ESMWRN Prefabricated K-type thermocouple probe for 304 stainless steel

The K-type thermocouple is based on the Seebeck effect, which states that when the junctions of two different metals are at different temperatures, a potential difference will be generated between them. A K-type thermocouple consists of a nickel-chromium alloy (positive) and a nickel-aluminum alloy (negative). When there is a temperature difference between the hot and cold junctions, a thermoelectric voltage is generated in the circuit, and the temperature can be inferred by measuring this voltage difference.

1. K-type calibration, wide temperature range: 0–1200℃, most versatile
2. Modular structure, assembled in parts, easy to replace the core, low maintenance cost, fast response, good linearity, strong stability, and oxidation resistance
3. Various protective tubes: 304/316/2520/high-alumina ceramic tubes, high-temperature resistance, corrosion resistance, wear resistance
4. Threaded / flange installation, easy fixation, suitable for pipelines, furnace, and equipment fixed-point temperature measurement
5. Can be made waterproof, explosion-proof, armored, suitable for chemical, power, metallurgical, and boiler applications

1. High-Temperature Heating and Heat Treatment Industry
This is the most core application area of K-type thermocouples, utilizing their high-temperature resistance.
Industrial Furnaces: such as annealing furnaces, quenching furnaces, tempering furnaces, sintering furnaces. Used to monitor furnace temperature to ensure the accuracy of metal heat treatment process curves.
Ceramics and Glass Manufacturing: temperature control for tunnel kilns and roller kilns. Usually used with alumina (aluminum oxide) protective tubes to withstand temperatures above 1200°C.
Injection Molding and Die-Casting Machines: monitoring barrel and mold temperatures. Modular design can withstand high-pressure impact from molten plastic or metal.
Carbonization Furnace/Drying Oven: temperature monitoring in the processes of wood carbonization or food drying.

2. Petrochemical and Energy Industry
Utilizing its explosion-proof junction box and corrosion-resistant protective tube features.
Pipeline Fluid Temperature Measurement: monitoring the temperature of crude oil, natural gas, and steam pipelines. Usually installed with fixed threads or flanges to ensure no leakage under high pressure.
Reactors/Storage Tanks: liquid temperature monitoring during chemical reactions. Commonly uses 316L stainless steel or Hastelloy protective tubes to resist acid and alkali corrosion.
Boiler Systems: measuring flue gas temperature at superheaters and economizers, or water temperature in power plant boilers.
Gas Turbines/Engines: exhaust temperature monitoring (requires fast response type).
Special Requirements: in such cases, explosion-proof junction boxes (Ex d IIC T6) are often selected to prevent ignition of flammable gases by electric sparks.

3. Power and New Energy Industry
Thermal Power: temperature measurement of main steam pipes, reheat steam pipes, and feedwater systems.
Wind Power: monitoring generator winding and gearbox oil temperature (requires vibration-resistant design).
Solar Thermal Power Generation: monitoring the temperature of heat transfer oil or molten salt in the collector field.
Battery Testing: although lithium batteries often use surface mount sensors internally, modular K-type probes are commonly used in battery pack charge/discharge test cabinets to monitor ambient temperature or coolant temperature.

4. Machinery Manufacturing and Metallurgy
Steelmaking: hot blast stove and converter flue temperature.
Welding Equipment: monitoring preheating temperature for welding or post-weld heat treatment temperature.
Rubber Vulcanization: temperature control inside vulcanizing tanks to ensure the quality of rubber products.
Bearings and Motors: monitoring bearing temperature in large rotating machinery to prevent overheating and damage.