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Introduction:
Armored thermocouples are a commonly used tool when it comes to temperature measurement and control during metal processing and heat treatment. They are composed of two different metal wires that are wrapped in a protective sleeve to form a sturdy sensor.
Armored thermocouples work based on the thermoelectric effect, which means that when two wires of a thermocouple are connected in metals of different temperatures, a voltage is produced. There is a definite relationship between this voltage and temperature, so the temperature value can be inferred by measuring the voltage.
This type of thermocouple is very useful in the metal processing and heat treatment fields because of their ability to withstand high temperature environments. Whether it is high temperature annealing, melting, quenching or other heat treatment processes, armored thermocouples provide accurate temperature measurements. In addition, they have high response speed and good measurement accuracy, which is very important for applications that require fast response and precise temperature control.
When selecting an armored thermocouple, there are some key factors to consider based on your specific requirements. For example, temperature range is an important consideration because different types of thermocouples are suitable for different temperature ranges. In addition, the material of the protective sleeve is also important, as it needs to be able to withstand high temperatures and chemical attack. Other factors include thermocouple length, diameter, and connector type, which will be selected based on the specific application and installation needs.
All in all, armored thermocouples are reliable, high-temperature-resistant temperature measurement and control tools that are widely used in metal processing and heat treatment processes. By measuring the thermoelectric effect, they provide accurate temperature data to help ensure the quality and stability of metal processing processes.
Product Features:
Advantage:
Specific applications:
Other relevant knowledge:
Armored thermocouples usually consist of two different metal wires, which generate a thermoelectric potential difference based on the thermoelectric effect, and determine the temperature by measuring the thermoelectric potential difference.
The selection of armored thermocouples should be based on specific working conditions and temperature ranges. Different armoring materials are suitable for different working environments and temperature requirements.
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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