Thermocouple Thermal Resistance Temperature Sensors

Thermocouple Thermal Resistance Temperature Sensors – Overview

Thermocouple (T/C) Thermocouple sensors are made from two wires. Each wire is a different type of metal. These are then welded together to form a measuring/hot junction. This junction and the wires are usually enclosed in a protective metal tube which is inserted into the medium where the temperature is to be measured. The opposite end of the two wires is also joined, and that point is known as the cold junction. As the temperature at the measuring junction changes, thermal current movement occurs between the hot and cold junctions, generating an electron flow. The measurement of this electron flow can then be referenced to a formula, which converts the reading to °C or °F. The thermal current motion of a thermocouple relates directly to the types of wires used.

RTD platinum resistance: is a sensor whose resistance changes as its temperature changes. The resistance increases as the temperature of the sensor increases. The resistance vs temperature correlation is well established and is repeatable over time. The temperature is measured with the resistance of pure metal wires, and the resistance increases at a fixed ratio as the temperature increases. Resistance thermometers are made of platinum, nickel, or copper – with platinum being more commonly used because of its stability and reproducibility.

Thermocouple thermal resistance temperature sensor specifications and sizes can be customized according to different needs.

Thermocouple Thermal Resistance Temperature Sensors

Description

Thermocouple Thermal Resistance Temperature Sensors | RTD/TC

TC Thermocouple Specifications

Thermocouple type

Wire diameter

Limit of operating temperature

Outer diameter X inner diameter of
the protective tube (Unit : Ø mm)

Mark

Outer diameter(mm)

Commonly used limit

Overheating use limit

Metal protection tube

Non-metal protective tube

B (Platinum Rhodium 30%-Platinum6%)

0.5

1500°C

1700°C

6.8/10/13/15/17

R (Platinum Rhodium13%-Platinum)

0.5

1400°C

1600°C

6.8/10/13/15/17

R (Platinum Rhodium10%-Platinum)

0.5

1400°C

1600°C

6.8/10/13/15/17

+Nickel 90%+Chromium 10%

-Nickel 90%+Manganese 2%

+Aluminum 2%

3.2

1000°C

1200°C

≥15

10/13/15/17

2.3

900°C

1100°C

≥12.7

10/13/15/17

1.6

850°C

1050°C

≥9.5

10/13/15/17

750°C

950°C

≥6.3

10/13/15/17

0.65

650°C

850°C

≥5

10/13/15/17

+Nickel 90%+Chromium 10%

-Copper 55%+Nickel 45%

1.6

550°C

650°C

≥9.5

10/13/15/17

500°C

550°C

≥6.3

10/13/15/17

0.65

450°C

500°C

≥5

10/13/15/17

0.32

300°C

400°C

≥5

10/13/15/17

+High purity iron

-Copper 55%+ Nickel 45%

2.3

550°C

750°C

≥12.7

10/13/15/17

1.6

500°C

650°C

≥9.5

10/13/15/17

450°C

550°C

≥6.3

10/13/15/17

0.65

400°C

500°C

≥5

10/13/15/17

+High purity copper

-Copper 55%+Nickel 45%

1.6

300°C

350°C

≥9.5

250°C

300°C

≥6.3

0.65

200°C

250°C

≥5

0.32

200°C

250°C

≥5

RTD specification table：
Platinum temperature measuring resistor Pt100 temperature-impedance value comparison table

Pt100 Ω(DIN 43760 & JIS-1606)Resistance value Unit : Ω

°C

°F

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

-148

60.25

59.19

52.11

48.00

43.87

39.71

35.53

31.32

27.08

22.80

18.49

100.00

96.09

92.16

88.22

84.27

80.31

76.33

72.33

68.33

64.30

60.25

°C

°F

100

100.00

103.90

107.79

111.67

115.54

119.40

123.24

127.07

130.89

134.70

138.50

100

212

138.50

142.29

146.06

149.82

153.58

157.31

161.04

164.76

168.46

172.16

175.84

200

392

175.84

179.51

183.17

186.82

190.45

194.07

197.69

201.29

204.88

208.45

212.02

300

572

212.02

215.57

219.12

222.65

226.17

229.67

233.17

236.65

240.13

243.59

247.04

400

752

247.04

250.48

253.90

257.32

260.72

264.11

267.49

270.86

274.22

277.56

280.90

500

932

280.90

284.22

287.53

290.83

294.11

297.39

300.65

303.91

307.15

310.38

313.59

600

1112

313.59

316.80

319.99

323.18

326.35

329.51

332.66

335.79

338.92

342.03

345.13

700

1292

345.13

348.22

351.30

354.37

357.42

360.47

363.50

366.52

369.53

372.52

375.51

800

1472

375.51

378.48

381.45

384.40

387.34

390.26

–

Temperature-allowable variation comparison table

Specification

JIS C 1606-89

DIN 43760-79

IEC PUB.751-83

Type (Resistance ratio)

Level

Allowable variation(°C)

Level

Allowable variation(°C)

Level

Allowable variation(°C)

Pt100Ω

±(0.15+0.002|t|)

(R100 / R0=1.3850)

±(0.3+0.005|t|)

JIS C1604

0.15

±(0.15+0.002|t|)

JPt100Ω

(R100 / R0=1.3916)

0.5

±(0.3+0.005|t|)

Thermocouple Thermal Resistance Temperature Sensors| RTD/TC

Thermocouple Thermal Resistance Temperature Sensors | RTD/TC

Thermocouple Thermal Resistance Temperature Sensors | RTD/TC