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Watlow Melt Bolt Thermocouple
Direct measurement of temperature in the plastic stream of a molding machine
Watlow Melt Bolt Thermocouple temperature sensors - are designed so that the sensitive closed end portion of the tip can be inserted directly into the plastic stream of an extruder or injection molding machine. The measuring junction is thermally isolated from the metal bolt mass, assuring accurate reading of the melt temperature up to 260°C (500°F) continuous. Bolt is 300 series stainless steel.

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 from stock 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.

FAST DELIVERY--Watlow’s “custom-tailored” stock program allows same or next day shipment on over 5,000,000 thermocouple variations. The program includes: 32 standard sheath lengths; lead lengths from 6 to 999 inches; stainless steel braid or hose protection; J, K, T, & E calibrations; grounded, ungrounded & exposed junctions; flat, rounded and drill point tips.

TERMINATION OPTIONS include: 1-1/2” split leads, spade lugs, 1/2” BX connector & spade lugs, standard size male & female TC plugs.

To order a Watlow Melt Bolt Thermocouple build the desired 15-digit model part number using the ordering information form below.

Download Watlow Melt Bolt Thermocouple Catalog Page (pdf)
Custom Ordering Information -
Watlow Melt Bolt Thermocouples
M ___ ___ ___ ___ ___ A 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, then click the "submit" button at the bottom of the page.
The part number and price will be displayed on the next page.
1-2 Construction Style Price
M1 & M2		 Price
M3
M1 = Fixed immersion $26.00 N/A
M2 = Adjustable immersion $32.00 N/A
M3 = Fixed immersion with flex armor N/A $23.50

3. Sheath Diameter
G = 0.125 inch diameter NC NC

4. Lead Wire Construction (choose 0 or R)
O = No flex armor (M1 and M2 only) NC N/A
R = S.S. flex armor (M3 only) N/A $10.25

5. Melt Bolt Length "A" (choose 1 or 2)
1 = 3 inch $34.00 $34.00
2 = 6 inch $54.00 $54.00

6. Cold End Terminations (choose A, B, C, T, U or W)
A = Standard male plug NC $10.00
B = Standard female jack $1.00 $11.50
C = Standard male plug with mating connector $5.80 $15.80
T = Standard 1-1/2 inch split leads (Style M3 only) N/A NC
U = Standard 1-1/2 inch split leads with spade lugs (Style M3 only) N/A $1.70
W = 1-1/2 inch split leads with BX connector & spade lugs (Style M3 only) N/A $5.60

7. Probe Construction
A = Mineral insulated with 304SS sheath NC NC

8. Unused - Enter "0"
0 = Unused NC NC

9. Immersion Length "I" (in whole inches) - (choose 0, 1, 2, 3, 4, 5 or 6)
0 = 0 (flush) NC NC
1 = 1 inch NC NC
2 = 2 inch NC NC
3 = 3 inch NC NC
4 = 4 inch NC NC
5 = 5 inch NC NC
6 = 6 inch NC NC

10. Immersion Length "I" (fractional inches) - (choose 0, 1, 2, 3, 4, 5, 6 or 7)
0 = 0 (flush) NC NC
1 = 1/8 NC NC
2 = 1/4 NC NC
3 = 3/8 NC NC
4 = 1/2 NC NC
5 = 5/8 NC NC
6 = 3/4 NC NC
7 = 7/8 NC NC

11. Junction Type (choose G or U)
G = Grounded NC NC
U = Ungrounded
$3.00
$3.00

12. Calibration (choose J, K, 3 or 4)
J = Standard Limits Type J NC NC
K = Standard Limits Type K NC NC
3 = Special Limits Type J $5.00 $5.00
4 = Special Limits Type K $5.00 $5.00

13-14. Extension Length "E" (in whole inches) - (enter two digits 02 to 99) - 2" minimum length.
Tens - Ones
$0.20/in.
$0.25/in

15. Special Requirements
0 = None
NC
NC

This page last modified on 5/8/2008
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