About Selecting Temperature Sensors
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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.
For Thermometer | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Stem Lg. | Stem Dia. | Connection Pipe Size | Connection Thread Type | Connection Gender | Max. Temperature, ° F | Max. Pressure | For Hole Diameter | Nut Length | Insertion Lg. | Each | |
304 Stainless Steel | |||||||||||
2 1/2" | 1/4" | 1/2 | NPT | Male | 1650° | 3400 psi @ 1000° F | 3/4" | 3/4" | 1" | 0000000 | 000000 |
2 1/2" | 1/4" | 1/2 | NPT | Male | 1650° | 3400 psi @ 1000° F | 1" | 3/4" | 1" | 0000000 | 00000 |
4" | 1/4" | 1/2 | NPT | Male | 1650° | 3400 psi @ 1000° F | 3/4" | 3/4" | 2 1/2" | 0000000 | 00000 |
4" | 1/4" | 1/2 | NPT | Male | 1650° | 3400 psi @ 1000° F | 1" | 3/4" | 2 1/2" | 0000000 | 00000 |
6" | 1/4" | 1/2 | NPT | Male | 1650° | 3400 psi @ 1000° F | 3/4" | 3/4" | 4 1/2" | 0000000 | 00000 |
6" | 1/4" | 1/2 | NPT | Male | 1650° | 3400 psi @ 1000° F | 1" | 3/4" | 4 1/2" | 0000000 | 000000 |
9" | 1/4" | 1/2 | NPT | Male | 1650° | 3400 psi @ 1000° F | 3/4" | 3/4" | 7 1/2" | 0000000 | 000000 |
9" | 1/4" | 1/2 | NPT | Male | 1650° | 3400 psi @ 1000° F | 1" | 3/4" | 7 1/2" | 0000000 | 000000 |
316 Stainless Steel | |||||||||||
2 1/2" | 1/4" | 1/2 | NPT | Male | 1700° | 5200 psi @ 1000° F | 3/4" | 3/4" | 1" | 0000000 | 00000 |
4" | 1/4" | 1/2 | NPT | Male | 1700° | 5200 psi @ 1000° F | 3/4" | 3/4" | 2 1/2" | 0000000 | 00000 |
4" | 1/4" | 1/2 | NPT | Male | 1700° | 5200 psi @ 1000° F | 1" | 3/4" | 2 1/2" | 0000000 | 00000 |
6" | 1/4" | 1/2 | NPT | Male | 1700° | 5200 psi @ 1000° F | 3/4" | 3/4" | 4 1/2" | 0000000 | 00000 |
6" | 1/4" | 1/2 | NPT | Male | 1700° | 5200 psi @ 1000° F | 1" | 3/4" | 4 1/2" | 0000000 | 000000 |
9" | 1/4" | 1/2 | NPT | Male | 1700° | 5200 psi @ 1000° F | 3/4" | 3/4" | 7 1/2" | 0000000 | 000000 |
9" | 1/4" | 1/2 | NPT | Male | 1700° | 5200 psi @ 1000° F | 1" | 3/4" | 7 1/2" | 0000000 | 000000 |
Noncontact Temperature Sensors for Tanks
Take your tank’s internal temperature with these sensors that sit on the outside walls. Since they don’t touch your tank’s contents, they won’t cause contamination or corrode. To attach the sensor to your tank, weld the included studs to your tank's walls, or stick them on your tank using adhesive. Either way you mount them, you don’t need to drill or drain your tank, saving you from scheduled downtime.
These sensors are preconfigured for stainless steel tanks with 1/8"-thick walls. They have internal sensors to record the tank’s thermal conductivity, which is used to calculate your tank's internal temperature. The information is sent through a 4-20 mA signal, so you can read the temperature on controllers and data loggers.
Use communication cords (sold separately) to calibrate these sensors on your computer when your tank isn’t the default thickness or material. Download free software and material presets to help you calibrate the sensor. If you know your tank’s thermal conductivity, you can add another material. The software also lets you monitor and log temperature.
For technical drawings and 3-D models, click on a part number.

For Tank | M12 Male Electrical Connection | Mounting Holes | Mounting Slots | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Wall Thick. | Min. Dia., ft. | Temp. Measuring Range, °F | Accuracy, °F | Response Time, sec. | Ht. | Wd. | Dp. | No. of Poles | Coding | Housing Material | Mounting Fasteners Included | No. of | Dia. | No. of | Wd. | Environmental Rating | Each | ||
4-20 mA Output Signal | |||||||||||||||||||
1/8" | 2 | -4° to 212° | ±0.9° | 5 | 4 3/8" | 2 5/8" | 1 5/8" | 8 | A | Nylon Plastic | Yes | 1 | 5/16" | 1 | 5/16" | IP67 | Male | 0000000 | 0000000 |

No. of Poles | USB Standard | Lg., ft. | Max. Current | Operating System Compatibility | Specifications Met | Each | |
M12 Female × USB A Male | |||||||
---|---|---|---|---|---|---|---|
8 | 2.0 | 6 1/2 | 100mA | Windows 10 or Later | CE Marked | 0000000 | 000000 |