Page 5 - 2019종합카다로그_Thermocouple & RTD

5. Typical resistance of standard thermocouple Non-metallic tubes
Ref : JIS C 1602 * Hoskins unit: /m
Type B R S K E J T N* Material Symbol Operating temp. (℃)
AWG wire Old JIS type PR CA CRC IC CC
dia. (mm) Recrystallized GK-SIC 1,600
28 0.32 6.17 16.43 silicon carbide
24 0.50 1.75 1.47 1.43 6.50 Self-bonded SI-SIC 1,650
22 0.65 2.95 3.56 1.70 1.50 4.08 silicon carbide
18 1.00 1.25 1.50 0.72 0.63 1.62 Clay-bonded Y3-SIC 1,500
14 1.60 0.49 0.59 0.28 0.25 0.64 silicon carbide
11 2.30 0.24 0.28 0.14 0.32 Recrystallized SSA-S 1,600
8 3.20 0.12 0.15 0.07 0.13 alumina
Note. Resistance at 0℃ (Ro) measured between (+) and (-) legs. Mulite HB 1,500

6. Operating and maximum temperature limits 8. Sheathed thermocouple
Wire diameter Operating temp. Maximum limit Sheathed Thermocouple is one sheathed thermocouple
Type
(mm) Limit (℃) (1) (℃) (2) that is composed of a fine gauged metal sheath in which
B 0.50 1,500 1,700 high purity MgO powder is tightly compacted around
R 0.50 1,400 1,600 thermoelement wires.
Sheathed thermocouple has high insulation and pressure
S 0.50 1,400 1,600 resistance. It has also high reliability because of its EMF
0.65 650 850 tolerance falling within the limits stipulated by JIS, ANSI,
1.00 750 950 BS, DIN, etc.
K 1.60 850 1,050
2.30 900 1,100 Features
3.20 1,000 1,200 ¥ • Quick response:
By virtue of its integrated structure composed of
0.65 450 500 thermoelement wires insulating material and a
1.00 500 550 protection tube, one has very quick response to
E 1.60 550 650 temperature change.
2.30 600 750 ¥ • High flexibility and mechanical strength:
3.20 700 800 With its tightly compacted from, sheathed
0.65 400 500 thermocouple has mechanical strength and pliability up
1.00 450 550 to bending radius equal to 2 time of the sheath O.D
J 1.60 500 650 ¥ • Excellent resistance to heat Corrosion and Pressure
As high purity MgO powder is tightly compacted in a
2.30 550 750 heat resistant metal tube, Sheath thermocouple is
3.20 600 750 highly gas-tight, no corrosion from surrounding
0.32 200 250 atmospheres and withstand high pressures up to
0.65 200 250 500 kg / cm².
T 1.00 250 300 ¥ • Wide selection of cable specifications :
1.60 300 350 From very fine gauge of 0.25 mm to 12.7 mm in O.D.
1.60 900 1,100 and up to 300 meters in length are available.
N 2.30 1,100 1,200 Thermoelement wires of 2-pair and 3-pair are also available.
3.20 1,200 1,300
Note : 1. Operating temperature limit means the upper temperature, where
thermocouple can be used continuously in air.
2. Maximum limit means the upper temp, where thermocouple can be
used temporarily owing to inevitable circumstances.
7. Protection tubes
Metallic tubes
Material Operating temp. (℃) Maximum temp. (℃)
304SS 900 1,000
316SS 900 1,000
321SS 900 1,000
310SS 950 1,050
347SS 900 1,000
446SS 1,050 1,125
Inconel 600 1,180 1,250
Inconel 800 870 1,000
Hastelloy-C 1,000 1,100
Hastelloy-B 800 1,100
Titanium Oxi.250 red.1,000
Monel 500 600
Tantalum Oxi.300 red.2,200
A182 F11 565
A182 F22 593

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