초록 ▼

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 a

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 temperature sensing element in sensing relation to respective one of the zones.

대표청구항 ▼

A temperature control system for a chromatographic column comprising in combination: a first thin film heater for removable wrap mounting about an exterior surface of a chromatographic column, comprising a foil-like patterned heating element adhesively mounted between upper and lower flexible, elect

A temperature control system for a chromatographic column comprising in combination: a first thin film heater for removable wrap mounting about an exterior surface of a chromatographic column, comprising a foil-like patterned heating element adhesively mounted between upper and lower flexible, electrically insulative layers and including a patterned foil-like temperature sensing element integrally coextensively mounted in temperature sensing relation to said heating element; retainer means coextensive with said thin film heater for removably compressively securing said thin film heater and the chromatographic column in heat transfer relation; and temperature control means responsively coupled to said sensing element for controlling the watt density applied to said heating element in a linear proportional fashion, thereby maintaining a predetermined temperature gradient over the length of the chromatographic column.