Thermowell Selection Guide: 316 Stainless Steel Solutions for Accurate Temperature Measurement

Understanding Thermowells: Protection and Functionality

A thermowell serves two primary functions in industrial temperature measurement systems. First, it protects the thermometer or temperature transmitter's stem, insertion probe, and sensor from harsh process conditions. Second, it acts as a plug to prevent liquid leakage when replacing or servicing the thermometer or temperature transmitter without shutting down the process.

Material Options

Thermowells can be manufactured from various materials including steel, stainless steel, brass, Monel, or Inconel. Angstrom offers 316 stainless steel thermowells as our standard option, providing excellent corrosion resistance and durability for most industrial applications.

Proper Insertion Length Selection

The thermowell insertion length should be a maximum of 1/2 of the pipe diameter. For example, if your pipe is 8" (200mm) in diameter, the thermowell length should be 4" (100mm). At Angstrom, our insertion length measurements include the male thread connection. For instance, a 100mm thermowell includes the thread connection in this measurement.

Standard Stem Lengths Available

Angstrom offers the following standard stem lengths:

• 2.5" (63mm)
• 4" (100mm)
• 6" (150mm)
• 8" (200mm)
• 10" (250mm)
• 12" (300mm)

Compatibility and Specifications

Angstrom thermowells are compatible with both bimetal and V-shape thermometers. Our standard specifications include:

• Bore size: 10.5mm (internal diameter)
• Stem outer diameter: 12mm
• Connection: Female 1/2" NPT and Male 1/2" NPT as standard
• Note: Flanged connections are not available