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1. (WO2018005082) PROCESS FLUID TEMPERATURE MEASUREMENT SYSTEM WITH IMPROVED PROCESS INTRUSION

Pub. No.:    WO/2018/005082    International Application No.:    PCT/US2017/037222
Publication Date: Fri Jan 05 00:59:59 CET 2018 International Filing Date: Wed Jun 14 01:59:59 CEST 2017
IPC: G01K 13/02
Applicants: ROSEMOUNT INC.
Inventors: TRIMBLE, Steven
RUD, Jason
Title: PROCESS FLUID TEMPERATURE MEASUREMENT SYSTEM WITH IMPROVED PROCESS INTRUSION
Abstract:
A process fluid temperature measurement system (300) includes a thermowell (200) configured to couple to a process fluid conduit and extend through a wall (102) of the process fluid conduit. A temperature sensor assembly (110) is disposed within the thermowell (200) and includes a first temperature sensitive element (304) and a second temperature sensitive element (306). The first temperature sensitive element (304) is disposed within the thermowell (200) adjacent a distal end (305) of the thermowell (200). The second temperature sensitive element (306) is spaced apart from the first temperature sensitive element (304) along a spacer (308) having a known thermal conductivity. Transmitter circuitry (311) is coupled to the first (304) and second temperature sensitive elements (306) and is configured to perform a heat flux calculation to provide a process fluid temperature output.