Table1 Thermocouple sheath

 
Material Operating Temp.() Maximum Temp.() Features
Recrystallized Silicon Carbide (RSIC) 1,650   Widely used as commom protection tube against heat and corrosion but not recommendable for use in the presence of sulphur or reducing flame.
Nitride Bonded Silicon Carbide(NSIC) 1,550 1,750 Most suitable for use in molten aluminium,reheating.
Siliconized Silicon Carbide(SISIC)   1,380 Recommendable for molten Zinc
99-99.5% Alumina 1,600 1,800 Recommendable for use in molten steel,slag and molten glass,impervious.
85-95% Alumina 1,400-1,500 1,600-1,700 Sintered alumina.Recommendable for use in heating furnace and regenerator,impervious.
 
Al 2 O 3 (%) 85 95 99~99.5
SiO 2 (% ) 12   0.2
Fe 2 O 3 ( %) 0.5   0.05~0.1
Use temperature () 1400 1500 1600
Max temperature () 1600 1700 1800
Rigidity 7   8~9
Bulk density 3.6 3.8 3.7~3.9
Water absorption 0.2 0.2 0.1~0.2
Bending strength in high temperature     2000kg/cm 2
Colour white Pink or yellow yellow-beige

O.D. I.D. LENGTH
6mm 4mm 600mm or 1000mm(COE)
8mm 5mm 600mm or 1000mm(COE)
10mm 7mm 600mm or 1000mm(COE)
12mm 8mm 600mm or 1000mm(COE)
15mm 11mm 600mm or 1000mm(COE)
17mm 13mm 600mm or 1000mm(COE)
20mm 15mm 600mm or 1000mm(COE)
24mm 18mm 600mm or 1000mm(COE)
26mm 20mm 600mm or 1000mm(COE)
 
OUTER INTERNAL LENGTH HOLES
3 mm 1 mm 50mm 2
4 mm 1 mm 50mm 2 or 4
4 mm 0.6 mm 50mm 6
6 mm 2 mm 50mm 2 or 4
8 mm 3 mm 50mm 2 or 4
9mm 3.5mm 50mm 2
10 mm 4 mm 50mm 2
10.5mm 3.5mm 50mm 4
12 mm 4 mm 50mm 2 or 4
12 8(OVAL)mm 4mm 50mm 2
14mm 4mm 50mm 4

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