Application: Standard Length, 3/8" stem, bimetal thermometers; #20 gage thermocouple elements. Unarmored liquid-in-glass test thermometers. Other temperature-sensing elements having .377 in. maximum diameter.

Connection Size: 1" NPT is standard. Other thread sizes are available upon request.

Materials: Brass (ASTM B-16), Carbon Steel (C-1018), Stainless Steel A.I.S.I. 304 & A.I.S.I. 316, Monel. Wells are also available in special materials; prices on request.

Cap and Chain Options:
For Brass cap, add $4 to price and add suffix “CC (Brass)” to the end of the model number when ordering.
For 304 SS cap, add $7 to the price and add suffix “CC (304SS)” to the end of the model number.

Lagging Extension Type External Thread "P"-1" NPT

All dimensions in inches
* NPSM internal pipe thread will accept both NPT and NPS male threads.

To Order (Specify Model No.) Prices Shown in U.S. Dollars

( ) Material – 304 SS, Carbon Steel, etc.
*When ordering probes with NPT fittings, specify this stem length.

To order, please specify:
1. Complete Model Number
2. Material
3. Cap & Chain–If Desired


Maximum Fluid Velocity—feet per second - Introduction to Thermowells

Well Type	Material	Insertion Length - "U"
		2 1/2	4 1/2	7 1/2	10 1/2	13 1/2	16 1/2	19 1/2	22 1/2
1" - 385H and 1" - 385HL	Brass	321 (150)	129 (83.5)	46.8	23.6	14.5	9.6	6.9	5.1
	Carbon Steel	410 (270)	249 (150)	90.3	45.6	27.8	18.5	13.2	9.8
	A.I.S.I. 304/316	483 (350)	272 (208)	97.3	49.7	30.4	20.3	14.5	10.7
	Monel	396 (300)	214 (167)	77.5	39.2	23.8	16.0	10.3	7.7

Where single values appear in the velocity tables, these may be considered safe for water, steam, air or gas. In the shorter insertion lengths, consideration is given to the velocity pressure effect of water flowing at higher velocities. The values in parentheses, therefore, represent safe values for water flow, while the unbracketed values may be used for steam, air, gas and similar density fluids.