacture of said detectors.

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Patent Owner(s)

  • VAISALA OY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ponkala, Jorma Ylonkyla, FI 9 115
Stuns, Ingmar Helsinki, FI 5 54
Tammela, Simo Espoo, FI 21 368
Turtiainen, Heikki Vantaa, FI 6 257

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