Pressure measuring apparatus with temperature compensating means
US4279160A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1979 |
| Grant date | Jul 21, 1981 |
| Priority date | — |
| Expiry date | Oct 23, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L19/0645
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pressure measuring apparatus using process transmission media and comprising measuring and compensation systems. These systems have the substantially same construction which comprises a pressure receiving portion, a pressure transmitting portion and a pressure detecting portion. The pressure transmitting portion is divided into two sections, each of them contains a liquid NaK and a heat-resisting inert liquid, respectively, as pressure transmission media. A pressure of a fluid to be measured which is introduced into the pressure receiving portion of the measuring system is transmitted through the transmitting portion to the pressure detecting portion where the pressure is detected. A pressure of a gas introduced into the pressure receiving portion of the compensation system is detected in the pressure detecting portion of the compensation system in a same manner. The temperature compensation is conducted by subtracting a detected pressure in the compensation system from that in the measuring system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.