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Gauges, Thermometers & Accessories • Accessories

BTW Thermowell - Brass Thermowell
FNW BTW Thermowell, Brass Thermowell

BTW Thermowell
Catalog Spec Sheet Spec Sheet for BTW Thermowell MasterSpec log
Tech Guide
Drawings for Figure BTW — Brass Thermowell for 9" Industrial Thermometers
PDF drawing DWG drawing -- AutoCAD required to open  *AutoCAD required to open DWG (free download)

Always verify that you have the most recent product specifications
or other documentation prior to the installation of these products.

Designed for use with all 9" (228mm) industrial thermometers to create a "sealed system". Thermowells provide insertion of various temperature instruments while protecting them from damage due to process media pressure, abrasion, velocity, or corrosion. In addition, thermowells allow for removal of temperature instruments for repair, replacement, or calibration without the need to shut down or drain the process.


  • Brass Construction
  • Accepts 3.5" (90mm) Stem
  • 7/16" Bore Diameter Taper
  • Stepped Standard Form
  • 3/4" MNPT Process Connection
  • 1-1/4"-18 UNEF Instrument Connection
  • CAN/CGSB 14.4-M88 Compliant
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