Watlow Melt Bolt Thermocouple

Tip inserts directly into the plastic stream of an extruder or injection molding machine.

Retired products cannot be ordered

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Watlow plastic melt bolt thermocouples 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. The bolt is made of 300 series stainless steel.

Over 90 years of manufacturing research and design makes Watlow a world class supplier of temperature measurement products. Watlow has designed and manufactured millions of thermocouples for industrial and commercial equipment. Instrumart is ready to meet your sensing needs with an extensive offering of Watlow thermocouples.

If the variations listed are unable to satisfy your requirements, custom manufactured sensors to your exacting specifications are available.

Watlow SERV-RITE Thermocouple Wire
Watlow SERV-RITE Thermocouple Wire

Premium performance and reliability, Insulation temperature ranges from -328 to 2600°F (-200 to 1427°C).

Starting at $85.00
Watlow MC Series Miniature Thermocouple Connectors
Watlow MC Series Miniature Thermocouple Connectors

Miniature design enables mating with other miniature size thermocouple connectors.

Some Models in Stock
Starting at $5.80
Watlow SC Series Standard Connector
Watlow SC Series Standard Connector

SC Standard Connectors are ASTM color coded and made of Compensated alloys.

Starting at $7.90
Watlow SAC-220 Cable Clamp Connectors
Watlow SAC-220 Cable Clamp Connectors

Cable Clamp Connectors for Male or Female.

$5.20
Watlow SAB Series Crimp / Braze Connectors
Watlow SAB Series Crimp / Braze Connectors

Starting at $2.70
Watlow High Temperature Connectors
Watlow High Temperature Connectors

Starting at $34.40
Watlow SKP Single Panel Mount Hardware
Watlow SKP Single Panel Mount Hardware

Connectors Single Panel Mount Hardware, 425°F (218°C).

Starting at $26.15
Watlow Terminal Block for Standard Connection Heads
Watlow Terminal Block for Standard Connection Heads

Starting at $10.45
Watlow PT Polypropylene Head and Connector Blocks
Watlow PT Polypropylene Head and Connector Blocks

Starting at $52.40
Watlow Explosion Proof Thermocouple Connection Heads
Watlow Explosion Proof Thermocouple Connection Heads

Starting at $85.30
Watlow Standard Thermocouple Connection Heads
Watlow Standard Thermocouple Connection Heads

Made of cast iron (1/2, 3/4, or 1in NPT) or aluminum (1/2in NPT).

Some Models in Stock
Starting at $52.40
Watlow 50500701 / 50500801 Terminal Blocks for PT Heads
Watlow 50500701 / 50500801 Terminal Blocks for PT Heads

Single or dual elements for the PT Series polypropylene head.

Starting at $13.00