Thermowells

Emerson's Rosemount Thermowell portfolio consists of highly reliable thermowells of various process connections, styles, and materials engineered to protect temperature sensors in a wide variety of applications and process conditions. Utilize our Rosemount Thermowell Design Accelerator for easy thermowell sizing and selection and to ensure your thermowells comply with standards and are optimized for either accuracy or inventory purposes.

Thermowells Overview

Thermowells (1) are closed-end metal tubes installed pressure-tight into process vessels or piping, protecting temperature sensors (2) from harsh industrial process conditions, such as flow-induced stress, high pressure and corrosive chemicals. Additionally, thermowells allow the sensor to be easily removed from the process for calibration or replacement without requiring a process shutdown. Based on the stem profile, you can optimize your thermowells for response time or robustness. For the most accurate temperature measurement, size your thermowell to place the tip in the center of the pipe.

Thermowell Overview Diagram Image with Sensor

Welded (1):

Used for high flow rates, pressures and temperatures

Flanged (2):

Used for high pressure/high flow rate processes

Threaded (3):

Most common, easiest installation, threaded into port on process

Van Stone (4):

Two-piece design, ideal for corrosive applications requiring exotic metal thermowells

Stepped (1):

Best thermal response time
Least robust profile
Produces lowest drag force

Tapered (2):

Good thermal response time
Good strength
Produces high drag force

Straight (3):

Slowest thermal response time
Most robust profile
Produces highest drag force

Twisted (4):

Patented Rosemount design
Used in high velocity and high accuracy control applications
Most robust thermowell design that allows for proper stem immersion in the pipe
Best results when it comes to suppressing harmful vortex shedding induced vibrations

Thermowell Solutions

A robust and versatile thermowell family. Precision manufactured in a wide variety of mounting styles, process connections, and materials for adaptability and compatibility.

Design flexibility allows you to modify the thermowell profile to fit exact needs
Large variety of standardized thermowell tests and certificates for traceability and safety
Access to thermowell calculation tool (according to ASME PTC 19.3TW) to ensure thermowell is safe in selected process condition

Learn More

A New Twist on Thermowell Design.

Eliminates over 90% of dynamic stress on the thermowell
Decrease engineering time by removing the need to perform wake frequency calculations
Increase safety by greatly reducing the risk of thermowell failures with changing process conditions (start-up, shutdown, events)

See the Thermowell Comparison Video for an inside look at the benefits of using a Rosemount Twisted Square Thermowell.

Learn More

Typically used in the chemical and pharmaceutical industries and designed to allow for a fast time response or for applications where long immersion lengths are needed.

Threaded and flanged mounting styles with stem profile options allow for application flexibility
Special testing options to meet process requirements, including external and internal hydrostatic pressure testing and dye penetration

Learn More

Media & Case Studies

Thermowell Comparison Video

Thermowell Calculation White Paper

Twisted Square Technical Paper

Thermowell Calculation Tools

Temperature Engineer's Guide

Guide to help you reduce cost and improve temperature performance by selecting the right solution.

Thermowell Design Accelerator

Perform thermowell design calculations per ASME PTC 19.3TW

Temperature Model Code Converter

Convert legacy model numbers to the Rosemount 114C Thermowell and 214C Temperature Sensor.

Services & Consulting

Lifecycle Services

Maximize plant operating performance from start-up to shutdown with Emerson service technicians.

Project Services

Partner with project management experts on Rosemount product details and reduce project complexity.

Educational Services

CEU-certified standard and customized training for specifications, commissioning, and operations.

Thermowells

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An error occurred in template HttpError.unresolvablePlacement.ftl for Content with ID No placement found for name 'below'.
Show Details

View:

FreemarkerView[template=/jar:id:contentproperty:/Themes/emerson/templates/emerson-templates.jar/archive!/META-INF/resources/WEB-INF/templates/emerson/com.coremedia.objectserver.web/HttpError.unresolvablePlacement.ftl]

Model:

com.coremedia.objectserver.web.HttpError[code=404, message=No placement found for name 'below']

Cause:

Error rendering view
The following has evaluated to null or missing:
==> lc.fragmentHighlightingMetaData  [in template "jar:id:contentproperty:/Themes/emerson/templates/emerson-templates.jar/archive!/META-INF/resources/WEB-INF/templates/emerson/com.coremedia.objectserver.web/HttpError.unresolvablePlacement.ftl" at line 4, column 31]

----
Tip: It's the step after the last dot that caused this error, not those before it.
----
Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
----

----
FTL stack trace ("~" means nesting-related):
	- Failed at: @preview.metadata data=[lc.fragmentHi...  [in template "jar:id:contentproperty:/Themes/emerson/templates/emerson-templates.jar/archive!/META-INF/resources/WEB-INF/templates/emerson/com.coremedia.objectserver.web/HttpError.unresolvablePlacement.ftl" at line 4, column 6]
----

Class Hierarchy:

          com.coremedia.objectserver.web.HttpError
          java.lang.Object

Full Stack Trace:

com.coremedia.objectserver.view.ViewException: Error rendering view
	at com.coremedia.objectserver.view.ViewUtils.rethrow(ViewUtils.java:344)
	at com.coremedia.objectserver.view.freemarker.FreemarkerViewEngine$FreemarkerView.render(FreemarkerViewEngine.java:154)
	at com.coremedia.objectserver.view.freemarker.FreemarkerViewEngine$FreemarkerView.render(FreemarkerViewEngine.java:122)
	at com.coremedia.objectserver.view.ExceptionHandlingViewDecorator$ExceptionDecorator.decorate(ExceptionHandlingViewDecorator.java:113)
	at com.coremedia.objectserver.view.ViewDecoratorBase$DecoratingBaseView.render(ViewDecoratorBase.java:334)
	at com.coremedia.objectserver.view.ViewDecoratorBase$DecoratingServletAndTextView.render(ViewDecoratorBase.java:422)
	at com.coremedia.objectserver.view.ViewDecoratorBase$DecoratingBaseView.render(ViewDecoratorBase.java:336)
	at com.coremedia.objectserver.view.ViewDecoratorBase$DecoratingServletAndTextView.render(ViewDecoratorBase.java:422)
	at com.coremedia.objectserver.view.ViewDecoratorBase$DecoratingBaseView.render(ViewDecoratorBase.java:336)
	at com.coremedia.objectserver.view.ViewDecoratorBase$DecoratingServletAndTextView.render(ViewDecoratorBase.java:422)
	at com.coremedia.objectserver.view.ExceptionHandlingViewDecorator$ExceptionDecorator.decorate(ExceptionHandlingViewDecorator.java:113)
	at com.coremedia.objectserver.view.ViewDecoratorBase$DecoratingBaseView.render(ViewDecoratorBase.java:334)
	at com.coremedia.objectserver.view.ViewDecoratorBase$DecoratingServletAndTextView.render(ViewDecoratorBase.java:422)
	at com.coremedia.objectserver.view.ViewUtils.render(ViewUtils.java:152)
	at com.coremedia.objectserver.view.ViewUtils.render(ViewUtils.java:109)
	at com.coremedia.objectserver.view.BeanView.renderMergedOutputModel(BeanView.java:63)
	at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:316)
	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1401)
	at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1145)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1084)
	at com.coremedia.objectserver.web.DispatcherServlet.doDispatch(DispatcherServlet.java:69)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:655)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at com.coremedia.livecontext.fragment.FragmentContextProvider.doFilter(FragmentContextProvider.java:71)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at com.coremedia.blueprint.cae.filter.PreviewViewFilter.doFilterInternal(PreviewViewFilter.java:48)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.springframework.web.filter.AbstractRequestLoggingFilter.doFilterInternal(AbstractRequestLoggingFilter.java:289)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at com.coremedia.blueprint.cae.filter.SiteFilter.doFilter(SiteFilter.java:54)
	at com.emerson.globalization.web.filter.VirtualSiteFilter.doFilter(VirtualSiteFilter.java:40)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at com.coremedia.livecontext.preview.PreviewMarkerFilter.doFilter(PreviewMarkerFilter.java:35)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at com.coremedia.blueprint.livecontext.ecommerce.filter.CommerceConnectionFilter.doFilter(CommerceConnectionFilter.java:44)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at com.coremedia.blueprint.cae.filter.SiteFilter.doFilter(SiteFilter.java:54)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:327)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:122)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:116)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:126)
	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:81)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:109)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:149)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:103)
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:89)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:117)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.header.HeaderWriterFilter.doHeadersAfter(HeaderWriterFilter.java:90)
	at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:75)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:110)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:80)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:55)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:211)
	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:183)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:354)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:267)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at com.emerson.blueprint.component.cae.csrf.CsrfLegacyTokenGetterFilter.doFilterInternal(CsrfLegacyTokenGetterFilter.java:19)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:96)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at com.coremedia.blueprint.cae.filter.RequestRejectedExceptionFilter.doFilter(RequestRejectedExceptionFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
	at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:769)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1787)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: freemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> lc.fragmentHighlightingMetaData  [in template "jar:id:contentproperty:/Themes/emerson/templates/emerson-templates.jar/archive!/META-INF/resources/WEB-INF/templates/emerson/com.coremedia.objectserver.web/HttpError.unresolvablePlacement.ftl" at line 4, column 31]

----
Tip: It's the step after the last dot that caused this error, not those before it.
----
Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
----

----
FTL stack trace ("~" means nesting-related):
	- Failed at: @preview.metadata data=[lc.fragmentHi...  [in template "jar:id:contentproperty:/Themes/emerson/templates/emerson-templates.jar/archive!/META-INF/resources/WEB-INF/templates/emerson/com.coremedia.objectserver.web/HttpError.unresolvablePlacement.ftl" at line 4, column 6]
----
	at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134)
	at freemarker.core.UnexpectedTypeException.newDescriptionBuilder(UnexpectedTypeException.java:85)
	at freemarker.core.UnexpectedTypeException.<init>(UnexpectedTypeException.java:63)
	at freemarker.core.NonMethodException.<init>(NonMethodException.java:74)
	at freemarker.core.MethodCall._eval(MethodCall.java:67)
	at freemarker.core.Expression.eval(Expression.java:101)
	at freemarker.core.DefaultToExpression._eval(DefaultToExpression.java:96)
	at freemarker.core.Expression.eval(Expression.java:101)
	at freemarker.core.ListLiteral._eval(ListLiteral.java:49)
	at freemarker.core.Expression.eval(Expression.java:101)
	at freemarker.core.Environment.setMacroContextLocalsFromArguments(Environment.java:1025)
	at freemarker.core.Environment.invokeMacroOrFunctionCommonPart(Environment.java:871)
	at freemarker.core.Environment.invokeMacro(Environment.java:825)
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:84)
	at freemarker.core.Environment.visit(Environment.java:347)
	at freemarker.core.Environment.visit(Environment.java:353)
	at freemarker.core.Environment.visit(Environment.java:353)
	at freemarker.core.Environment.process(Environment.java:326)
	at com.coremedia.objectserver.view.freemarker.FreemarkerViewEngine$FreemarkerView.render(FreemarkerViewEngine.java:150)
	... 130 more