Ungrounded three wire thermocouple

Details Ungrounded three wire thermocouple Ungrounded three wire thermocouple

1978-08-18

1980-09-23

Sebastian, Leland A.

Batteries: thermoelectric and photoelectric

Thermoelectric

Having housing, mounting or support

73359R, 136230, 136232, 310 54, 310 55, H01L 3502

Patent

active

042244617

ABSTRACT:
An ungrounded three wire thermocouple has two thermocouple wires and a ground wire assembled in a metal cylindrical housing which can be immersed in a fluid whose temperature is to be monitored by the thermocouple. The thermocoupled housing may have an insulation surface to electrically insulate the housing from the equipment being monitored and to be isolated from the ground or potential of the equipment being monitored. The ground wire in the thermocouple assembly can be connected to the instrument grounds of the instrumentation which measures or otherwise utilizes the output of the thermocouple wires. The thermocouple is disclosed as being immersed in either a liquid or a gaseous cooling medium. A second embodiment of the invention uses two spaced three wire thermocouples mounted on an insulation support and are exposed to the flow of a gaseous medium whose temperature is to be monitored.

REFERENCES:
patent: 4131756 (1978-12-01), Smith

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