Immersion Thermocouple

Product Introduction

The working principle of the thermocouple is based on the Seebeck effect. Mainly used to measure the temperature of molten steel and high-temperature molten metals. Rapid temperature measurement thermocouples are used in major, medium and small steelmaking plants, and are used to measure the temperature of liquid steel in front of, after the furnace and large, medium and small steel bags. They have fast response speed and high measurement rate.

The Immersion Thermocouple is a high-precision temperature sensor designed specifically for direct immersion into molten metals and other high-temperature materials. Engineered for rapid and reliable thermal response, this type of thermocouple is  used in the steel, foundry, non-ferrous metals, and metallurgical industries widely. Its robust design, high accuracy, and disposable or reusable configurations make it a critical tool for process control in extreme environments.

Product performance and features

1. Accurate temperature measurement and high accuracy. Error range: ±3℃

2. Fast response speed, short measurement time, convenient and safe operation.

3. Production using International Practical Temperature Standards (IPTS) 68 and (ITS) 90, it is compatible with the  used instruments and systems on the market commonly and interchangeable.

4. Complete product types, tungsten rhenium (Wre3/25), R type (Pt/Rh13-Pt), S type (Pt/Rh10-Pt), and B type (Pt/Rh30-Pt/Rh6) are all available for customers to choose from

Product Details

Thermocouple Types: Type S, R, B (Platinum-Rhodium based for high-temperature use)

Temperature Range: Up to 1800°C (3272°F)

Tip Type: Expendable, fast-response tip with platinum alloy junction

Sheath Options: Quartz, ceramic, or metal protection tubes

Handle/Support: Cardboard tube, steel lance, or aluminum adapter

Length Options: 300mm – 1800mm (custom lengths available)

Response Time: ≤ 5 seconds

Accuracy: ±0.5% of reading

Product Features

Direct Immersion Capability: Designed for insertion into molten steel, iron, aluminum, and copper

Fast Thermal Response: Measures temperature in under 5 seconds

High Temperature Resistance: Platinum-rhodium alloy tip performs reliably under extreme heat

Modular Design: Compatible with a wide range of immersion lances and temperature readers

Customizable Configuration: Choose from different lengths, connectors, and protective sheaths

Product Advantages

Accurate Real-Time Readings: Reduces error and improves process control in metal production

Time-Saving: Instant readings help minimize delays in tapping or pouring operations

Disposable & Safe: Single-use tips reduce contamination and improve workplace safety

Versatile Application: Adaptable to various metal types and industrial environments

Low Maintenance: No recalibration or cleaning needed; simply replace the unit after use

Applications

Steel Plants: Monitoring molten steel temperature during tapping, ladle handling, and casting

Foundries: Ensuring accurate temperature control during the melting of iron, copper, and aluminum

Non-Ferrous Metalworks: Precision monitoring for alloys, billets, and ingot production

Continuous Casting Lines: Real-time feedback for automated process adjustment

Thermal Laboratories: Used for test environments simulating industrial heat conditions

FAQ

Q1: How many times can an immersion thermocouple be used?

A1: Most immersion thermocouples are single-use, especially in molten metal applications. Reusable options are available upon request.

Q2: What materials are used for the tip?

A2: Typically, platinum-rhodium alloys are used due to their stability at high temperatures.

Q3: Can it be customized?

A3: Yes. We offer custom lengths, protection tubes, and connectors based on your operational needs.

Q4: Is it compatible with my existing immersion lance?

A4: Yes, our products are designed to fit most standard immersion lances and readers used in the industry.

Q5: How fast does it respond?

A5: It provides accurate readings within 3–5 seconds of immersion.