Flanged Thermowells

Thermowells - Solid or Welded Construction

  • Ideal for when an application demands the removal of a sensor without interrupting the process
  • Our thermowells can either be of welded construction with a parallel sheath or machined from solid with a parallel or tapered sheath
  • Available in a variety of constructions with plain or drilled flanges. Other flanges are available upon request
  • Custom built in a wide range of sheath materials to meet customer requirements on a prompt delivery
  • Testing and Certification services include:
    ASME PTC 19.3 TW-2010 (wake frequency calculation), pressure testing, MTC’s, X-Ray, dye penetration, full penetration weld and NACE MR0175 (hardness test)

Thermowell Enquiry Form

1. Thermowell Style

Illustration Select
Welded flange onto a welded end fabricated Thermowell with a female threaded connection. Parallel sheath.
Welded flange onto a machined from solid Thermowell with a female threaded connection. Tapered or Parallel sheath.

Vanstone Style. Machined from solid, designed to be mounted between two mating flanges. Dimensions should correspond to mating raised face of process flange. Tapered or stepped.

2. Sheath Material
3a. Outer Diameter ('P1')

3b. Bore Diameter

4a. Flange Details
4b. Sensor Entry Thread

5. Insertion Length 'U'

6. Sheath Options

Illustration Select
7. Taper Details ('P2')

8. Quantity Required

Contact Details

Company Name

Your Name




Additional Information

If your enquiry is for more than one style of sensor, please email us with your requirements or use the box below

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Thermocouple Sensors
Mineral Insulated Thermocouples
Thermocouples with Mini Plug
Thermocouples with Terminal Head
Thermocouples with Cable
High Temperature Thermocouples
General Purpose Thermocouples
ATEX/IECex Thermocouple Sensors
Ceramic Thermocouple Sensors
Fast Response Thermocouple Sensors
Autoclave Thermocouple Sensors
Surface Measurement Thermocouple Sensors
FEP Insulated Thermocouple

Platinum Resistance Thermometers
Mineral Insulated RTD Pt100 Sensors
Rigid Stem RTD Pt100 Sensors
Hand Held RTD Pt100 Sensors
Surface Measurement RTD Pt100 Sensors
RTD Pt100 Sensors with Cable
RTD Pt100 Sensors with Mini Plug
Autoclave RTD Pt100 Sensors
RTD Pt100 with Terminal Head
ATEX/IECex Platinum Resistance Thermometers
Fast Response RTD Pt100 Sensors
Air Temperature RTD Pt100 Sensors
Magnetic RTD Pt100 Sensors
PVC Single Pair Thermocouple Cable
PFA Single Pair Thermocouple Cable
Fibreglass Single Pair Thermocouple Cable
PVC Multipair Thermocouple Cable
PFA Multipair Thermocouple Cable
Fibreglass Multipair Thermocouple Cable
PVC RTD Pt100 Cable
PFA RTD Pt100 Cable
Fibreglass RTD Pt100 Cable

Miniature Thermocouple Connectors
Mini Thermocouple Connectors – 220ºC Rated
Mini Thermocouple Connectors – 350ºC Rated
Mini Thermocouple Connectors – 650ºC Rated
Mini Thermocouple Connector Accessories
Mini Thermocouple Connector Panels
Mini Three Pin Connectors

Standard Thermocouple Connectors
Standard Thermocouple Connectors – 220ºC
Standard Thermocouple Connectors – 350ºC Rated
Standard Thermocouple Connectors – 650ºC Rated
Standard Thermocouple Connector Accessories
Standard Thermocouple Connector Panels
Standard Three Pin Connectors
Hand Held Indicators
Panel Indicators
Temperature Transmitters
Temperature Controllers
Temperature Programmers
Temperature Calibrators
Chart Recorders
Multi Channel Indicator
DIN Rail Mounted Transmitters
Head Mounted Transmitters
ATEX/IECEx Rated Transmitters
Dry Block Calibrator
Temperature Dataloggers

Temperature Accessories
Compression Fittings
Pressure and Vacuum Feedthroughs
ATEX/IECEx Compression Fittings

UKAS Calibration Services

Pressure Gauges
Pressure Transmitters

© 1998- TC Ltd., P.O. Box 130, UXBRIDGE, UB8 2YS, United Kingdom
Tel.: 01895 252222, Email:
© 1998- TC Ltd., P.O. Box 130, UXBRIDGE, UB8 2YS, United Kingdom
Tel.: 01895252222, Email:

2 Sheath Material Operational
Standard Sheath Materials
316 Grade 316L Stainless Steel
18/8/1 Ni/Cr/Molybdenum Stabilised
To BS EN 10088,
Werkstoff No : 1.4404

Very good corrosion resistance throughout the operating temperature range. Suited to a wide range of industrial applications. Enjoys high ductility.

310 Grade 310 Stainless Steel
25/20 Nickel/Chromium
To BS EN 10088,
Werkstoff No : 1.4845
Good high temperature corrosion resistance and suitable
for use in sulphur bearing atmospheres. Has high oxidation resistance.
600 Inconel 600*
Nickel/Chromium/Iron alloy
To BS EN 10095,
Werkstoff No : 2.4816
Used in severely corrosive atmospheres to elevated temperatures. Has good resistance to oxidation. Do not
use in sulphur bearing atmospheres above 550ºC.
800 Incoloy 800*
Iron/Nickel/Chromium alloy
To BS EN 10095,
Werkstoff No : 1.4876
Used in severely corrosive atmospheres to elevated temperatures. Enjoys a good resistance to oxidation and carburisation. Resistant to sulphur bearing atmospheres. 1100°C
820 Incoloy 825*
Iron/Nickel/Chromium alloy
To BS EN 10204,
Werkstoff No : 2.4858
Highly resistant to corrosion & oxidising conditions.
particularly useful when used in acidic environments.
Specialized Sheath Materials
276 Hastelloy 276*
To ASTM B574,
Werkstoff No : 2.4819
Excellent general corrosion resistance and good fabricability. Highly popular for chemical and petrochemical processing applications. 1250°C
400 Monel 400
Nickel 30% Copper/Iron
To BS 3076,
Werkstoff No : 2.4360
Particularly resistant to corrosion by seawater, Monel has high strength and toughness over a wide temperature range. 1250°C
Other sheath materials are available upon request.
* Trade Names
4a Dia. Rating /
Nominal Pressure
FL05 1/2" Class 150 to 2500 (lb)
PN 10 to 250 (bar)
5K and 10K (Kg/cm3)

FF (Flat Face)
RF (Raised Face)
RTJ (Ring Type Joint)
TRI (Tri Clamp)

Flanges are manufactured in accordance with internationally recognised standards such as ANSI, DIN or JIS.
FL15 1+1/2"
FL20 2"

Generally, flanges are supplied in 304 or 316 stainless steel, however other materials are available to match exotic sheathings. Other types of flange are available, please contact us for details.