Thermocouple for Molten Copper & Brass with LT-1 Metal Protection Tube Assembly

Special Thermocouples: An Overview

Special thermocouples are designed for demanding and highly specific industrial applications where standard configurations may not suffice. These sensors are engineered with enhanced protection, customized assemblies, and application-focused materials to ensure accuracy, reliability, and longevity under extreme conditions. Whether operating in molten metal environments, fluidized beds, or specialized furnaces, special thermocouples are built to meet the unique thermal, mechanical, and chemical challenges of the process.

Working Principle

Like standard thermocouples, special thermocouples operate based on the Seebeck effect. Two dissimilar metals form a thermoelectric circuit; when the two junctions are at different Temperatures, a voltage is generated that corresponds to the Temperature difference. This voltage can be measured and converted into Temperature using standard calibration data. What distinguishes special thermocouples is their robust construction, protective assemblies, and optimized materials suited to extreme industrial applications.

Type R thermocouples consist of a Platinum (Pt) and Platinum-13% Rhodium (Pt-Rh) combination. They are used extensively in high-Temperature environments (0°C to 1600°C) and offer exceptional accuracy (±0.25%) and stability. They are ideal for use in metallurgy, glass, and ceramic industries due to their resistance to oxidation and thermal shock.

Type B thermocouples are made of Platinum-30% Rhodium and Platinum-6% Rhodium. Designed for extremely high Temperatures (up to 1800°C), they are commonly used in high-Temperature furnaces and molten metal applications. They have excellent long-term stability and an accuracy of ±0.50%, making them suitable for continuous use in extreme environments.

Type S thermocouples are composed of Platinum and Platinum-10% Rhodium and offer similar performance to Type R. They operate accurately up to 1600°C and are commonly used in laboratories, metal processing, and pharmaceutical environments where high accuracy (±0.25%) is essential.

Model SP1 – Manufactured by Ajmer Thermotech Pvt. Ltd.

Ajmer Thermotech Pvt. Ltd., an ISO 9001:2015 and CE certified company, manufactures the Model SP1 special thermocouple for molten copper and brass measurement applications. This model features a noble metal thermocouple housed in a high-durability LT-1 metal protection tube assembly, designed to endure the aggressive and corrosive conditions of non-ferrous molten metal environments.

The SP1 thermocouple provides precise and reliable Temperature monitoring during melting, casting, and refining operations involving copper, brass, and similar alloys. The LT-1 protection tube offers excellent resistance to thermal shock, corrosion, and erosion caused by molten metal contact, ensuring a longer operational life and reduced maintenance.

This model is typically configured with Type R, S, or B noble metal thermocouples due to their superior Temperature range and stability. Ajmer Thermotech offers full customization of the SP1 assembly, including thermocouple type, junction configuration, lead wire specifications, and protection length to meet specific furnace or foundry requirements.

Designed for precision and performance in extreme industrial conditions, the Model SP1 is a trusted solution for high-Temperature applications requiring the utmost accuracy and durability. Ajmer Thermotech’s commitment to engineering excellence and application-specific solutions makes the SP1 a vital component in molten metal Temperature Control.