Sensor
US6137669A · kind A · utility
Inventors
Key dates
| Filing date | Oct 28, 1998 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Oct 28, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K2003/145
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A laminar sensor for detecting changes on a laminar substrate. The sensor includes a laminar sheet which has a first surface and a second opposite surface, and is made from a conductive polymer composition which exhibits PTC behavior. A plurality of sensing elements are electrically connected in series on the sensor. Each sensing element is formed as an electrode pair containing a first electrode and a second electrode. The first and second electrodes may be on the same surface of the laminar sheet or on opposite surfaces of the sheet. Two electrical leads are present for connecting the sensing elements into a circuit, which may be used to detect changes in resistance which occur when a sensing element is exposed to an elevated temperature, a change in pressure, or a solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.