English
Truck Scale Manufacturer

Leading Thermocouple Alloy Factory Since 2002

● Strict Control Of Raw Materials
● 100% Quality Inspection
● More Than 20 Years Of Experience In The Industry
● 12,000m² Self-owned Factory
● Annual Production Capacity Of 1200 Tonnes
Request a Quote

Thermocouple Alloy Manufacturer & Supplier

DLX Alloy specializes in manufacturing and supplying high-quality Thermocouple Alloys available in various compositions, forms, and specifications. Our premium wires are designed for superior heat resistance, oxidation resistance, and durability, ensuring safety and performance. These eco-friendly materials are engineered for high-temperature applications, offering excellent corrosion resistance and stability. We provide a wide range of Thermocouple Alloy products, including wires, strips, and custom forms tailored to your needs.

Looking to purchase a bulk order of Thermocouple Alloys? DLX Alloy can meet your production requirements. If you have specific needs not listed here, feel free to request customization. Contact us today, and we’ll be happy to assist you!

DLX Thermocouple Alloy

10001~12
 
 

Thermocouple Wire

 
Thermocouple wires are materials used for measuring temperature, utilizing the thermoelectric...
 
 
10002~13
 
 

Thermocouple Extension & Compensating Wire

 
Made from alloys that match the thermocouple reference wire in the expected temperature range.
 
10003~12
 
 

Mineral Insulated Thermocouple Cable

 
Mineral Insulated cables are high-performance cables designed for extreme environmental ...
 

Still not finding what you're looking for? Contact our consultants for more available products.

Thermocouple Wire

Thermocouple wires are materials used for measuring temperature, utilizing the thermoelectric voltage which varies with temperature difference. These alloys feature high thermoelectric potential, a linear relationship between temperature and voltage, long-term stability, good uniformity, and excellent oxidation resistance, making them widely used in defense, research, metallurgy, chemical industries, and temperature sensing elements.

Thermocouple Wire Advantages

Thermocouple wires are materials used for measuring temperature, utilizing the thermoelectric voltage which varies with temperature difference. These alloys feature high thermoelectric potential, a linear relationship between temperature and voltage, long-term stability, good uniformity, and excellent oxidation resistance, making them widely used in defense, research, metallurgy, chemical industries, and temperature sensing elements.
10003~13

Thermocouple Wire Applications

100003168
 

Industrial processes

 
Monitoring the temperature in furnaces, kilns, and reactors.
 
Aerospace-Components
 

Aerospace

 
Measuring high-temperature parts such as jet engines.
 
100002871
 

Automotive

 
Engine testing and exhaust system monitoring.
  
HVAC
 

HVAC systems

 
Temperature regulation and control.
  
medical-equipment
 

Medical and laboratory

 
Low-temperature applications, sterilization, and research experiments.

K-Type Thermocouple Wire Usage

The K-type thermocouple, consisting of nickel-chromium (NiCr) and nickel-silicon (NiSi), is the most commonly used thermocouple in temperature ranges above 500°C. Its positive pole (KP) has a nominal composition of Ni:Cr≈90:10, and the negative pole (KN) has a composition of Ni:Si≈97:3. The temperature range is -200°C to 1300°C, suitable for oxidative and inert atmospheres. However, K-type thermocouples should not be used directly in high temperatures under sulfur, reducing, or alternating reduction-oxidation conditions, or in vacuum environments, and are not recommended for weakly oxidative atmospheres.
Diameter/mm Long-term Operating Temperature Short-term Operating Temperature
temperature/°C temperature/°C
0.3 700 800
0.5 800 900
0.8,1.0 900 1000
1.2,1.6 1000 1100
2.0,2.5 1100 1200
3.2 1200 1300

J-Type Thermocouple Operating Temperature

J-Type Thermocouples are suitable for use in vacuum, nitriding, oxidizing, reducing, and inert atmospheres, but the positive electrode (iron) oxidizes quickly at high temperatures. Therefore, the operating temperature is limited, and they cannot be used directly without protection at high temperatures above 500°C in oxidizing atmospheres.
Diameter /mm Long-term Operation Short-term Operation
°C °C
0.3 ,0.5 300 400
0.8, 1.0, 1.2 400 500
1.6, 2.0 500 600
2.5, 3.2 600 750

J-Type Thermocouple Operating Temperature

J-Type Thermocouples are suitable for use in vacuum, nitriding, oxidizing, reducing, and inert atmospheres, but the positive electrode (iron) oxidizes quickly at high temperatures. Therefore, the operating temperature is limited, and they cannot be used directly without protection at high temperatures above 500°C in oxidizing atmospheres.
Diameter /mm Long-term Operation Short-term Operation
°C °C
0.3 ,0.5 300 400
0.8, 1.0, 1.2 400 500
1.6, 2.0 500 600
2.5, 3.2 600 750

E-Type Thermocouple Wire Operating Temperature

E-Type thermocouples are less sensitive to corrosion in high-humidity atmospheres and are suitable for environments with high humidity. E-Type thermocouples also have good stability, better oxidation resistance than copper-constantan and iron-constantan thermocouples, and are more cost-effective. Suitable for use in oxidizing and inert atmospheres, widely adopted by users.

E-Type Thermocouples cannot be used directly at high temperatures in sulfur or reducing atmospheres because of its poor thermoelectric uniformity.
Thermocouple Wire, -200~900 ℃(for short term) and 0~750℃( for long term)
Compensation Wire, 32 to 392F (0 to 200℃)
Diameter/mm Long-term Operating Temperature Short-term Operating Temperature
0.3, 0.5 350 450
0.8, 1.0,1.2 450 550
1.6,2.0 550 650
2.5 650 750
3.2 750 900

T-Type Thermocouple Temperature Range

It has advantages such as good linearity, high thermoelectric voltage, high sensitivity, good stability and uniformity, and is cost-effective. Particularly used in the -200 to 0°C temperature range, with better stability, annual stability can be less than ±3μV. It can be used for low-temperature calibration as a second-class standard for low-temperature value transfer.

T-type thermocouple has poor oxidation resistance at high temperatures, limiting its maximum operating temperature.
Short-term -40~750 ℃
Long-term 0~600℃
Compensation Wire 32 to 392F (0 to 200℃)

N-Type Thermocouple Wire

Nickel-Chromium-Silicon or Nickel-Silicon-Magnesium Thermocouple (N-Type Thermocouple) is a low-cost metal thermocouple and the latest internationally standardized thermocouple. Its overall performance is superior to the K-type thermocouple. The N-type thermocouple should not be directly used in high-temperature sulfur, reducing, or cyclic reducing-oxidizing atmospheres and in a vacuum. It is also not recommended for weak oxidizing atmospheres.
 The nominal chemical composition of the positive electrode (NP) is: Ni:Cr:Si ≈ 84.4:14.2:1.4
The nominal chemical composition of the negative electrode (NN) is: Ni:Si:Mg ≈ 95.5:4.4:0.1
The temperature range for use is -200 to 1300°C.

S-Type Thermocouple Wire

Platinum-Rhodium wire is a binary alloy of platinum containing rhodium, which forms a continuous solid solution at high temperatures. Platinum-Rhodium wire in the thermocouple series has high accuracy, excellent stability, a wide temperature measurement range, long service life, and high maximum temperature measurement capabilities. Suitable for use in oxidizing and inert atmospheres, it can also be used short-term in a vacuum, but is not suitable for reducing atmospheres or atmospheres containing metallic or non-metallic vapors.
 Platinum Rhodium-10% Platinum

R-Type Thermocouple Wire

R-type thermocouple wire is a high-precision temperature measurement solution used in industrial and laboratory applications requiring extreme accuracy and stability. This thermocouple type is composed of platinum (Pt) and rhodium (Rh) alloys, making it highly resistant to oxidation and suitable for high-temperature environments.
 Platinum Rhodium-13% Platinum

B-Type Thermocouple Wire

The B-type thermocouple is a platinum-rhodium thermocouple, also known as a high-temperature precious metal thermocouple. These are widely used as temperature sensors, typically in conjunction with temperature transmitters, controllers, and display instruments. Together, they form a process control system used for the direct measurement or control of temperatures in various production processes within the temperature range of 0–1800°C. The B-type thermocouple uses high-purity platinum for the negative electrode and a platinum-rhodium alloy for the positive electrode.
hermocouple Type Material Temperature Range Sensitivity @ Error* App.**
(+ & -) Range°C 25°C (77°F)
  (°F) µV/°C
    (µV/°F)
B 70％platinum/ 30％rhodium -50~1750 6 LT:±2.8°C (±5°F) I,O
94％platinum/ 6％rhodium (-60~3200) -3.3 HT:±0.5%
10001~13

Thermocouple Extension & Compensating Wire Features

 Material Composition: Made from alloys that match the thermocouple reference wire in the expected temperature range. For example, K-type thermocouples use chromel and alumel alloys, so the extension wire is also made from chromel-alumel alloys.
Operating Temperature: The rated temperature range of extension wires is lower compared to the thermocouple itself. This allows them to transmit signals from sensors in high-temperature environments to cooler control areas.
Accuracy: Designed to maintain the original voltage-temperature relationship of the thermocouple. Any deviation can lead to errors, making it crucial to select the correct extension wire type.
Insulation: Insulated using materials suitable for the environment, such as PVC, Teflon, or fiberglass, to ensure reliable performance.

Thermocouple Extension & Compensating Wire Applications

Aerospace-Components
 

Aerospace

 
Monitoring engine components.
  
100003267
 

Power plants

 
Measuring temperature in boilers or turbines.
medical-equipment
 

Medical Equipment

 
Transmitting signals from sterilization equipment.
HVAC
 

HVAC systems

 
Connecting sensors to control units.
  

Differences Between Thermocouple Wire and Extension Wire

Feature Thermocouple Wire Extension Wire
Material Same as Thermocouple Alloy Matches only within the specified temperature range
Temp Change High (some types up to 1,700°C) Limited (usually up to 400°C)
Cost Higher Reduced
Purpose Used for temperature sensing Extends the temperature signal to instrumentation

Main Considerations When Choosing Thermocouple Extension Wires

  • Match thermocouple type: The extension wire must correspond to the thermocouple type (e.g., K, J, T).
  • Operating environment: Ensure that the insulation material is suitable for temperature, humidity, or chemical exposure conditions.
    PVC: Flexible, general-purpose.
    Fiberglass: High-temperature resistant.
    PTFE (Teflon): Chemical and moisture resistant.
  • Wire gauge: Heavier gauges are needed for long distances or harsh environments to minimize signal loss.
  • Shielding: For environments with electrical interference, consider using shielded wire.
  • Accuracy: Verify whether the wire meets ASTM or IEC standards for accuracy.
10002~14
Grades Cr10Ni90 Cr20Ni80 Cr30Ni70 Cr15Ni60 Cr20Ni35 Cr20Ni30
Max. Service Temperature (°C) 1300 1200 1250 1150 1100 1100
Melting Point (°C) 1400 1400 1380 1390 1390 1390
Density (g/cm³) 8.7 8.4 8.1 8.2 7.9 7.9
Resistivity at 20℃ (μΩ·m) -- 1.09±0.05 1.18±0.05 1.12±0.05 1.00±0.05 1.04±0.05
Elongation at Rupture (%) ≥20 ≥20 ≥20 ≥20 ≥20 ≥20
Specific Heat (J/g.℃) -- 0.44 0.461 0.494 0.5 0.5
Thermal Conductivity (KJ/m.h.ºC) -- 60.3 45.2 45.2 43.8 43.8
Coefficient of Lines Expansion (α×10⁻⁶/20~1000ºC) -- 18 17 17 19 19
Micrographic Structure -- Austenite Austenite Austenite Austenite Austenite
Magnetic Properties -- Non-magnetic Non-magnetic Non-magnetic Weak magnetic Weak magnetic

Mineral Insulated Thermocouple Cable

Mineral Insulated (MI) cables are high-performance cables designed for extreme environmental conditions. They consist of metal conductors embedded in compressed mineral insulation material (usually magnesium oxide, MgO) and are encased in a metal sheath. MI cables are used in applications requiring high-temperature resistance, fireproofing, or corrosion resistance.
 

MI cable structure

Metal Conductors: Copper, stainless steel, Inconel, or other alloys
Insulation: Magnesium oxide (MgO) is the most common insulating material
Metal Sheath: Provides mechanical protection and shields the internal conductors

Standards and certifications
MI cables meet the following international standards:
● IEC 60702      ● BS 6387      ● NEC

Mineral Insulated Thermocouple Cable Features

High temperature resistance: Can withstand temperatures up to 1,000°C (1,832°F) or higher, depending on the materials used
Fire resistance: MI cables maintain functionality during and after exposure to fire, making them ideal for critical systems such as emergency circuits
Corrosion resistance: When using appropriate sheath materials, MI cables perform well in corrosive environments, including marine and chemical industries
Mechanical strength: Resistant to crushing, bending, and other physical stresses
Longevity: Due to the stability of the materials used, MI cables do not age and are highly durable
Moisture resistance: Compressed MgO has strong resistance to moisture infiltration
10003~14

Mineral Insulated Thermocouple Cable Applications

100003168
 

Industrial processes

 
High-temperature equipment, furnaces, or kilns.
  
fire
 

Fire safety

 
Emergency systems (e.g., fire alarms, smoke exhaust systems, exit lighting).
Chemical&Petrochemical-Processing
 

Oil and gas

 
Pipeline monitoring and wellhead heating.
  
Marine
 

Marine and offshore

 
Corrosion-resistant installations on ships or oil drilling platforms.
100003267
 

Nuclear facilities

 
Radiation-resistant wiring for critical systems.
 
Building-and-infrastructure
 

Building infrastructure

 
Fire-resistant cables for modern skyscrapers and tunnels.

Mineral Insulated Thermocouple Cable Specifications

Low-Voltage MI Cable（0.6/1kV）

Core Cross-Section Area (mm²) Outer Diameter Range (mm) Weight (kg/km)
Single-Core 10-500 15-60 500-4000
Multi-Core 1.5-240 10-50 200-3500

Medium-Voltage MI Cable（6~35kV）

Core Cross-Section Area (mm²) Outer Diameter Range (mm) Weight (kg/km)
Single-Core 50-1000 30-100 2000-8000
Multi-Core 35-500 40-120 2500-9000

High-Voltage MI Cable（≥110kV）

Core Cross-Section Area (mm²) Outer Diameter Range (mm) Weight (kg/km)
Single-Core 200-2000 50-150 5000-15000

Mineral Insulated Thermocouple Cable Performance Parameters

Electrical Performance

Parameter Low-Voltage Cable (0.6/1kV) Medium-Voltage Cable (6~35kV) High-Voltage Cable (110kV Min)
Rated Voltage (U₀/U) 0.6/1 kV 6/10-26/35 kV ≥110 kV
Insulation Resistance (MΩ·km) ≥100 ≥200 ≥500
AC Voltage Withstand (kV) 3.5 21~52 ≥160
DC Resistance of Conductor (Ω/km) Compliance to IEC standards Compliance to IEC standards Compliance to IEC standards

Mechanical Performance

Performance Indicator Steel Tape Armored Steel Wire Armored Aluminum Tape/Stainless Steel Armored
Tensile Strength (N/mm²) 300-500 400-600 150-250
Compression Performance (N) ≥3000 ≥1500 ≥1000
Minimum Bend Radius 6×Cable Outer Diameter 10×Cable Outer Diameter 8×Cable Outer Diameter

Thermal Performance

Working Temperature Range (°C) -40 to +90（Standard Insulation）
Short-Circuit Temperature (5s) (°C) 160~250（depending on material）
Flame Retardant Performance Compliace to IEC 60332 Standard

Production Process of Thermocouple Alloy

DLX Alloy has over 20 years of experience in manufacturing custom Thermocouple Alloys with innovative compositions and forms. Elevate your industrial applications with our comprehensive offerings as a leading Thermocouple Alloy manufacturer. From high-performance wires to tailored alloy designs, we specialize in crafting premium Thermocouple Alloys that embody durability, heat resistance, and superior quality.
  • Ingredients-Strip
    1.Ingredients
  • 2
    2.Smelting
  • 3
    3.Hot-rolling
  • 4
    4.Heat Treatment
     
  • 5
    5.Wire Drawing
  • 6
    6.Heat Treatment Annealing
  • 7
    7.Detecting
  • 8
    8.Packing
FeCrAl-Alloy
Steps DZX Do Time
Confirmation of product parameters and application We confirm the product according to the demand Immediate
Sample customization In stock or confirm OEM/ODM customization Immediate
Production and processing Confirmation of production as well as product testing 7-15 days
Packaging and Transportation Using carton + preservative film + pallet According to the national

How Does DLX ALLOY Control The Quality?

  

 

1.Raw Material Purchase Control

 
Establish long-term co-operation with reputable raw material suppliers to ensure the quality stability of raw materials.
Each batch of raw materials are required to provide quality documents (such as raw material reports, composition test reports, etc.).
Through professional incoming material testing, including chemical equipment composition analysis and mechanical performance testing, to ensure compliance with technical requirements.
 

  

 

2. Production process control

 
On-line inspection of key production nodes, such as dimensional measurement, strength test, etc., to ensure that the products at each stage are qualified.
Real-time monitoring of heat treatment, welding and other processes to ensure that the process parameters meet the design requirements.
 
 
 
 

  

 

3. Finished product quality testing

 
Chemical composition analysis: confirm the product composition by spectral analyser.
Mechanical performance test: including axial, impact, elasticity and other tests.
Non-destructive testing: Ensure that the products are free of cracks, air holes and other defects through scanning, ray testing, magnetic particle or penetration testing.
Appearance testing: check whether the product surface is smooth and free of scratches, rust or other surface defects.

Thermocouple Alloy Wholesale

Thermocouple Alloy for Industrial Heating – Bulk Wholesale Available，we specialize in manufacturing and supplying Thermocouple Alloy products in bulk.Our materials are widely used for electric heating elements, cutting machines, furnace components, and more.For large quantities, we have more discounts.
10004~11

Looking to Purchase in-stock Items? Click Here to Check More

Best-in-Class Thermocouple Alloy Factory

Changzhou DLX Alloy Company was established in 2002 as a professional alloy materials manufacturer. We specialize in the development and production of various metal alloys, including FeCrAl alloys, NiCr alloys, copper-nickel alloys, Inconel alloys, and Hastelloy alloys. These materials can be processed into pipes, pipe fittings, rods, plates, and wires according to your specific needs. Our alloys are widely used in industries such as aerospace, energy, automotive, medical equipment, chemicals, and electronics, receiving consistent praise from our clients.

Our alloy material products have been exported to over 130 countries and regions globally, including South Asia (20%), South America (15%), and Western Europe (15%), establishing long-term cooperation with several international aerospace manufacturers, power companies, and automotive parts suppliers.
100000033

Why Choose DLX Thermocouple Alloy?

One-stop Solution

 
We have established in-depth strategic cooperation with many metal and alloy production bases, covering the product lines from base metals to high-end special alloys.
 
  

Professional R&D Team

 
The company has its own technical research and development team, whose members are senior experts in the field of metal, and we can provide you with exclusive customised metal products according to your specific chemical compositions, special dimensions and specifications.

Full Set of Certification

 
The company has passed a number of international certifications (ISO 9001, CE, RoHS, etc.), to achieve strict control of raw materials, the production process of multi-stage testing and monitoring to ensure that each product can meet customer requirements.
  

Strong Supply Chain Cost Control

 
With years of deep ploughing and accumulation of massive orders, efficient logistics planning and accurate inventory management, significantly compressed purchasing, transport and warehousing costs. Giving dealers more competitive prices and reserving sufficient profit margins; we can flexibly respond to emergency replenishment.

Frequently Asked Questions

Thermocouple Alloy FAQ

Factory FAQ

Contact

Get In Touch

We implement comprehensive quality control at every stage, including raw materials, production processes, and finished products.
Email dlx-group@dlx-alloy.com
Phone 0086-1990 6119 641
Address NO.32 West Taihu Road, Xinbei District, Changzhou, Jiangsu,China
Follow Us
Inquiry
Products
About Us
© COPYRIGHT 2025 CHANGZHOU DLX ALLOY CO., LTD. ALL RIGHTS RESERVED.