Welded thermowells, root and threaded sleeves

Welded wells (without cooling neck and connection head) are available according to this table:

Product number	Type	For sensing element diameter/length [mm]	Inner thread	L [mm]	La [mm]	Da [mm]	Lb [mm]	Db [mm]
1025318	E-6/30	3/120
1025319	E-6/55	3/145
1090956	E-6/115	3/205
911966	D1-L	6/315	M18×1,5	140	50	24h7	65	12,5
911144	D4-L	6/375	M18×1,5	200	110	24h7	65	12,5
911968	D5-L	6/435	M18×1,5	260	110	24h7	125	12,5
911907	D1-M	6/315	M18×1,5	140	50	24h7	65	12,5
911165	D4-M	6/375	M18×1,5	200	110	24h7	65	12,5
911457	D5-M	6/435	M18×1,5	260	110	24h7	125	12,5
911890	D1-K	6/315	M18×1,5	140	50	24h7	65	12,5
911161	D4-K	6/375	M18×1,5	200	110	24h7	65	12,5
911967	D5-K	6/435	M18×1,5	260	110	24h7	125	12,5
911906	D1-O	6/315	M18×1,5	140	50	24h7	65	12,5
911145	D4-O	6/375	M18×1,5	200	110	24h7	65	12,5
911969	D5-O	6/435	M18×1,5	260	110	24h7	125	12,5
912066	D1S-L	3/315	M14×1,5	140	50	18h7	65	9
911164	D4S-L	3/375	M14×1,5	200	110	18h7	65	9
912067	D1S-M	3/315	M14×1,5	140	50	18h7	65	9
911166	D4S-M	3/375	M14×1,5	200	110	18h7	65	9
912065	D1S-K	3/315	M14×1,5	140	50	18h7	65	9
911162	D4S-K	3/375	M14×1,5	200	110	18h7	65	9
912068	D1S-O	3/315	M14×1,5	140	50	18h7	65	9
911163	D4S-O	3/375	M14×1,5	200	110	18h7	65	9

Other sizes and materials are quoted upon request.

If the process already has a welded thermowell, a suitable cooling neck and connection head can be purchased as a separate component. Cooling necks have outer threads which can be applied to D-wells:

• M14×1,5 for D1S and D4S
• M18×1,5 for D1, D4 and D5.

Cooling necks and connection heads, as components (without wells, without sensing elements):

Product nunber	Type	For well types
915312	H-12-D/H-165/M18X1,5	D1, D4 and D5
915313	H-12-D/H-165/M14X1,5	D1S and D4S

A cooling neck, and connection head equipped with a sensing element - without a welded thermowell - is presented on datasheet 5.
A cooling neck, and connection head equipped with a sensing element and with a welded well is presented on datasheet 4.

The root sleeve is first welded on the process pipe or container, and then bored to precise inner dimensions. After that the D1S/D4/D4S/D5 type thermowell is welded on the root sleeve. The root sleeve material needs to be the same as the welded thermowell. Welded root sleeves, as components:

Product number	Type	For well type
1025309	18-K	D1S and D4S
1025312	18-L	D1S and D4S
1025313	18-M	D1S and D4S
918138	18-O	D1S and D4S
912333	24-K	D1, D4 and D5
912331	24-L	D1, D4 and D5
912332	24-M	D1, D4 and D5
912334	24-O	D1, D4 and D5

Other materials and sizes are quoted upon request. Complete RTD and TC sensors with welded wells (D1...D5) are presented on Datasheet 4.

A threaded sleeve is first welded on the process pipe or container, and then the threaded thermowell is installed to the sleeve. As standard, the threaded sleeve material is acid-proof AISI 316L. Welded threaded sleeves available are:

Product number	Type and inner thread	Overall length [mm]
1025314	G1/2”	L=30
1002689	G1/2”	L=70
1003144	G1/2”	L=100
1028394	G1”	L=70

Other materials and sizes are quoted upon request.