Alumina Ceramic Thermocouple Protection Tube

Alumina Ceramic Thermocouple Protection Tube

Alumina ceramic thermocouple protection tubes are used to protect thermocouples from severe conditions. It serves as a barrier between the thermocouple and the environment, shielding the thermocouple from contamination and damage. It also helps to maintain accurate temperature measurements by providing the thermocouple a stable and consistent environment.

The high-purity alumina ceramic thermocouple protection tubes have outstanding heat resistance and chemical resistance, making them suitable for industries like metallurgy, chemical industry, petrochemicals, etc.

Benefits of Alumina Ceramic Thermocouple Protection Tube

High-Temperature Resistance

It can retain high strength in high temperature environments and is not easily cracked or broken. The service temperature ranges from 1,500 to 1,700 °C.

High Corrosion Resistance

It is advantageous to measure the temperature of corrosive chemicals like acids and alkalis since it is not corroded in various acid-base molten liquids.

High Thermal Conductivity

It swiftly transmits the temperature of the molten liquid to the thermocouple, resulting in a faster response time and more accurate temperature readings.

High Mechanical Strength

When working, it can withstand pressure and vibration. This is crucial in applications involving high pressure or vibration, such as the oil and gas industry.

 

Common Specification

Alumina ceramic thermocouple protection tubes typically range from 4 to 30 mm in outer diameter, with wall thicknesses that are proportionate to the product size between 0.75 and 4 mm. The common specifications are as follows:

Alumina Ceramic Thermocouple Protection Tube

The length of the above specs can be customized, and the inventory is large, allowing for fast delivery within 7 days.

 

Product Packaging

UNIPRETEC uses shock-absorbing materials like foam or bubble pads inside the packaging, and cartons, wooden boxes, hangers, and other shock-absorbing materials on the outside to ensure the safety and integrity of the products during transport.

 

Description of Shapes

Tubular Structure: Typically, alumina ceramic thermocouple protection tubes are straight tubes with an inner diameter that corresponds to the thermocouple diameter.

constant Wall Thickness: Consistent wall thickness of the protective tube contributes to constant heat conductivity and protection efficacy.

Smooth Inner and Outer Walls: The tube is made simpler to clean and maintain by having smooth inner and outer walls that lessen friction and material adhesion.

Installation and connection of the protective tube may be made easier by the design of threads, flanges, or fast connections at both ends.

Variable Length: To suit various measuring depths and situations, the protective tube may be supplied in various lengths according to the application needs.

Wear-Resistant Edges: The tube mouth's edge is specifically coated to minimize wear and damage.

High Temperature Resistant Design: The protective tube is designed not to easily bend or split and to endure prolonged high temperature conditions.

Aspects of Design

High Temperature Resistance: Alumina ceramic protective tubes must to be able to tolerate temperatures as high as 1700°C.

Chemical Stability: In order to stop corrosion, the protective tube material must be compatible with any chemicals that could be present in the measuring environment.

Thermal Conductivity: To guarantee the thermocouple can react precisely and fast to temperature changes, the protective tube's thermal conductivity should be maximized.

Mechanical strength: The protective tube has to be strong enough mechanically to bear the physical strain during usage, cleaning, and installation.

Thermal expansion coefficient: To prevent mechanical strain brought on by temperature variations, the protective tube's thermal expansion coefficient should match that of the thermocouple material.

Thermal shock resistance: The protective tube need to be able to bear sharp temperature swings without shattering or cracking.

Simple installation: To save maintenance time and effort, the protective tube need to be made to be simple to install and remove.

Application Areas

Steel industry: Slag and molten metal shield the thermocouples in high-temperature machinery like rolling mills and steelmaking furnaces from erosion.

Kiln monitoring is the measurement and management of furnace temperature in kilns used in the ceramic, glass, cement, and other industries.

Chemical industry: Corrosive gasses and liquids cannot harm the thermocouples in high-temperature pipes and chemical reactors.

Power industry: Temperature measuring precision and safety are guaranteed in high-temperature, high-pressure settings like boilers and steam pipes.

High-temperature gas temperatures are monitored in the automotive sector for engine testing and exhaust gas treatment systems.

Aerospace: Throughout high-temperature component manufacture and rocket engine testing, monitor and regulate temperature.

Food processing: Throughout baking, sterilizing, and high-temperature cooking, guarantee the quality and safety of the food.

Environmental monitoring: Track the exhaust gas temperatures in high-temperature flue gas treatment and incinerator systems.

In high-temperature physics and chemical investigations, precisely gauge the experimental ambient temperature.

Medical equipment: Temperature control and monitoring are features of several high-temperature sterilizing and disinfection equipment.

Alumina ceramic thermocouple protection tubes are extensively utilized in the metallurgical, chemical, petrochemical, and other industries, and are ideally suited for high-temperature and highly corrosive environments. This product is frequently used for the following purposes:

Metallurgical Industry

The protection tubes are used to measure the temperature of molten metals like steel and aluminum.

Chemical Industry

The protection tubes can be used in reactors, distillation columns, and other chemical processes to measure the temperature of corrosive substances.

Petrochemical Industry

In refineries and petrochemical plants, the protection tubes are used to measure the temperature of high-temperature gases and liquids.

Power Generation Industry

The temperature of high-temperature gases and liquids in power plants, including boilers, steam turbines, generators, etc., is measured using the protection tubes.

The alumina material used in thermocouple protection tubes is dense alumina with high Al2O3 content, which can be further divided into 99.7, 99, and 95 alumina depending on different operating temperature that ranges from 1500 to 1700 °C; and it rises with increasing alumina concentration. The performance of alumina is detailed in the table above.

Precautions for Use

When using alumina ceramic thermocouple protection tubes, the temperature measuring element with insulation protection is installed in the protection tube, and then seal the open end and the couple head with high-temperature cement. When measuring temperature, insert the sealed end into the temperature-measuring area. Rapid cooling and rapid heating should be avoided, thereby preventing excessive damage to the protection tube caused by the large thermal shock, which will result in cracking.

Alumina Ceramic Thermocouple Protection Tube
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