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Swagelok® Thermowells

Protect bimetal thermometers from damage that could result from contact with pressurized, corrosive, flowing, viscous, or abrasive process fluids with Swagelok thermowells.

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Swagelok thermowells enable removal of thermometers for replacement or service without affecting the process or system while also protecting the thermometers from damage that can be caused by process fluids. They can accommodate 2.5 through 12 in. (63.5 through 305 mm) thermometer stem lengths in reduced-, straight-, and tapered-shank configurations.

304 stainless steel construction is standard with 316 stainless steel available for when higher corrosion resistance is needed. Available options include lag extensions for use in insulated piping applications, protective stainless steel cap and chain, and a female G1/2B instrument connection.


Process Connections ASME B16.5 raised-face flange, 3-A-compliant sanitary Kwik-Clamp, threaded (NPT), weld socket
Instrument Connections 1/2 in. NPSM straight pipe thread for mechanical joints standard; G1/2B optional
Size 0.260 in. (6.6 mm) bore; 1/2 through 2 in. process connections

Thermowells Catalogs

Locate detailed product information, including materials of construction, pressure and temperature ratings, options, and accessories.

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Small Footprint, Large Impact: How to Detect and Protect Against Gauge Failures

Learn to recognize the signs of a failing gauge and avoid risk to employees and costly downtime to make repairs.

Learn to Prevent Gauge Failure

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Learn how API 682 guides the design and assembly of mechanical seal support systems and how applying a few best practices can help your systems last longer and work better.

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There are several common fluid systems that successful plant operations depend on, and choosing the right fabrication provider can be highly beneficial if you’re short on resources.

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Process Measurement – Impulse Line Best Practices

It can be difficult to identify issues within your process instrumentation application if you focus solely on the transmitter. Learn how to solve problems within your process instrumentation line with tips and best practices from Swagelok.

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