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Gauges, Thermometers & Accessories • Accessories

BTWELL Thermowell - Brass Thermowell
FNW BTWELL Thermowell, Brass Thermowell

BTWELL Thermowell
Catalog Spec Sheet Spec Sheet for BTWELL Thermowell MasterSpec log
Tech Guide
Drawings for Figure BTWELL — 3-1/2" Brass Thermowell, 3/4" Connection
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.

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 the process.


  • Configuration:
    • Threaded Taper
  • Connection:
    • Socket Length: 3-1/2"
    • Process Connection: 3/4"-14 NPT
    • Instrument Connection: 1-1/4"-18 UNEF
  • Material:
    • JIS-3771 Brass
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