Thermometer Wells | McMaster-Carr

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Thermowell Connection Pipe Size

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For Thermometer Stem Diameter

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For Thermometer Stem Length

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DFARS Compliance

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REACH Compliance

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Thermowell Material

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Stem Length

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309 Products

Temperature and Humidity Monitoring

Thermowells

Protect thermometers and temperature probes from pressure, vibration, shock, and corrosion in tanks and pipelines. These thermowells isolate the contents of your process, so you can replace temperature sensors without stopping flow or draining the system.

Heavy Duty Thermowells

Thick walls and a tapered shank shield thermometers and temperature probes from higher pressure and flow than other thermowells.

Thermowells for Insulated Tanks

The extra-long nut on these thermowells lets you install thermometers and temperature probes through thick insulation.

Food and Beverage Thermowells with
Sanitary Quick-Clamp Connection

Isolate thermometers and temperature probes from the contents of dairy and food-processing equipment with these 3-A certified thermowells that have a sanitary quick-clamp connection for easy removal.

Weld-In Thermowells

To protect thermometers and temperature probes in steam lines and other high-temperature and high-pressure applications, these thermowells weld into place for a more secure connection than threaded thermowells.

Thermocouple and RTD Protection Tubes

Designed for use with thermocouples and RTDs in large, nonpressurized tanks, these protection tubes are available in long lengths at a lower cost than thermowells.

Heavy Duty Threaded
Thermometers with Thermowell

A thermowell covers the thermometer stem for protection from vibration, corrosion, shock, and pressure.

Adjustable-Angle Quick-Response
Threaded Thermometers

Obtain the best viewing angle and a fast response time with these pivoting thermometers filled with mercury-free fluid that registers temperature changes more quickly than dial thermometer stems.

Heavy Duty Quick-Response Threaded
Thermometers with Thermowell

The detachable brass thermowell covers the thermometer stem to protect it from vibration, corrosion, shock, and pressure.

Adjustable-Angle Solar-Powered
Threaded Thermometers

Since these thermometers operate on indoor light, there’s no need for batteries. They pivot 180° to support angled mounting.

Threaded RTD Probes with
Thermowell for Liquids and Gases

To protect the probe from vibration, corrosion, and shock, these RTD probes come with a thermowell.

Threaded Thermocouple Probes with
Thermowell for Liquids and Gases

The included thermowell protects the probe from vibration, corrosion, and shock in tanks and pipelines.

Threaded Thermocouple Probe Transmitters
with Thermowell for Liquids and Gases

Measure the temperature of liquids and gases without damaging the probe on these transmitters. An included thermowell shields the probe from vibration, corrosion, and shocks in tanks and pipes.

Temperature and Humidity Monitoring

Thermowells

Heavy Duty Thermowells

Thermowells for Insulated Tanks

Food and Beverage Thermowells withSanitary Quick-Clamp Connection

Weld-In Thermowells

Thermocouple and RTD Protection Tubes

Heavy Duty ThreadedThermometers with Thermowell

Adjustable-Angle Quick-ResponseThreaded Thermometers

Heavy Duty Quick-Response ThreadedThermometers with Thermowell

Adjustable-Angle Solar-PoweredThreaded Thermometers

Threaded RTD Probes withThermowell for Liquids and Gases

Threaded Thermocouple Probes withThermowell for Liquids and Gases

Threaded Thermocouple Probe Transmitterswith Thermowell for Liquids and Gases