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Thermocouples
Thermocouples are used in industry for measuring the temperature of gases, liquids or solid surfaces etc., It's usually assembled with indicators, recorders or computers.
A thermocouple consists of two dissimilar metals joined together at one end. When the junction of the two metals be cooled or heated and a voltage is produced that can be correlated back to the temperature.
Chongqing ODE Instrument Co., Ltd providing Thermocouples are manufactured in different combinations of metals. The calibrations are K, N, E.J, T, S, R, B. Each calibration has a different temperature range.
Performance Capabilities
Conductor
material |
Wire Calibration
|
Accuracy |
ClassⅠ |
ClassⅡ |
Accuracy |
Temperature range( ℃ ) |
Accuracy |
Temperature range( ℃ ) |
Ni Cr-Ni Si |
Ｋ |
1.5℃
or
0.4%t |
-40-1000 |
2.5℃
or
0.75%t |
-40-1000 |
Ni Cr Si-Ni Si |
Ｎ |
-40-1100 |
-40-1200 |
NiCr-Konstantan |
Ｅ |
-40-800 |
-40-800 |
Fe-Konstantan |
Ｊ |
-40-750 |
-40-750 |
Cu-Konstantan |
Ｔ |
1℃ or
0.4%t |
-40-350 |
1.5℃ or
0.75%t |
-40-350 |
Pt Rh 10-Pt |
Ｓ |
1℃ or
1+ （ t-1100 ） × 0.003 |
0-1600 |
1.5℃
or
0.25%t |
0-1600 |
PtRh 13-Pt |
Ｒ |
0-1600 |
Pt Rh30-PtRh 6 |
Ｂ |
—— |
—— |
600-1700 |
Mineral Insulated Thermocouple Cable
Chongqing ODE Instrument Co.,Ltd providing mineral insulated thermocouple cables are available in all industry standard diameters (dia. 1mm to dia .16mm ), sheath material (304, 321 310s, 316, , Inconel 600, Hastelloy X,), calibrations (K, N, E, J,T), conductor configuration (simplex, duplex, triplex), Accuracy Class 1 or Class 2.
No |
Sheath Material |
Max.
Temperature |
Description |
1 |
304
321 |
930℃ |
Austenitic stainless acid-proof steel
(Anti-heat, anti-oxidation) |
2 |
316L
316 |
980℃ |
Austenitic stainless acid-proof steel (anti-heat, it resists corrosion from inorganic acid, organic acid, alkali, marine atmosphere.) |
3 |
310s |
1100℃ |
It belongs to Fe series high chrome stainless acid-proof steel (anti-heat, it highly resists the inter-crystalline corrosion under 800℃ air refrigeration conditions, it prevents from oxidation in 1000℃ and 1100℃ .) |
4 |
Incone1600 |
1100℃ |
Nickel base hot-resist anti-erosion alloy (high hot strength superior corrosion & oxidation proof-ness, it strongly resists the corruption from various waste gas, alkali solution, most or ganic acid & compound.) |
5 |
Incoloy800 |
1100℃ |
Nickel base hot-resist anti-erosion alloy high hot strength fine & oxidation & carburization proof-ness, it resists the sulphur erosion . |
6 |
GH3039 |
1200℃ |
Nickel base deforming high temperature alloy (apart from superior anti-corrosion and anti oxidation, it has high calorific intensity, it remains excellent anti-oxidation performance under 1200℃ ) |
2 、 The comparison table of the stainless steel trademarks in different countries
China |
Japan |
USA |
Chemical Composition |
GB |
JIS |
AISI |
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Others |
00Cr18Ni10 |
SUS 304L |
304L |
≤0.03 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.03 |
8-12 |
18-20 |
|
0Cr18Ni9 |
SUS304 |
304 |
≤0.07 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.03 |
8-11 |
17-19 |
|
0Cr18Ni10Ti
1Cr18Ni9Ti |
SUS321 |
321 |
≤0.12 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.03 |
8-11 |
17-19 |
5(C%-0.02)
-0.08 |
00Cr17Ni14Mo2 |
SUS 316L |
316L |
≤0.03 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.03 |
12-15 |
16-18 |
Mo:2-3 |
1Cr18Ni12Mo2Ti |
|
316 |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.03 |
11-14 |
16-19 |
Mo:1.8-2.5 |
0Cr25Ni20
(1Cr25Ni20Si2) |
SUS310s |
310s |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.03 |
19-22 |
24-26 |
Ti: 5C %-0.07 |
|
NCF600 |
INCONEL600 |
≤0.15 |
≤0.50 |
≤1.00 |
≤0.030 |
≤0.015 |
＞ 72 |
14-17 |
Fe:6-10
Cu: ＜ 0 |
|
NCF800 |
INCOLOY800 |
≤1.00 |
≤1.00 |
≤1.50 |
≤0.030 |
≤0.015 |
30-35 |
19-23 |
Fe rest |
GH3030 |
|
|
≤0.12 |
≤0.80 |
≤0.70 |
≤0.03 |
≤0.02 |
rest |
19-22 |
Fe≤1.5 |
GH3039 |
|
|
≤0.08 |
≤0.08 |
≤0.04 |
≤0.02 |
≤0.012 |
rest |
19-22 |
Fe≤3.0 |
Resistance Temperature Detector ( RTD)
Chongqing ODE Instrument Co., Ltd providing Resistance Temperature Detector ( RTD) is a sensor, which operates on the principle that the resistance increases with an increase in temperature at a specific rate. Commonly manufactured using a platinum resistance element. It is more accurate and more linear than thermocouples and generally slower responding.
RTD Performance Capabilities
Resistance Thermometers |
Calibration |
Et value on various temperature spots ( ℃ ) |
R100
/Ro |
-200 |
-100 |
0 |
100 |
200 |
300 |
400 |
500 |
600 |
650 |
Platinum |
Class A |
Pt10 |
0.55 |
0.35 |
0.15 |
0.35 |
0.55 |
0.75 |
0.95 |
1.15 |
1.35 |
1.45 |
1.3850
±0.0005 |
Pt100 |
Class B |
Pt10 |
1.30 |
0.80 |
0.30 |
0.80 |
1.30 |
1.80 |
2.30 |
2.80 |
3.30 |
3.6 |
1.3850
±0.0012 |
Pt100 |
Cu RTD |
|
Cu50 |
1.5 |
0.9 |
0.3 |
0.9 |
1.5 |
2.1 |
|
|
|
|
1.428
±0.002 |
Note: The Tolerances of other calibration may consult the above RTD tolerances scope.
Thermowell
Chongqing ODE Instrument Co., Ltd providing a wide range of both drilled and flanged thermowells. A threaded or flanged closed end tube which is mounted directly to the process or vessel, designed to protect the thermocouple or RTD from the process surroundings to avoid the corrosive fluids, high pressures and high flow velocities.
Our drilled thermowells are typically manufactured from single piece bar-stock without welds. It is available in multiple physical configurations, in a wide variety of materials, and with a choice of bore sizes and mounting threads and flange sizes.
Thermocouple Compensating and Extension Cable
In industrial installations where the recorder and control instruments are located remotely from the thermocouples, compensating cable or extension Cable must be used between the thermocouple and instrument to reduce costs.
Extension cables use the actual thermocouple materials. This is achieved by using cheaper insulations, wider tolerance alloys and thinner conductors. They are produced in multi-stranded forms for ease of installation. Calibration: NX 、 KX 、 EX 、 JX 、 TX
Compensating cables use completely different alloys that happen to exhibit very similar thermo-electric properties up to a limited temperature (usually 250 ℃ ).
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