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Watlow Style AC Connector MI Thermocouple
Mineral Insulated - Single Element - Plug or Jack Termination

The Watlow Style AC Mineral Insulated Thermocouple temperature sensor "connector" style come with a male plug or female jack connector directly attached to the sheath. Because it is constructed with XACTPAK mineral insulation, the thermocouple is protected from moisture, thermal shock, high temperatures and high pressure.

Achieving specified temperature levels is critical to industrial processes. It's imperative that temperature sensors are designed and manufactured to exacting specifications for accuracy and reliability. Watlow is committed to providing you with the most accurate, high-integrity temperature measurement products possible. Watlow offers the greatest breadth of contact temperature measurement sensors and related components. Whatever your temperature sensing needs, Watlow can provide the optimum configuration, with the accuracy you require.

Performance Capabilities:

  • Watlow MI thermocouples easily handle temperatures up to 1200°C (2200°F).
  • They meet or exceed initial calibration tolerances per ASTM E 230.
  • Diameters as small as 0.010 in (0.25mm)
  • Flexiblity of the XACTPAK material allows you to bend the thermocouple without risk of cracking

To order a Watlow Style AC Single Element Thermocouple build the desired 15-digit model part number using the ordering information form below.

Download Watlow Style AC Thermocouple Catalog Page (pdf)
Custom Ordering Information -
Watlow Style AC Single Element Thermocouples
A C ___ ___ ___ 0 ___ ___ ___ ___ ___ ___ 0 0 0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
To order, make a selection in each category below, enter the quantity needed,
then click the "submit" button at the bottom of the page.
The part number and price will be displayed on the next page.
NOTE: Prices shown are for orders of 5 pieces or more.
There is a higher price for low quantity orders which is shown on next page.
1-2 Construction Style
AC = Mineral insulated plug or jack termination

3. Sheath Diameter (choose B, C, D, E, G, H or J)
Limited Availability - consult yellow chart below for availability with sheath material & calibration type.
B = 0.020 inch diamater
C = 0.032 inch diamater
D = 0.040 inch diamater
E = 0.063 inch diamater
G = 0.125 inch diameter
H = 0.188 inch diameter
J = 0.250 inch diameter

4. Connector Type (choose A, B , C, F, G, H, L, M or N) - please note sheath size availability
A = Standard plug - sheath sizes 0.063 to 0.250
B = Standard jack - sheath sizes 0.063 to 0.250
C = Standard plug with mating connector - sheath sizes 0.063 to 0.250
F = Miniature plug - sheath sizes 0.020 to 0.125
G = Miniature jack - sheath sizes 0.020 to 0.125
H = Miniature plug with mating connector - sheath sizes 0.020 to 0.125

5. Fittings (choose one)- please note sheath size availability
0 = None
A = Fixed single thread 1/8 NPT 303SS - sheath sizes 0.063 to 0.250
B = Fixed single thread 1/4 NPT 303SS - sheath sizes 0.125 to 0.250
D = Fixed single thread 1/2 NPT 303SS - sheath sizes 0.125 to 0.250
F = Fixed double thread 1/2 NPT 303SS - sheath sizes 0.125 to 0.250
G = Adjustable compression TFE Gland 1/8 NPT 303SS - sheath sizes 0.063 to 0.188
H = Adjustable spring loaded double threaded 1/2NPT 316SS - sheath size 0.250
J = Non-adjustable compression 1/8 NPT brass - sheath sizes 0.125 to 0.250
L = Non-adjustable compression 1/8 NPT 303SS - sheath sizes 0.063 to 0.250
Q = Adjustable compression Lava Gland 1/8 NPT 303SS - sheath sizes 0.063 to 0.188
V = Adjustable compression Lava Gland 1/4 NPT 303SS - sheath size 0.250
W = Bayonet lockcap and spring - plated steel - sheath sizes 0.125 to 0.188
X = Adjustable compression TFE Gland 1/4 NPT 303SS - sheath size 0.250
2 = Flat weld pad - 304SS - all sheath sizes
5 = Milled slot weld pad - 304SS - all sheath sizes

6. Unused - Enter "0"
0 = Unused

7. Sheath Material - Limited Availability - consult yellow chart below for availability with sheath diameter & calibration type.
A = 304SS
F = 316SS
Q = Alloy 600

8-9. Sheath Length "L" (in whole inches) - (enter two digits 00 to 99)
Tens - Ones

10. Sheath Length "L" (fractional inches) - (choose 0 or 4)
0 = 0
4 = 1/2

11. Junction Type (choose E, G or U)
E = Exposed
G = Grounded
U = Ungrounded

12. Calibration (choose E, J, K,T, 2, 3, 4 or 8)
Limited Availability - consult yellow chart below for availability with sheath diameter & sheath material.
E = Standard Limits Type E
J = Standard Limits Type J
K = Standard Limits Type K
T = Standard Limits Type T
2 = Special Limits Type E
3 = Special Limits Type J
4 = Special Limits Type K
8 = Special Limits Type T

13-14. Unused - Enter "00"
00 = Unused

15. Special Requirements
0 = None

ENTER QUANTITY (Higher price applies for quantities less than 5 pieces)


Options 3, 7 & 12
Calibration & Sheath Availability

Sheath Diameter
Sheath
Material		 0.020
(B)		 0.032
(C)		 0.040
(D)		 0.063
(E)		 0.125
(G)		 0.188
(H)		 0.250
(J)
304SS
(A)		 K
4		 K
4		 J, K
3, 4		 J, K, T
3, 4, 8		 J, K, T
3, 4, 8		 J, K, T
3, 4, 8		 J, K, T
3, 4, 8
316SS
(F)		 --
--		 --
--		 K
4		 E, J, K
2, 3, 4		 E, J, K, T
2, 3, 4, 8		 E, J, K, T
2, 3, 4, 8		 E, J, K, T
2, 3, 4, 8
Alloy 600
(Q)		 K
4		 K
4		 K
4		 J, K
3, 4		 J, K, N
3, 4		 J, K, N
3, 4		 J, K, N
3, 4
This page last modified on 1/17/2023
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