Temperature control system for liquid chromatographic columns employing a thin film heater/sensor
US4484061A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1982 |
| Grant date | Nov 20, 1984 |
| Priority date | — |
| Expiry date | May 13, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/6606
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature control system for a liquid chromatographic column includes a thin film heater/sensor comprising a foil-like patterned heating element adhesively mounted between a pair of flexible electrically insulative layers. A patterned foil-like temperature sensing element is also coextensively adhesively mounted between the insulative layers in temperature sensing relationship to the heating element. The thin film heater/sensor is wrapped around the chromatographic column and is uniformly compressively secured in contact therewith by a spirally tubularly wound length of flexible wrapping. A remote temperature sensing element controls the heat output of the heating element a linear proportional fashion, thereby maintaining a predetermined temperature gradient over the length of the column. A pre and post-column heaters may be similarly wrapped with a thin film heater/sensors so as to appropriately control the temperature of the liquid entering or leaving the column. The heater/sensor may include a plurality of foil-like patterned heating elements and sensors displaced along the length of the column to define a plurality of heating zones controlled by a patterned foil-like temper…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.