Electrical resistors – Resistance value responsive to a condition – Ambient temperature
Patent
1992-12-30
1994-04-05
Lateef, Marvin M.
Electrical resistors
Resistance value responsive to a condition
Ambient temperature
338269, 338270, 338275, H01C 102, H01C 300
Patent
active
053009169
ABSTRACT:
A sensor element for a thermal type flowmeter including a ceramic substrate, a thin film, resistor of platinum provided on the outer surface of the ceramic substrate and an outer protective layer of glass provided for protecting the resistor. The glass contains Na.sub.2 O and K.sub.2 O in a total amount of up to 3 mol %. The sensor element has a temperature coefficient of resistance approximate to the bulk value of platinum, and can be fabricated with little variation.
REFERENCES:
patent: 4361597 (1982-11-01), Arima et al.
patent: 4513615 (1985-04-01), Sato et al.
patent: 5020214 (1991-06-01), Tsuruoka et al.
Ishiguro Fujio
Nakajima Hiroshi
Lateef Marvin M.
NGK Insulators Ltd.
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