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TC22 Nozzle Melt Thermocouple with Lead Wire

SKU: TC22
Threaded Melt Temperature Sensor

TC22 Nozzle Melt Thermocouple with Lead Wire

Threaded Nozzle Melt Thermocouple for Accurate Plastic Processing Temperature Measurement

Preserving accurate nozzle temperature is vital for consistent melt quality and reliable plastic processing. The TC22 Threaded Nozzle Melt Thermocouple is designed to measure melt temperature directly at the nozzle, helping improve process stability, reduce temperature variation, and support consistent production quality. Its rugged MgO mineral insulated construction provides excellent resistance to vibration, thermal cycling, and harsh industrial environments, rendering it suitable for continuous operation on injection molding machines, plastic extrusion equipment, and other polymer processing systems. Available in Type J and Type K thermocouples with configurable thread sizes, lead wire lengths, insulation materials, and connector options, the TC22 can be customized to meet OEM and replacement requirements while delivering dependable, long-term temperature measurement performance.

Rugged MgO Construction

MgO mineral insulated construction withstands vibration, thermal cycling, and harsh industrial operating conditions for dependable long-term performance.

Fast Thermal Response

Optimized sensing tip design delivers rapid response to changing melt temperatures, improving process control and production consistency.

Direct Melt Temperature

hreaded nozzle design positions the sensing tip directly in the melt stream for accurate and repeatable temperature measurement

Multiple Termination

Choose bare ends, standard, miniature, or high-temperature connectors for easy integration with existing control systems

High-Temperature

Available in Type J and Type K thermocouples for reliable temperature measurement across demanding plastic processing applications.

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Custom Configuration

Configure thread size, probe length, thermocouple type, lead wire, insulation, and connector options for your application.

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Quick Specifications

Thermocouple Type Type J or Type K
Mounting Thread 3/8"-24 Thread (Standard), Custom Sizes Available
Junction Type Grounded or Ungrounded
Probe Construction MgO Mineral Insulated or Tube & Wire
Probe Configuration Straight, 45°, or 90° Bend
Sheath Material 316 Stainless Steel
Ideal for
Plastic Injection
Plastic Extrusion
Polymer Processing
Blow Molding
Hot Runner
Rubber
Mold & Die
OEM Machine
The TC22 Nozzle Melt Thermocouple with Lead Wire is made to deliver accurate, reliable melt-temperature measurements in plastic processing applications where process stability directly affects product quality. Designed with a threaded nozzle bolt that places the sensing tip in direct contact with the melt stream, the TC22 provides fast, repeatable temperature readings while remaining securely mounted during continuous production. It is commonly used on plastic injection molding machines, plastic extrusion equipment, blow molding systems, and other polymer processing machinery where keeping precise nozzle temperature is vital for consistent results.
Manufactured with rugged MgO mineral-insulated construction, the TC22 offers excellent resistance to vibration, mechanical stress, and demanding industrial environments. Customers can choose from Type J or Type K thermocouples, along with grounded or ungrounded junctions, allowing the sensor to be configured for different process requirements and response characteristics. The sensor is also available with multiple lead wire lengths, insulation materials, connector styles, probe angles, and custom bolt dimensions to simplify installation into both new OEM equipment and replacement installations.
The threaded bolt design provides a secure mechanical connection while positioning the sensing tip exactly where accurate melt temperature measurement is required. This helps reduce temperature variation, improve process control, and support higher product consistency during molding and extrusion operations. Optional strain-relief springs, stainless-steel armor, wire clamps, silicone boots, and standard or miniature connectors are available to improve durability and simplify installation in demanding manufacturing environments.
Each TC22 thermocouple is manufactured to ASTM E608/E608M requirements, with temperature tolerances that meet IEC 60584 and ANSI MC96.1 standards. Calibration services are available upon request in accordance with ASTM E220 for uses needing documented measurement traceability.
Whether you are replacing an existing nozzle melt thermocouple, designing new plastic processing equipment, or upgrading an extrusion temperature-sensing system, the TC22 provides a dependable, customizable solution for long-term industrial temperature measurement. For additional technical guidance, you may also find these resources helpful: Melt Temperature Measurement, Injection Molding Temperature Control, Plastic Extrusion Temperature Monitoring, Grounded vs. Ungrounded Thermocouples, Type J vs. Type K Thermocouples, and ASTM E608 Thermocouple Standard. These topics are useful internal or educational links that can strengthen both SEO and user experience.

Product Specifications

Review the standard specifications and available configuration options for the TC22 Thermocouple. Sheath diameter, insertion length, thermocouple type, lead wire, insulation, connector style, temperature rating, and optional features may vary depending on the selected configuration and application requirements

Thermocouple TypeType J or Type K
Mounting Thread3/8"-24 Thread (Standard), Custom Sizes Available
Junction TypeGrounded or Ungrounded
Probe ConstructionMgO Mineral Insulated or Tube & Wire
Probe ConfigurationStraight, 45°, or 90° Bend
Sheath Material316 Stainless Steel
Tip Length1/8", 3/16", or 1/4"
Lead Wire & TerminationPTFE, Fiberglass, SS Armor, Bare Ends, Standard, Miniature & High-Temperature Connectors
Optional AccessoriesStrain Relief Spring, Wire Clamp, Silicone Connector Boot
Compliance StandardsASTM E608/E608M, IEC 60584, ANSI MC96.1 (ASTM E220 Calibration Available)

Spare Parts & Accessories

Complete your installation with compatible mounting accessories, connectors, and replacement components for the TC22 Thermocouple.

Image: MJS-MULTI JACK PANEL

MJS-MULTI JACK PANEL

Multi Jack panel  for thermocouples and RTDs. Can be connected upto 6 or custom number of sensors simultaneously. Construction Anodized aluminium plate. Available in 1 thru 6 circuits version. Corresponds with standard…

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Product Videos

Watch product overview, installation, and application videos for the T22 Thermocouple

Temperature Transmitter | Tempotech Controls Inc

PT2M44S

A temperature transmitter takes the temperature data from a sensor, like an RTD or thermocouple, and converts it into a standard signal, usually 4-20mA or 0-10V. This signal can be sent to control systems, PLCs, or monitoring equipment to keep track of temperature in real-time.

Read transcript

Video Transcription: Temperature Transmitter Technology & Application
[00:05] A temperature transmitter is a critical component in industrial automation that converts low-level sensor signals into standardized outputs. This ensures accurate, reliable, and long-distance signal transmission for complex control systems.

[00:14] Thermocouple and RTD sensors are the industry standards for measuring the temperature of processed media. However, in challenging environments—characterized by high temperatures, electromagnetic interference (EMI), or long cable runs—the raw signals from these sensors can degrade.

[00:33] This signal degradation, often caused by wire resistance and electrical noise, can lead to inaccurate readings. To mitigate these issues, temperature transmitters are used to amplify, condition, and convert sensor data into a standardized 4-20mA output, ensuring high-integrity data across the plant.

[00:59] Several signal types are used depending on the application:

4 to 20 mA Analog Signal: The most common standard, highly resistant to noise and ideal for long distances.

0 to 10V: A common analog option, though more susceptible to signal loss over length.

Digital Signals (HART & Modbus): Used for advanced remote communication and diagnostics.

RS485/RS232: Essential for integrating transmitters with PLCs and SCADA systems.

[01:35] The Tempotech TT367 series temperature transmitters are engineered for versatility. They offer precise sensor-transmitter matching and robust protection against interference. Configurable via the HART protocol, these units allow for easy setup and reliable field operation.

[01:56] Key reliability features include open/short-circuit detection, incorrect wiring alerts, and NAMUR NE43 failure standards. The TT367 supports RTD, TC, Ohm, and Millivolt inputs, making it a universal solution for your instrumentation needs.

[02:26] With integrated dot-matrix displays and easy configuration options, our transmitters provide the precision you can trust. Contact our technical sales team today to find the best transmitter for your application.

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Frequently Asked Questions

Find answers to common questions about the TC22 thermocouple

How do I select the correct nozzle melt thermocouple for my injection molding or extrusion machine?+

Select the thermocouple based on the thread size, thermocouple type (J or K), junction style, probe angle, tip length, immersion depth, lead wire insulation, and operating temperature. Matching these parameters to your equipment helps improve measurement accuracy, sensor life, and process stability.

What is the difference between a nozzle melt thermocouple and a melt bolt thermocouple?+

Both sensors measure melt temperature using a threaded mounting design. A nozzle melt thermocouple is typically installed at the machine nozzle to monitor melt temperature before injection or extrusion, while a melt bolt thermocouple is commonly mounted in barrels, adapters, or process components where continuous melt temperature monitoring is required. The correct choice depends on the equipment design and measurement location.

Can the TC22 be manufactured to match my OEM equipment?+

Yes. The TC22 can be customized with different thread sizes, probe angles (straight, 45°, or 90°), tip lengths, immersion lengths, lead wire lengths, insulation materials, connectors, and thermocouple types to meet OEM specifications or replace existing sensors without modifying equipment.

How can I improve the accuracy and service life of a nozzle melt thermocouple?+

Install the thermocouple using the correct thread engagement and immersion depth, ensure the sensing tip is positioned in the melt flow, and select the proper thermocouple type, junction style, and insulation for the operating environment. Proper installation and configuration help improve measurement repeatability, reduce sensor wear, and extend service life.

When should I specify a welded tip instead of a brazed tip?+

The TC22 is available with welded or brazed tip construction. For high-pressure plastic processing applications, welded construction generally provides greater mechanical strength and durability. The appropriate choice depends on the process pressure, operating conditions, and OEM design requirements.

Which lead wire insulation is recommended for my molding or extrusion machine?+

The TC22 is available with PTFE (205°C), high-temperature PTFE (260°C), and fiberglass (510°C) insulation. The correct insulation should be selected based on the ambient temperature around the nozzle, cable routing, and exposure to heat, abrasion, or mechanical movement.

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