Application
Thermowells are used to protect temperature measurement instrumentation from damage, corrosion and excessive pressure. Our products can be made of stainless steel, brass, hastelloy, monel, Inconel and so on. We manufacture threaded, flanged, socket weld thermowells, metal protection tubes, sample probes and test wells. They can be utilized with thermocouples, thermometers, resistance temperature detectors (RTDs) and other instrumentation devices.
WHM thermowells are designed and manufactured in compliance with the following standards, your custom designs are also accepted.
- ASME PTC 19.3 TW-2016 thermowells
- IEC 61520 (GB/T 19901) metal thermowells for thermometer sensors- functional dimensions
For assistance, please contact Shanghai Wan Hui Machinery through E-mail info@whmcn.com or call us at +86-21-6892 4569.


WHM Standard Features

Shank Configuration

Shank Style | Code |
Straight | ST |
Tapered | TP |
Step Down | SD |
Limited Space | LS |
Threaded thermowell is machined from a single piece of solid bar stock.
Description | Immersion Length U |
Process Connection NPT P |
Instrument Connection NPT I |
Bore Dia. d |
Shank Dia. Q(V) |
Size Range | 1.5” 2” 3” 4” 5” 6” 7” 8” |
1/2” 3/4” 1” 1 1/4” |
1/4” 1/2” 3/4” 1” 1 1/4” |
0.260” 0.335” 0.385” 0.515” 0.718” |
1/2” 5/8” 3/4” 7/8” 1” |
T=0(standard)
Your special designs can be customized.
Please contact us via E-mail info@whmcn.com
Flanged thermowell is machined from a single piece of solid bar stock welded to a flange.
Description | Immersion Length U |
Flanged Only | Instrument Connection NPT I |
Bore Dia. d |
Shank Dia. Q(V) |
Size Range | 1.5” 2” 3” 4” 5” 6” 7” 8” |
1” - 150# 1-1/2” - 150# 2” - 150# 1” - 300# 1-1/2” - 300# 2” - 300# 1” - 600# 1-1/2” ANSI 600# 2” ANSI 600# 1” ANSI 900/1500# 1-1/2” ANSI 900/1500# 2” ANSI 900/1500# |
1/4” 1/2” 3/4” 1” |
0.260” 0.335” 0.385” 0.515” 0.718” |
1/2” 5/8” 3/4” 7/8” |
T=0(standard)
Your special designs can be customized.
Please contact us via E-mail info@whmcn.com.
Socket weld thermowell is constructed from a single piece of solid bar stock. It is used for field welding and permanent installation.
Description | Immersion Length U |
Socket Weld & Weld-in | Instrument Connection NPT I |
Bore Dia. d |
Shank Dia. Q(V) |
Size Range | 1.5” 2” 3” 4” 5” 6” 7” 8” |
3/4” pipe (1.050 O.D.) 1” pipe (1.315 O.D.) 1-1/4” pipe (1.660 O.D.) 1-1/2” pipe (1.900 O.D.) 1-1/2” Actual (1.500 O.D.) |
1/4” 1/2” 3/4” 1” 1-1/4” |
0.260” 0.335” 0.385” 0.515” 0.718” |
1/2” 5/8” 3/4” 7/8” 1” |
T=0(standard)
Your special designs can be customized.
Please contact us via E-mail info@whmcn.com.
Protection Tubes are constructed from metal and can be built with either threaded or flanged connection types.
Description | Immersion Length U |
Process Connection NPT P |
Pipe O.D. | Head Length H | Instrument Connection NPT/NPSM I |
Bore Dia. d |
Shank Dia. Q(V) |
Size Range | 2” 3” 6” 8” 10” 12” 15” 18” 21” 24” 27” 30” 32” 36” 38” 40” |
3/4NPT 1NPT 1-1/2NPT Welded 1” ANSI150# 1 1/2” ANSI150# 2” ANSI150# 3” ANSI150# 4” ANSI150# 1” ANSI300# 1 1/2” ANSI300# 2” ANSI300# 3” ANSI300# 4” ANSI300# 1” ANSI600# 1 1/2” ANSI600# 2” ANSI600# 3” ANSI600# 4” ANSI600# |
1/4” S40 1/4” S80 1/4” S160 1/2” S40 1/2” S80 1/2” S160 3/4” S40 3/4” S80 3/4” S160 1” S40 1” S40 1” S80 1” S160 |
2” 2.5” 3” 3.5” 4” 4.5” 5” 5.5” 6” 6.5” 7” 7.5” 8” 8.5” 9” 9.5” |
1/4” 1/2” 3/4” |
0.260” 0.385” |
1/2” 5/8” 3/4” 7/8” 1” 1 1/8” |
Your special designs can be customized.
Please contact us via E-mail info@whmcn.com
Sample probes are machined from drilled bar stock with 45 degrees angled tip.
Description | Immersion Length U |
Process Connection NPT P |
Instrument Connection NPT I |
Bore Dia. d |
Shank Dia. Q(V) |
Size Range | 1.5” 2” 3” 4” 5” 6” 7” 8” |
1/2” 3/4” 1” 1-1/4” |
1/4” 1/2” 3/4” 1” 1-1/4” |
0.260” 0.335” 0.385” 0.515” 0.718” |
1/2” 5/8” 3/4” 7/8” 1” |
T=0(standard)
Your special designs can be customized.
Please contact us via E-mail info@whmcn.com
Plug and chains in brass (BP) or stainless (SP) steel are available for internal threaded thermowells.
Description | Immersion Length U |
Process Connection NPT P |
Instrument Connection NPT I |
Bore Dia. d |
Shank Dia. Q(V) |
Size Range | 1.5” 2” 3” 4” 5” 6” 7” 8” |
1/2” 3/4” 1” 1-1/4” |
1/4” 1/2” 3/4” 1” 1-1/4” |
0.260” 0.335” 0.385” 0.515” 0.718” |
1/2” 5/8” 3/4” 7/8” 1” |
T=0(standard)
Your special designs can be customized.
Please contact us via E-mail info@whmcn.com




Product Message