Probe for measuring flow rate and/or temperature of a flowing medium
US4345465A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1980 |
| Grant date | Aug 24, 1982 |
| Priority date | — |
| Expiry date | May 8, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/692
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A carrier strip of polyimide resin sheet material carries on one face an etched pattern of metallization comprising temperature-independent resistors formed of an underlying metallization layer of tantalum base, temperature-dependent resistors in which the effect of the upper layer of metallization, of a nickel base, is predominant, and conductive paths provided by broader strips of the nickel base material. A cover layer of the same heat-resistant resin sheet material is sealed and bonded to the carrier strip wherever a metallization layer does not intervene, taking care to leave open certain contact areas for the attachment of connecting leads. A holder structure holds the strips at each end and provides clear space for attaching connecting leads as well. The holder structure is designed to allow the flow of medium to pass in good thermo contact with the portion of the device enclosing the resistance elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.