A thermal conductivity detector comprises a housing having an internal cavity, a fluid inlet, a fluid outlet, a first bore and a second bore. The thermal conductivity detector further comprises a thermistor having a first electrical lead and a second electrical lead, a first contact pin in electric
A thermal conductivity detector comprises a housing having an internal cavity, a fluid inlet, a fluid outlet, a first bore and a second bore. The thermal conductivity detector further comprises a thermistor having a first electrical lead and a second electrical lead, a first contact pin in electrical communication with said first electrical lead and a second contact pin in electrical communication with said second electrical lead. The first contact pin is oriented within the first bore, the second contact pin is oriented within the second bore and the thermistor is suspended within the gas analysis chamber.
대표청구항▼
The invention claimed is: 1. A thermal conductivity detector comprising: a housing having an internal gas analysis chamber, a fluid inlet passageway in communication with the gas analysis chamber, a fluid outlet passageway in communication with the gas analysis chamber, and a first bore extending t
The invention claimed is: 1. A thermal conductivity detector comprising: a housing having an internal gas analysis chamber, a fluid inlet passageway in communication with the gas analysis chamber, a fluid outlet passageway in communication with the gas analysis chamber, and a first bore extending through at least a portion of the housing, the first bore in fluid communication with the gas analysis chamber, the first bore offset from the fluid inlet passageway and the fluid outlet passageway; a thermistor having an electrical lead; and a first contact pin electrically connected to said electrical lead; wherein the first contact pin is oriented within the first bore, and the first contact pin is electrically insulated from the housing and mechanically secured to the housing. 2. The thermal conductivity detector of claim 1, further comprising a second contact pin, the housing further comprising a second bore in fluid communication with the gas analysis chamber, the thermistor further comprising a second electrical lead electrically connected to the second contact pin, wherein the second contact pin is oriented within the second bore, and the second contact pin is electrically insulated from the housing and mechanically secured to the housing. 3. The thermal conductivity detector of claim 2, wherein the thermistor is suspended between the first contact pin and the second contact pin via the first and second electrical leads. 4. The thermal conductivity detector of claim 3, wherein the thermistor is coaxially aligned with the fluid inlet passageway and the fluid outlet passageway. 5. The thermal conductivity detector of claim 1, further comprising an end plate made from an electrically insulative material. 6. The thermal conductivity detector of claim 5, wherein the end plate comprises a channel, the first contact pin oriented within the channel. 7. The thermal conductivity detector of claim 1, further comprising a heating device oriented about the housing. 8. The thermal conductivity detector of claim 7, wherein an outer periphery of the housing further comprises threadings, the heating device comprises a resistive wire, and the resistive wire is wrapped about the housing in a continuous groove formed by the threadings. 9. The thermal conductivity detector of claim 7, further comprising a temperature sensor, wherein the housing further comprises a sensor cavity and the temperature sensor is located within the sensor cavity. 10. The thermal conductivity detector of claim 9, wherein the temperature sensor is located between the heating device and the gas analysis chamber. 11. The thermal conductivity detector of claim 9, further comprising an end plate made from an electrically insulative material, the end plate comprising a sensor aperture, wherein wires from the temperature sensor pass through the sensor aperture. 12. A thermal conductivity detector comprising: a body housing comprising an internal body housing cavity and a fluid inlet passageway in fluid communication with the internal body housing cavity; a sensor housing comprising an internal sensor housing cavity, a fluid outlet passageway in fluid communication with the internal sensor housing cavity, a first bore and a second bore, each bore offset from the fluid outlet passageway; a thermistor comprising a first electrical lead and a second electrical lead; and a first contact pin in electrical communication with said first electrical lead and a second contact pin in electrical communication with said second electrical lead; wherein at least a portion of the sensor housing is oriented within the internal body housing cavity such that overlapping portions of the internal sensor housing cavity and the internal body housing cavity comprise a gas analysis chamber, the first contact pin is oriented within the first bore, the second contact pin is oriented within the second bore and the thermistor is oriented within the gas analysis chamber. 13. The thermal conductivity detector of claim 12, wherein the first contact pin and the second contact pin are mechanically secured to the sensor housing and electrically insulated from the sensor housing. 14. The thermal conductivity detector of claim 12, wherein an inner surface of the internal body housing cavity and an outer surface of the sensor housing comprise complimentary threadings. 15. The thermal conductivity detector of claim 12, further comprising an end plate made from an electrically insulative material. 16. The thermal conductivity detector of claim 15, wherein the first contact pin passes through an aperture in the end plate. 17. The thermal conductivity detector of claim 16, wherein the end plate further comprises a channel, and a portion of the first contact pin is oriented within the channel. 18. The thermal conductivity detector of claim 15, further comprising a temperature sensor, the body housing further comprising a sensor cavity, the end plate further comprising a sensor aperture, wherein the temperature sensor is mounted in the sensor cavity and electrical connections for the temperature sensor pass through the sensor aperture. 19. The thermal conductivity detector of claim 12, further comprising a heating wire, wherein an outer periphery of the body housing further comprises threadings and the heating wire is wrapped about the housing in a continuous groove formed by the threadings. 20. The thermal conductivity detector of claim 12, wherein the first electrical lead of the thermistor is coated with a curable composition.
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