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Technical Notes
4150 Gen. Purpose Probe
4119 and 4120 Waterproof Probes
4116 and 4126 Spring-Loaded Probes
41000 Series Probes
42000 Series Products
Special Category Probes
Connection Heads
Platinum/Thermocouple Transmitters
Temperature Sensors


We stock type S 304 and 316 stainless steel thermowells with 1/2 and 3/4NPT process threads in 1 1/2", 2 1/2" and 4 1/2" U (insertion length) dimensions. Sizes and materials shown below are representative only. In addition to the standard thermowells, we can provide wells with thin walls- .031" minimum- in U dimensions up to 4 1/2 inches. We can also manufacture protection tubes in various diameters and wall thicknesses.

Threaded and Socket-Weld Part Number Format            3/4-260S-U4 1/2-316SS-BC

Process Connection Size -NPT thread (S) Pipe size (W) ____3/4
Bore Diameter -.260" standard_____________________________260
Type -Screwed (S) Welded (W) Heavy Duty (H) Lagging (L or HL)____S
Insertion Length- U Dimension in inches___________________________U4 1/2
Material- 304SS or 316SS standard_____________________________________316SS
(Optional) Cap and Chain- BC is brass, SC is stainless steel_______________________BC

Threaded thermowells are available with 1/2, 3/4 or 1"NPT process threads.
Socket-weld thermowell body diameters are equivalent to 1/2, 3/4, or 1 inch pipe.
U dimensions longer than 4 1/2 inches are normally stated in 3 inch increments.
Lagging dimension T is 2 inches for U= 2 1/2 inches and 3 inches for longer U dimensions.

Flanged Part Number Format                              260F-U10-1 1/2-150#-RFSR-304SS-SC

Bore Diameter -.260" standard___________________260
Insertion Length- U Dimension________________________U10
Flange Size- 1", 1 1/2", 2", 3" pipe________________________1 1/2
Flange Pressure Rating- 150#, 300#____________________________150#
Face Style- FF = flat- RFSM= raised smooth-RFSR= raised serrated______RFSR
Material- 304SS or 316SS_______________________________________________304SS
(Optional) Cap and Chain- BC is brass, SC is stainless steel_________________________SC


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