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Introduction:
Armored thermocouples are sensor devices commonly used for ambient temperature monitoring and control. It consists of a filament-shaped heat-sensitive element and a protective shell, which is usually composed of a metal sleeve and insulating material. Armored thermocouples are reliable, high-precision sensor devices suitable for monitoring and controlling ambient temperature. It converts temperature changes into electrical signals through the thermoelectric effect and provides a reliable working environment through the protection of the shell. In a variety of industrial and laboratory applications, armored thermocouples play an important role in helping achieve precise temperature measurement and control.
The working principle of armored thermocouples is based on the thermoelectric effect. When a thermal element comes into contact with the environment, it senses temperature changes in the environment. According to the principle of thermoelectric effect, the thermal sensitive element generates a small voltage signal, which is proportional to the ambient temperature. This voltage signal can be transmitted to a temperature measuring instrument or control system through a connecting line for processing and analysis.
The outer shell of an armored thermocouple protects the heat-sensitive element while also providing mechanical strength and corrosion resistance. The housing usually uses a metal casing, such as a stainless steel casing, to protect the heat-sensitive element from physical damage and environmental influences. Insulating materials are used for electrical isolation and protection to ensure the accuracy and stability of the measurement signal.
Armored thermocouples offer many advantages that make them a widely used choice for ambient temperature monitoring and control. It has high precision and stability to provide accurate temperature measurement results. In addition, armored thermocouples have a wide temperature measurement range and can be adapted to different application needs. It also has fast response speed and good linear characteristics, allowing temperature changes to be detected and recorded in time.
Product Features:
Advantage:
Specific applications:
Other relevant knowledge:
Parameter:
Code | Wire Component of the thermocouple | ||
+Positive leg | - Negative Leg | ||
N | Ni-Cr-Si(NP) | Ni-Si-magnesium (NN) | |
K | Ni-Cr(KP) | Ni-Al(Si) (KN) | |
E | Ni-Cr(EP) | Cu-Ni (EN) | |
J | Iron (JP) | Cu-Ni (JN) | |
T | Copper (TP) | Cu-Ni (TN) | |
B | Platinum Rhodium-30% | Platinum Rhodium -6% | |
R | Platinum Rhodium-13% | Platinum | |
S | Platinum Rhodium -10% | Platinum |
Material | Type | Grade | Working temperature (deg) | Tolerance | Standard | |
Long Term | Short Term | |||||
NiCr-NiSi | K | 1 | -40~1100 | -40~1300 | ±1.5 deg | GB/T 2614-1998 |
2 | ±2.5 deg | |||||
NiCr-CuNi | E | 1 | -40~800 | -40~900 | ±1.5 deg | GB/T 4993-1998 |
2 | ±2.5 deg | |||||
Fe-Constantan | J | 1 | -40~600 | -40~800 | ±1.5 deg | GB/T 4994-1998 |
2 | ±2.5 deg | |||||
Cu-CuNi | T | 1 | -200~300 | -200~400 | ±0.5 deg | GB/T 2903-1998 |
Outer Sheath(mm) | core wire Dia.( mm) | Outer Sheath(mm)o core wire Dia.( mm) | Length(m) | |||||
Out Dia | Wall Thickness | K,N,E,J,T Types | S,R,B Types | K,N Types | E,J,T Types | S,R Types | B Types | |
0.5 | 0.05-0.10 | 0.08-0.12 | ... | SS304, SS321, SS316, SS310, INCL600 | SS30, SS32, SS316 | INCL60, INCL800 | INCL60, INCL800 | 500 |
1.0 | 0.10-0.20 | 0.15-0.20 | ... | 300 | ||||
1.5 | 0.15-0.25 | 0.23-0.30 | ... | 200 | ||||
1.6 | 0.16-0.26 | 0.26-0.36 | ... | 200 | ||||
2.0 | 0.25-0.35 | 0.40-0.50 | 0.25-.030 | 180 | ||||
3.0 | 0.38-0.48 | 0.50-0.60 | 0.30-0.40 | 80 | ||||
3.2 | 0.48-0.58 | 0.58-0.68 | 0.30-0.40 | 75 | ||||
4.0 | 0.52-0.62 | 0.60-0.70 | 0.35-0.40 | 70 | ||||
4.8 | 0.73-0.83 | 0.75-0.85 | 0.40-0.45 | 40 | ||||
5.0 | 0.78-0.88 | 0.80-0.90 | 0.40-0.45 | 40 | ||||
6.0 | 0.98-1.08 | 0.90-1.10 | 0.45-0.50 | 30 | ||||
6.4 | 1..05-1.15 | 1.02-1.12 | 0.45-0.50 | 30 | ||||
8.0 | 1.30-1.44 | 1.30-1.40 | 0.45-0.50 | 20 | ||||
12.7 | 1.75-1.90 | 1.95-2.05 | ... | 10 |
Calibration | Tolerance | | |
Special Limits (Grade I) | Standard Limits (Grade II) | Temperature Range (℃) | |
K (Chromel vs Alumel) | ±1.5°C or ±0.4% | ±2.5°C or ±0.75% | -40~1000 |
J (Iron vs Constantan) | -40~750 | ||
E (Chromel vs Constantan) | -40~800 | ||
T (Copper vs Constantan) | ±1°C or ±0.75% | -40~350 |
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Q&A:
Q: What high-temperature industrial scenarios are armored thermocouples suitable for?
Answer: Armored thermocouples are suitable for many high-temperature industrial scenarios, such as metallurgy, chemical industry, electric power, glass manufacturing, etc. They can be used for high-temperature furnace temperature monitoring, smelting process control, high-temperature reactor temperature measurement, etc.
Q: What are the advantages of armored thermocouples over other temperature sensors?
Answer: Compared with other temperature sensors, armored thermocouples have higher high temperature resistance and fast response capabilities. They are suitable for a wider temperature range, especially in high-temperature environments, and can provide high measurement accuracy.
Q: What is the sheath material of armored thermocouples?
Answer: The sheath of armored thermocouples is usually made of corrosion-resistant materials, such as stainless steel or nickel alloy. These materials have good corrosion resistance and mechanical strength, can protect the internal wires of the thermocouple, and can adapt to various harsh environments.