Introduction:
K-type thermocouple bare wire is a commonly used thermocouple type,
consisting of K-type thermocouple alloy exposed wires. The alloy
composition of K-type thermocouple is
nickel-chromium/nickel-aluminum, and the common materials are KP
and KN. Type K thermocouple bare wire has a wide operating
temperature range and is typically used in temperatures ranging
from -200°C to 1,370°C.
K-type thermocouple bare wire has many advantages, such as good
linear characteristics, higher sensitivity and lower price.
Nickel-chromium-nickel silicon thermocouple (K-type thermocouple)
is currently the most widely used cheap metal thermocouple in
temperature measurement areas above 500°C, and its usage is the sum
of other metal thermocouples. They are widely used in industry,
especially in temperature measurement and control. K-type
thermocouple bare wire has a fast response speed and is suitable
for applications requiring fast temperature response.
The nominal chemical composition of the positive electrode (KP) is:
Ni:Cr≈90:10
The chemical composition of the negative electrode (KN) is:
Ni:Si≈97:3
Characteristic:
Wide Temperature Range: Type K thermocouple bare wire is suitable
for applications over a wide temperature range, typically measuring
temperatures from -200°C to 1,372°C (-328°F to 2,502°F).
Good linear characteristics: K-type thermocouples have good linear
characteristics within their operating temperature range and can
provide relatively accurate temperature measurements.
High sensitivity: K-type thermocouple has high sensitivity and good
response ability to temperature changes.
Corrosion resistance: K-type thermocouple has good corrosion
resistance and can provide reliable temperature measurement in some
corrosive environments.
Advantage:
Widely used: K-type thermocouple bare wire is widely used in many
industries and fields, including industrial heating, chemical
industry, petroleum, metallurgy, laboratory and scientific
research, etc.
Lower cost: Compared with other types of thermocouples, K-type
thermocouple bare wire has a lower cost and is suitable for
economical and practical temperature measurement needs.
High temperature resistance: K-type thermocouple bare wire can
withstand high temperature environments and provide reliable
temperature measurement and control.
Relevant specific parameters:
Temperature range: -200°C to 1,372°C (-328°F to 2,502°F)
Thermoelectric potential output: approximately 39.4 μV (at standard
temperature difference)
Linear characteristics: has good linear characteristics
Sensitivity: approximately 41 μV/°C
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 |
| ASTM | ANSI | IEC | DIN | BS | NF | JIS | GOST |
| (American Society for Testing and Materials) E 230 | (American National Standard Institute) MC 96.1 | (European Standard by the International Electrotechnical Commission
584)-1/2/3 | (Deutsche Industrie Normen) EN 60584 -1/2 | (British Standards) 4937.1041, EN 60584 - 1/2 | (Norme Française) EN 60584 -1/2 - NFC 42323 - NFC 42324 | (Japanese Industrial Standards) C 1602 - C 1610 | (Unification of the Russian Specifications) 3044 |
| Diameter/mm | Long time Working | Short period Working | | temperature/°C | temperature/°C | | 0.2, 0.3 | 150 | 200 | | 0.5, 0.8 | 200 | 250 | | 1.0, 1.2 | 250 | 300 | | 1.6, 2.0 | 300 | 350 |
|
Using Occastion of Different Thermocouple |
Thermocouple Type | Working Atmosphere | Working Temperature |
Type K | KP | Oxidizing | -200 to +1200℃ |
KN | Inert |
Type N | NP | Oxidizing | -200 to +1200℃ |
NN | Oxidizing |
Type E | EP | Oxidizing | -200 to +900℃ |
EN | Oxidizing |
Type J | JP | Oxidizing(use in high temp) | -40 to +750℃ |
JN | Reducing, Inert, Vacuum |
Type T | TP | Oxidizing,Vacuum | -200 to +350℃ |
TN | Reducing, Vacuum |
Specific application areas:
- Industrial heating and process control: K-type thermocouple bare
wire is used for temperature monitoring and control, and is widely
used in industrial heating equipment, furnace temperatures,
furnaces, and heat treatment processes.
- Petroleum and chemical industry: K-type thermocouple bare wire can
be used in the petroleum and chemical industry to monitor the
temperature of chemical reactors, storage tanks, pipelines and
high-temperature equipment.
- Laboratory and scientific research: K-type thermocouple bare wire
plays an important role in laboratory and scientific research, used
to measure the temperature of experimental equipment, test devices,
samples and laboratory environments.
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Q&A:
Q:What is the temperature range of K-type thermocouple bare wire?
A:Type K thermocouple bare wire typically has a temperature range
between -200°C and 1,372°C.
Q:What are the advantages of K-type thermocouple bare wire?
A:K-type thermocouple bare wire has the advantages of wide
application, lower cost and high temperature resistance.
Q:In what fields are K-type thermocouple bare wires commonly used?
A:K-type thermocouple bare wire is commonly used in industrial
heating and process control, petroleum and chemical industries, as
well as laboratories and scientific research. They are used to
monitor and control temperature in applications such as industrial
heating equipment, chemical reactors, petroleum storage tanks,
experimental equipment, etc.
