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Watlow Style AF Metal Transition
MI Thermocouple
Mineral Insulated - Single Element
Metal Transition with Spring Strain Relief

The Watlow Style AF Mineral Insulated Thermocouple temperature sensor "metal transition" style come with a metal transition with spring strain relief and lead wires. 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 AF Single Element Thermocouple build the desired 15-digit model part number using the ordering information form below.

Download Watlow Style AF Thermocouple Catalog Page (pdf)

Custom Ordering Information -
Watlow Style AF Single Element Thermocouples
A F ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___
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
Price
AF = Mineral insulated metal transition thermocouple

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 $68.60
C = 0.032 inch diamater $58.40
D = 0.040 inch diamater $55.00
E = 0.063 inch diamater $22.40
G = 0.125 inch diameter $23.00
H = 0.188 inch diameter $27.00
J = 0.250 inch diameter $29.40

4. Lead Wire Construction Type (choose A, B , C, D, J, K, L, M, R, S, T or U)
Limited Availability - consult blue chart below for pricing and availability with sheath diameter.
A = Solid glass see below
B = Stranded glass see below
C = Solid FEP see below
D = Stranded FEP see below
J = Solid glass with SS braid see below
K = Stranded glass with SS braid see below
L = Solid Teflon with SS Braid see below
M = Stranded Teflon with SS Braid see below
R = Solid glass with flex armor see below
S = Stranded glass with flex armor see below
T = Solid teflon with flex armor see below
U = Stranded teflon with flex armor see below

5. Fittings (choose one)- please note sheath size availability
0 = None NC
A = Fixed single thread 1/8 NPT 303SS - sheath sizes 0.063 to 0.250 $10.50
B = Fixed single thread 1/4 NPT 303SS - sheath sizes 0.125 to 0.250 $15.00
D = Fixed single thread 1/2 NPT 303SS - sheath sizes 0.125 to 0.250 $15.00
F = Fixed double thread 1/2 NPT 303SS - sheath sizes 0.125 to 0.250 $20.00
G = Adjustable compression TFE Gland 1/8 NPT 303SS - sheath sizes 0.063 to 0.188 $8.25
H = Adjustable spring loaded double threaded 1/2NPT 316SS - sheath size 0.250 $20.00
J = Non-adjustable compression 1/8 NPT brass - sheath sizes 0.125 to 0.250 $6.00
L = Non-adjustable compression 1/8 NPT 303SS - sheath sizes 0.063 to 0.250 $9.50
Q = Adjustable compression Lava Gland 1/8 NPT 303SS - sheath sizes 0.063 to 0.188 $12.00
V = Adjustable compression Lava Gland 1/4 NPT 303SS - sheath size 0.250 $40.00
W = Bayonet lockcap and spring - plated steel - sheath sizes 0.125 to 0.188 $9.50
X = Adjustable compression TFE Gland 1/4 NPT 303SS - sheath size 0.250 $39.00
2 = Flat weld pad - 304SS - all sheath sizes $20.00
5 = Milled slot weld pad - 304SS - all sheath sizes $23.00

6. Lead Wire Termination (choose A, B , C, F, G, H, T or U)
A = Standard plug $10.00
B = Standard jack $11.50
C = Standard plug with mating connector $17.30
F = Miniature plug $8.20
G = Miniature jack $9.00
H = Miniature plug with mating connector $12.00
T = Standard 1-1/2 inch split leads NC
U = 1-1/2 inch split leads with spade lugs $1.75

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

8-9. Sheath Length "L" (in whole inches) - (enter two digits 00 to 99) - consult green chart below for pricing.
Tens - Ones
see below

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

11. Junction Type (choose E, G or U)
E = Exposed - (0.020-0.040 diameter $4.00, 0.063-0.250 diameter $2.00) $4.00/$2.00
G = Grounded NC
U = Ungrounded - (0.020-0.040 diameter $9.00, 0.063-0.250 diameter $3.05) $9.00/$3.05

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 NC
J = Standard Limits Type J NC
K = Standard Limits Type K NC
T = Standard Limits Type T NC
2 = Special Limits Type E $5.00
3 = Special Limits Type J $5.00
4 = Special Limits Type K $5.00
8 = Special Limits Type T $5.00

13-14. Lead Length "E" (feet) - (enter two digits 01 to 99) (see blue chart below for pricing)
Tens - Ones

15. Special Requirements
0 = Standard 300°F (150°C) potting NC
H = 1000°F (540°C) potting - only available with fiberglass lead wire (item 4 A,B,J,K,R,S) $3.00
M = 500°F (260°C) potting $2.00

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
Options 7-10
Sheath Length Pricing (per inch)

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) $0.22 $0.22 $0.22 $0.22 $0.27 $0.37 $0.60
316SS (F) N/A N/A $0.27 $0.27 $0.33 $0.43 $0.70
Alloy 600 (Q) $0.27 $0.27 $0.33 $0.33 $0.43 $0.85 $1.50
Options 4, 13 &14 -
Lead Wire Pricing
Option
Code
Lead Wire
Construction Type
Sheath Diam.
(Item 3)
Base
Price
Price per foot
0.010 to 0.125 0.188 to 0.250
A Solid Glass 0.010 to 0.250 NC $0.85 $1.15
B Stranded Glass 0.063 to 0.250 NC $1.05 $1.35
C Solid FEP 0.010 to 0.250 NC $0.85 $1.15
D Stranded FEP 0.063 to 0.250 NC $1.05 $1.35
J Solid Glass w/SS Braid 0.040 to 0.250 NC $1.35 $1.75
K Stranded Glass w/SS Braid 0.063 to 0.250 NC $1.65 $1.95
L Solid Teflon w/SS Braid 0.040 to 0.250 NC $1.35 $1.75
M Stranded Teflon w/SS Braid 0.063 to 0.250 NC $1.65 $1.95
R Solid Glass w/Flex Armor 0.063 to 0.250 $8.00 $2.45 $2.85
S Stranded Glass w/Flex Armor 0.063 to 0.250 $8.00 $2.65 $3.05
T Solid Teflon w/Flex Armor 0.063 to 0.250 $8.00 $2.45 $2.85
U Stranded Teflon w/Flex Armor 0.063 to 0.250 $8.00 $2.65 $3.05
This page last modified on 8/1/2014
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