| Title | Video-camera-based sensor to measure gas/oil interface heights for pressures up to 17 MPa |
| Publication Type | Journal Article |
| Year of Publication | 1999 |
| Authors | Fitzgerald, M.P., Sutton C.M., and Jack D.G. |
| Journal | Metrologia |
| Volume | 36 |
| Issue | 6 |
| Pagination | 627 - 629 |
| Date Published | 1999 |
| ISSN | 00261394 (ISSN) |
| Keywords | Cylinders (shapes), Phase interfaces, Pressure balances, PRESSURE MEASUREMENT, Pressure transducers, Remote sensing, Sensors, Video cameras |
| Abstract | This paper describes a gas/oil interface height sensor for determining the fluid head corrections when comparing a gas-operated pressure balance with an oil-operated pressure balance. The sensor can also be used to establish the balance point of the comparison from the rate of change of the interface height. In the sensor, a video camera views the interface within a transparent pressure cell. The cell is made from a polished polycarbonate cylinder, outer diameter 50 mm, inner diameter 10 mm, designed for a working pressure of 17 MPa. A safety shield surrounds the cell. The video camera magnifies the image of the interface and a reference scale in the cell, allowing them to be viewed remotely. The sensor can measure interface heights with a standard uncertainty of 0.05 mm. Results of a comparison of pressure balances using the sensor show that over the range 1.6 MPa to 11 MPa, the balance points can be determined with a standard uncertainty of less than 4 Pa. |
| URL | http://www.scopus.com/inward/record.url?eid=2-s2.0-0033295270&partnerID=40&md5=90de3380b700b93921d2ee8a906a7a96 |
| DOI | 10.1088/0026-1394/36/6/28 |
