PFA Thermowells

Our range of PTFE thermowells are ideally suited to applications which require resistance to attack from virtually all known chemicals, oils and fluids. For use with our range of 0.250” diameter stainless steel sheathed thermocouple or Pt100 sensors, they are gas, steam and water tight to a pressure of 15PSI. Used in applications where the removal of the sensor could prove complicated such as in a vessel, pipe or tank. They are 0.472” O.D. and are available with a 1/2” NPT taper process entry thread and 1/4” NPT parallel sensor entry thread. Immersion length (under the thread) is either 3.25” (to suit our 6” long sensors), 9.25” (for 12” long sensors) 15.25” (for 18” long sensors) or 33.25” (for 36” long sensors). Use a 1/4” NPT PTFE fitting (or stainless steel if clear of the difficult environment) to attach the sensor to the thermowell.
  • Available in 3.25”, 9.25”, 15.25” and 33.25” insertion lengths for use respectively with 6”, 12”, 18” and 36” long temperature sensors
  • Sheath material: PTFE
  • Male Thread: 1/2” NPT, Female Thread: 1/4” NPT
  • Operating range: -100ºF to +482ºF (-75ºC to +250ºC)
The following types are available:
PFA Thermowell for use with 0.250" Sensors
Order Code Description 1 - 4 5 - 9 10 - 19 Buy
284-668 3.25" insertion for 6" long sensors $77.00 $70.00 $64.00 Add
284-676 9.25" insertion for 12" long sensors $89.00 $82.00 $75.00 Add
284-684 15.25" insertion for 18" long sensors $127.00 $116.00 $105.00 Add
284-692 33.25" insertion for 36" long sensors $477.00 $435.00 $397.00 Add
276-300 1/4 in NPT PTFE fitting to suit a 0.250" sensor $46.20 $42.10 $38.50 Add
675-493 1/4" NPT stainless steel fitting to suit a 0.250" sensor $14.00 $12.80 $11.70 Add
784-100 Standard Heat Transfer Compound - 1.18 fl ozs (265°F) $67.00 $61.00 $57.00 Add
784-150 Plus Heat Transfer Compound - 1.69 fl ozs (390°F) $150.00 $136.00 $126.00 Add