Stainless Steel Thermowells
Description
Stainless steel thermowells are protective enclosures designed to house temperature sensors. They serve as a barrier between the sensor and the process environment, safeguarding the sensor from mechanical and chemical damage. These thermowells are robust enough to withstand high pressure and force, while also being flexible enough to allow the sensor to function effectively.
Working Principle
Stainless steel thermowells work by enclosing the temperature sensor within a pressure-tight barrier. This setup protects the sensor from environmental factors such as high pressure, corrosive chemicals, and mechanical wear and tear. By doing so, thermowells ensure the longevity and reliability of the sensors, allowing for maintenance and replacement without interrupting the process. They are particularly useful in maintaining the accuracy of temperature measurements in harsh environments, as they prevent direct exposure of the sensor to the process medium.
Applications
Thermowells are widely used across various industries, including chemical, food processing, petrochemical, cosmetics, power, refining, and pharmaceutical sectors. For example, in the petroleum and gas sector, thermowells are used on onshore drilling rigs to protect sensors from corrosion and extreme pressure, ensuring accurate readings of drilling fluids. In the glass industry, flange weld thermowells provide long life and accurate measurements in high-pressure and high-temperature environments.
Advantages over other Thermowells
Stainless steel thermowells offer several advantages over other types. They provide a robust and reliable seal against the process medium, ensuring safety and reliability in severe conditions. Their design allows for easy integration and interchangeability across different systems and sites, promoting effective sensor management. Additionally, they offer protection from corrosion, extreme pressure damage, and high material velocities, which can save or earn money in industrial applications by reducing the need for frequent sensor replacements and repairs.
Limitations
One limitation of stainless steel thermowells is their temperature range. They are typically limited to use in environments with temperatures below 1150 to 1200 °C (2102 to 2192 °F). Beyond these temperatures, their effectiveness and durability may be compromised.
Considerations
When selecting stainless steel thermowells, several factors should be considered. Initial costs and operating expenses can vary based on the specific design and material used. Durability is generally high, but it is essential to ensure that the thermowell material is suitable for the specific environmental conditions it will face. Accuracy is maintained by protecting the sensor from direct exposure to the process medium. Replacement and maintenance costs are minimized due to the protective nature of thermowells, which extends the life of the sensors and reduces the frequency of necessary replacements.
from Pyromation
A thermowell is a pressure-tight receptacle that protects and extends the life of a temperature sensor in processing applications where the sensor is not mechanically or chemically compatible with the process environment. Installed directly into piping systems, thermowells facilitate sensor... [See More]
- Material of Construction: Stainless Steel
- Connection Means: Threaded
- Bore Diameter: 0.2500 to 0.5000
- Thread Options: 1/2" NPT (optional feature); 3/4" NPT (optional feature)
from Tempco Electric Heater Corporation
If your filter selections do not return your desired results from our standard configurations, please continue to select your Specifications on the right. You can submit your Wish List to Tempco. Thermowells are available in the following materials: Steel. Brass. 316 Stainless Steel. 304 Stainless... [See More]
- Material of Construction: Brass; Monel; Stainless Steel; Other Material (Steel)
- Barrel or Shank Style: Stepped Shank well; Straight Shank; Tapered Shank
- Connection Means: Flanged; Van Stone; Threaded
from ABB Measurement & Analytics
Overview. Solid drilled thermowell. Flanged and screwed designs. To suit ASME PTC19.3 2010-TW. Sized to the millimetre (40 thousands of an inch) [See More]
- Material of Construction: Stainless Steel; Other Material (Hastelloy C-276 / 2.4819, Inconel 600, Monel 400, Duplex, Super duplex, Others)
- Bore Diameter: 0.1378 to 0.5118
- Socket/Stem Insertion Length: 1.97 to 39.33
- Connection Means: Socket-weld or Weld-in; Flanged; Threaded
from Neo-Dyn
Neo-Dyn ® offers a line of standard thermowells for use on its direct mount (100T/132T) or remote mounted (100TC/132TC) temperature switches. Available in 316 stainless steel with 3/4 or 1 inch process connections and insertion lengths up to 12 inches. Specifications. Bore diameter. 100T/132T... [See More]
- Material of Construction: Stainless Steel
- Bore Diameter: 0.2600 to 0.3850
- Socket/Stem Insertion Length: 2.5 to 12
- Thread Options: 3/4" NPT (optional feature); 1" NPT (optional feature)
from ifm efector inc.
Efficient long-time protection of the temperature sensor. Protection against aggressive media and high process pressures. Easy replacement of the temperature sensor during operation. Learn more. From May 1st 2025, products produced in EU and Singapore have an import surcharge reflected in the price. [See More]
- Material of Construction: Stainless Steel
- Connection Means: Threaded
- Socket/Stem Insertion Length: 3.46
- Thread Options: 1/2" NPT
from Pyromation
A thermowell is a pressure-tight receptacle that protects and extends the life of a temperature sensor in processing applications where the sensor is not mechanically or chemically compatible with the process environment. Installed directly into piping systems, thermowells facilitate sensor... [See More]
- Material of Construction: Stainless Steel
- Connection Means: Flanged
- Bore Diameter: 0.2600
- Barrel or Shank Style: Straight Shank (optional feature); Tapered Shank (optional feature)
from Tempco Electric Heater Corporation
Series 10 Straight Shank with .260 Bore for 1/4" Diameter Elements. Standard Duty Threaded. Thermowells are available in the following materials: Steel. Brass. 316 Stainless Steel. 304 Stainless Steel. Monel. [See More]
- Material of Construction: Brass; Monel; Stainless Steel; Other Material (Steel)
- Connection Means: Threaded
- Bore Diameter: 0.2600
- Barrel or Shank Style: Straight Shank
from ifm efector inc.
Efficient long-time protection of the temperature sensor. Protection against aggressive media and high process pressures. Easy replacement of the temperature sensor during operation. Learn more. From May 1st 2025, products produced in EU and Singapore have an import surcharge reflected in the price. [See More]
- Material of Construction: Stainless Steel
- Connection Means: Threaded
- Socket/Stem Insertion Length: 1.06
- Thread Options: 1/2" NPT
from Pyromation
Sanitary-Connected Thermowells are offered in 304 and 316 stainless steel. The DW and DR series are welded constructions, and they are available in a variety of lengths, cap styles, cap sizes, and optional lagging extensions. Thermowells are supplied with a surface finish that meets or exceeds 32... [See More]
- Material of Construction: Stainless Steel
- Connection Means: Socket-weld or Weld-in
- Bore Diameter: 0.2600
- Barrel or Shank Style: Stepped Shank well
from Tempco Electric Heater Corporation
Series 15 Straight Shank — Lagging Extension Type with .260" Bore for 1/4" Diameter Elements. Standard Duty Threaded. Thermowells are available in the following materials: Steel. Brass. 316 Stainless Steel. 304 Stainless Steel. Monel. [See More]
- Material of Construction: Brass; Monel; Stainless Steel; Other Material (Steel)
- Connection Means: Threaded
- Bore Diameter: 0.2600
- Barrel or Shank Style: Straight Shank
from ifm efector inc.
Reliable protection against aggressive media and high flow velocities. Allows the replacement of the temperature sensor in a running process. High pressure resistance. Simple process connection via adapter. Robust stainless steel housing for the requirements of harsh industrial environments. Learn... [See More]
- Material of Construction: Stainless Steel
- Socket/Stem Insertion Length: 2.5
- Stem Length: 4.02
- Connection Means: Socket-weld or Weld-in
from Pyromation
Sanitary-Connected Thermowells are offered in 304 and 316 stainless steel. The DW and DR series are welded constructions, and they are available in a variety of lengths, cap styles, cap sizes, and optional lagging extensions. Thermowells are supplied with a surface finish that meets or exceeds 32... [See More]
- Material of Construction: Stainless Steel
- Connection Means: Socket-weld or Weld-in
- Bore Diameter: 0.2600
- Barrel or Shank Style: Straight Shank
from Tempco Electric Heater Corporation
Series 25 Tapered Shank-Lagging Extension Type with .260" Bore for 1/4" Diameter Elements. Heavy Duty Threaded. Thermowells are available in the following materials: Steel. Brass. 316 Stainless Steel. 304 Stainless Steel. Monel. [See More]
- Material of Construction: Brass; Monel; Stainless Steel; Other Material (Steel)
- Connection Means: Threaded
- Bore Diameter: 0.2600
- Barrel or Shank Style: Tapered Shank
from ifm efector inc.
Reliable protection against aggressive media and high flow velocities. Allows the replacement of the temperature sensor in a running process. High pressure resistance. Simple process connection via adapter. Robust stainless steel housing for the requirements of harsh industrial environments. Learn... [See More]
- Material of Construction: Stainless Steel
from Pyromation
Sanitary Weld-In Thermowells are offered in 304 and 316 stainless steel. The thermowell is designed to be welded into a tank or vat with a full crevice-free fillet-weld to prevent corrosion, bacteria growth, and product contamination. Thermowells are supplied with a surface finish that meets or... [See More]
- Material of Construction: Stainless Steel
- Socket/Stem Insertion Length: 3.25 to 5
- Stem Length: 8.5 to 13.12
- Bore Diameter: 0.2600
from Tempco Electric Heater Corporation
Series 30 Straight Shank with .385" Bore for 3/8" Diameter Elements. Standard Duty Threaded. Thermowells are available in the following materials: Steel. Brass. 316 Stainless Steel. 304 Stainless Steel. Monel. [See More]
- Material of Construction: Brass; Monel; Stainless Steel; Other Material (Steel)
- Connection Means: Threaded
- Bore Diameter: 0.3850
- Barrel or Shank Style: Straight Shank
from ifm efector inc.
Reliable protection against aggressive media and high flow velocities. Allows the replacement of the temperature sensor in a running process. High pressure resistance. Robust stainless steel housing for the requirements of harsh industrial environments. Learn more. From May 1st 2025, products... [See More]
- Material of Construction: Stainless Steel
- Connection Means: Socket-weld or Weld-in
- Socket/Stem Insertion Length: 6.81
from Pyromation
Sanitary, Weld-In Thermowells are offered in 304 and 316 stainless steel. They are available in a variety of lengths, process connection sizes, and optional lagging extensions. The thermowell is to be welded into a tank or vat with a full crevice free fillet-weld to prevent corrosion, bacteria... [See More]
- Material of Construction: Stainless Steel
- Connection Means: Socket-weld or Weld-in
- Bore Diameter: 0.2600
- Barrel or Shank Style: Tapered Shank
from Tempco Electric Heater Corporation
Series 35 Straight Shank — Lagging Extension Type with .385" Bore for 3/8" Diameter Elements. Standard Duty Threaded. Thermowells are available in the following materials: Steel. Brass. 316 Stainless Steel. 304 Stainless Steel. Monel. [See More]
- Material of Construction: Brass; Monel; Stainless Steel; Other Material (Steel)
- Connection Means: Threaded
- Bore Diameter: 0.3850
- Barrel or Shank Style: Straight Shank
from Tempco Electric Heater Corporation
Series 40 Tapered Shank with .385" Bore for 3/8" Diameter Elements. Heavy Duty Threaded. Thermowells are available in the following materials: Steel. Brass. 316 Stainless Steel. 304 Stainless Steel. Monel. [See More]
- Material of Construction: Brass; Monel; Stainless Steel; Other Material (Steel)
- Connection Means: Threaded
- Bore Diameter: 0.3850
- Barrel or Shank Style: Tapered Shank
from Tempco Electric Heater Corporation
Series 50 (.260" Bore ) for 1/4" and 3/8" Diameter Elements. Flanged. Thermowells are available in the following materials: Steel. Brass. 316 Stainless Steel. 304 Stainless Steel. Monel. [See More]
- Material of Construction: Brass; Monel; Stainless Steel; Other Material (Steel)
- Connection Means: Flanged
- Bore Diameter: 0.2600
- Barrel or Shank Style: Straight Shank
from Tempco Electric Heater Corporation
Series 55 (.385" Bore) for 1/4" and 3/8" Diameter Elements. Flanged. Thermowells are available in the following materials: Steel. Brass. 316 Stainless Steel. 304 Stainless Steel. Monel. [See More]
- Material of Construction: Brass; Monel; Stainless Steel; Other Material (Steel)
- Connection Means: Flanged
- Bore Diameter: 0.3850
- Barrel or Shank Style: Straight Shank
from ifm electronic gmbh
Reliable protection against aggressive media and high flow velocities. Allows the replacement of the temperature sensor in a running process. High pressure rating. Simple process connection via adapter. Robust stainless steel housing for the requirements of harsh industrial environments [See More]
- Material of Construction: Stainless Steel
- Socket/Stem Insertion Length: 3.27
- Stem Length: 3.74
- Connection Means: Threaded
from OMEGA Engineering, Inc.
OMEGA ® Miniature and Standard Protection Tubes are available in 316 stainless steel and Inconel 600 nickel alloy. Tubes are available either open at both ends or with one end closed. Standard length available from stock is 6 inches; however, practically any length tube is available on short... [See More]
- Material of Construction: Hastelloy B&C; Stainless Steel
- Barrel or Shank Style: Straight Shank
- Stem Length: 6
from Process Technology
Secures and protects temperature control sensors in tanks. SPECIFICATIONS. Materials: Quartz, 304 Stainless Steel, 316 Stainless Steel, Titanium, Fluoropolymer. Capacities: OVER THE SIDE MODELS: ½ inch diameter tubing with mounting flange standard. THREADED MODELS: ½ inch MNPT... [See More]
- Material of Construction: Stainless Steel; Titanium; Other Material (Fluoropolymer)
- Bore Diameter: 0.5000
- Stem Length: 12 to 36
- Barrel or Shank Style: Straight Shank
from Thermometrics Corporation
Threaded Thermowells are used to provide an isolation between a temperature sensor and the environment, either liquid or gas. [See More]
- Material of Construction: Brass; Carbon Steel; Monel; Stainless Steel
- Connection Means: Threaded
from Winters Instruments
Description & Features: • Available in a wide range of materials for use on most applications • Standard "stepped construction" offering is complemented by an array of custom thermowells including: straight, tapered, sanitary and flanged configurations • 1 year... [See More]
- Material of Construction: Stainless Steel; Other Material (304SS)
- Socket/Stem Insertion Length: 10.47
- Stem Length: 12
- Bore Diameter: 0.2600
from Galco Industrial Electronics
300mm (12in.) 304 SS well, 1 piece [See More]
- Material of Construction: Stainless Steel
from PR electronics
Technical characteristics. Stainless, acid-proof steel W no. 1.4571 / AISI 316TI. Order details. 7440A. 50 mm immersion length. 7440B. 100 mm immersion length. 7440C. 150 mm immersion length. 7440D. 200 mm immersion length. 7440E. 300 mm immersion length [See More]
- Material of Construction: Stainless Steel
- Socket/Stem Insertion Length: 1.97 to 11.81
from KOBOLD Instruments, Inc.
Product Features. NPT Threaded or Weld-On Version. 304 Stainless Steel Standard, Other Materials on Request. Allows for Rotation of Thermometer Indicator. Maximum Pressure 360 PSIG. For Use with TNS, TNF and DTM Series Thermometers. Thermometer thermowells are made of thermally conductive material... [See More]
- Material of Construction: Stainless Steel
- Thread Options: 1/2" NPT; 3/4" NPT; 1" NPT
- Connection Means: Socket-weld or Weld-in; Threaded
from Belimo Americas
Thermowell pocket, 2 ” [50 mm], Stainless steel (fabricated) [See More]
- Material of Construction: Stainless Steel
- Stem Length: 2
from Chromalox
Protects Thermostat Sensors in Suitable Corrosive Applications. Seals Sensor Inserted Through a Tank, Pipe or Duct Wall [See More]
- Material of Construction: Brass; Carbon Steel; Stainless Steel
- Connection Means: Threaded
- Coatings: Teflon--coated (optional feature)
- Thread Options: 1/2" NPT; 3/4" NPT
from Acrolab Ltd.
Acrolab Ltd is a thermal engineering solutions company and this year marks our 70th year as a custom solutions provider for various industrial manufacturers from high-end consumer and defense electronics to plastics, rubber, and composite processors in all areas of manufacturing. Acrolab ’s... [See More]
- Material of Construction: Brass; Carbon Steel; Monel; Stainless Steel; Other Material
- Socket/Stem Insertion Length: 4 to 22
- Stem Length: 6 to 24
- Bore Diameter: 0.2600 to 0.3850
from Minco
Protect probes from pressure, flow, and corrosive fluids. Thermowells on this page are machined from solid bar stock. Specify reduced tip style for fast response, tapered style for maximum rigidity in hig h flow conditions. Immerse the thermowell at least 2.5" (65 mm) for accurate readings. The well... [See More]
- Material of Construction: Stainless Steel
- Connection Means: Threaded
- Bore Diameter: 0.2600
- Thread Options: 1/2" NPT
from Ultra Energy
Threaded Thermowell, Industrial Temperature Accessory, Thermowell [See More]
- Material of Construction: Stainless Steel
- Connection Means: Threaded
- Bore Diameter: 0.2600 to 0.3850
- Thread Options: 1/2" NPT (optional feature); 3/4" NPT (optional feature)
from ifm electronic gmbh
Reliable protection against aggressive media and high flow velocities. Allows the replacement of the temperature sensor in a running process. High pressure rating. Simple process connection via adapter. Robust stainless steel housing for the requirements of harsh industrial environments [See More]
- Material of Construction: Stainless Steel
- Socket/Stem Insertion Length: 10.79
- Stem Length: 11.81
- Connection Means: Threaded
from OMEGA Engineering, Inc.
Sanitary Thermowells are generally chosen for an application based on corrosion conditions, surface finish, mechanical size requirements, and accurate thermal transfer. Omega Sanitary Thermowells can be configured from the options below to meet your clean in place or sanitize in place application... [See More]
- Material of Construction: Stainless Steel
- Socket/Stem Insertion Length: 1.62 to 10.5
- Stem Length: 2.5 to 12
- Bore Diameter: 0.2600 to 0.3850
from Winters Instruments
Description & Features: • Designed for use on a closed system • 1 year warrantyApplications: • Isolates temperature sensor from process media [See More]
- Material of Construction: Stainless Steel; Other Material (304SS)
- Socket/Stem Insertion Length: 2
- Stem Length: 4
- Bore Diameter: 0.2600
from Chromalox
With 2 or 3" Lagging Extensions. Standard Threaded Well for 1/4" Diameter Elements. 1/2 and 3/4" NPT Standard. Additional Thread Sizes are Available on Request. Standard Well Materials: 304 SS, 316 SS, Carbon Steel and Brass. PFA Teflon ® Coated Thermowells are Available. For Companion Probe See... [See More]
- Material of Construction: Brass; Carbon Steel; Stainless Steel
- Bore Diameter: 0.2600
- Socket/Stem Insertion Length: 2.5 to 19.5
- Coatings: Teflon--coated (optional feature)
from Acrolab Ltd.
Acrolab Ltd is a thermal engineering solutions company and this year marks our 70th year as a custom solutions provider for various industrial manufacturers from high-end consumer and defense electronics to plastics, rubber, and composite processors in all areas of manufacturing. Acrolab ’s... [See More]
- Material of Construction: Brass; Carbon Steel; Monel; Stainless Steel; Other Material
- Socket/Stem Insertion Length: 4 to 22
- Stem Length: 6 to 24
- Bore Diameter: 0.2600 to 0.3850
from Minco
Protect probes from pressure, flow, and corrosive fluids. Thermowells on this page are machined from solid bar stock. Specify reduced tip style for fast response, tapered style for maximum rigidity in hig h flow conditions. Immerse the thermowell at least 2.5" (65 mm) for accurate readings. The well... [See More]
- Material of Construction: Stainless Steel
- Connection Means: Threaded
- Bore Diameter: 0.2600
- Thread Options: 3/4" NPT
from OMEGA Engineering, Inc.
Standard Threaded Wells [See More]
- Material of Construction: Stainless Steel
- Bore Diameter: 0.2756 to 0.3543
- Socket/Stem Insertion Length: 2.5 to 10.5
- Connection Means: Threaded
from Winters Instruments
Description & Features: • Designed to be welded in place within the system • 1 year warrantyApplications: • Slow velocity (i.e. a feed water system on a boiler) [See More]
- Material of Construction: Stainless Steel; Other Material (304SS)
- Socket/Stem Insertion Length: 2.5
- Stem Length: 4
- Bore Diameter: 0.2600
from Acrolab Ltd.
Acrolab Ltd is a thermal engineering solutions company and this year marks our 70th year as a custom solutions provider for various industrial manufacturers from high-end consumer and defense electronics to plastics, rubber, and composite processors in all areas of manufacturing. Acrolab ’s... [See More]
- Material of Construction: Brass; Carbon Steel; Monel; Stainless Steel; Other Material
- Socket/Stem Insertion Length: 2.5 to 22.5
- Stem Length: 4 to 24
- Bore Diameter: 0.2600 to 0.3850
from OMEGA Engineering, Inc.
Van Stone Thermowells [See More]
- Material of Construction: Stainless Steel
- Socket/Stem Insertion Length: 2 to 22
- Stem Length: 4 to 24
- Bore Diameter: 0.2600 to 0.3850
from Winters Instruments
Description & Features: • Utilized anywhere a welded thermowell is required • 1 year warrantyApplications: • High pressure and/or high vibration [See More]
- Material of Construction: Stainless Steel; Other Material (304SS)
- Socket/Stem Insertion Length: 2.5
- Stem Length: 4
- Bore Diameter: 0.2600
from Acrolab Ltd.
Acrolab Ltd is a thermal engineering solutions company and this year marks our 70th year as a custom solutions provider for various industrial manufacturers from high-end consumer and defense electronics to plastics, rubber, and composite processors in all areas of manufacturing. Acrolab ’s... [See More]
- Material of Construction: Brass; Carbon Steel; Monel; Stainless Steel; Other Material
- Socket/Stem Insertion Length: 2.5 to 22.5
- Stem Length: 4 to 24
- Bore Diameter: 0.2600 to 0.3850
from Acrolab Ltd.
Acrolab Ltd is a thermal engineering solutions company and this year marks our 70th year as a custom solutions provider for various industrial manufacturers from high-end consumer and defense electronics to plastics, rubber, and composite processors in all areas of manufacturing. Acrolab ’s... [See More]
- Material of Construction: Brass; Carbon Steel; Monel; Stainless Steel; Other Material
- Socket/Stem Insertion Length: 2.5 to 22.5
- Stem Length: 4 to 24
- Bore Diameter: 0.2600 to 0.3850
from Acrolab Ltd.
Acrolab Ltd is a thermal engineering solutions company and this year marks our 70th year as a custom solutions provider for various industrial manufacturers from high-end consumer and defense electronics to plastics, rubber, and composite processors in all areas of manufacturing. Acrolab ’s... [See More]
- Material of Construction: Brass; Carbon Steel; Monel; Stainless Steel; Other Material
- Socket/Stem Insertion Length: 2.5 to 22.5
- Stem Length: 4 to 24
- Bore Diameter: 0.2600 to 0.3850