Thermocouple and Thermocouple Extension Wire
Insulations - Fiberous

Type
Synthetic fiber insulation is bulky because of the heavy application of the fiber. Used for extension grade wire, it can take rough handling. Not for use in conduits. Binder burn-off above 400°F (204°C) Wrapped glass is used only on the single conductors. Usually used on the smaller gage wires because it is easier to strip without fraying. For thermocouple grade wire only. Binder burn-off above 400°F (204°C) Braided glass is used on singles and for all jackets. Glass will not burn at any temperature but will melt if over temperature. Any burn-off is due to binders and colorings. Has very high tensil strength. Binder burn-off above 400°F (204°C) High-Temp glass extends the upper utilization temperature of fiberglass. Although higher in cost it is better suited for the aluminum industry than glass. Used with jacket or as twisted singles. Binder burn-off above 400°F (204°C) Refrasil is a vitreous silica fiber that is higher in cost than High-Temp glass. Not as strong as glass but is utilized at higher temperatures. The FEP sizing can leave a residue when burned off under vacuum or restrictive atmospheres. Ceramic fiber is designed for extreme temperature applications. Extremely high in cost. Should not be used in closed tubes. Has an abrasive feel when handling. Use appropriate protection when handling.
Flexibility
Good
Good
Good
Good
Good
Good
Moisture Resistance
Fair
Fair
Fair
Fair
Fair
Fair
Abrasion Resistance
Good
Fair
Fair
Fair
Fair
Fair
ANSI/ASTM Color Code
Yes
Yes
Yes
Yes by Tracer
No
No
Temperature Rating Continuous
500°F (260°C)
900°F (482°C)
900°F (482°C)
1300°F (704°C)
1600°F (871°C)
2200°F (1205°C)
Single Reading
650°F (343°C)
1000°F(538°C)
1000°F (538°C)
1600°F (871°C)
2000°F (1093°C)
2400°F (1315°C)
Mfg. Method
Braided
Silicone Binder
Wrapped
Silicone Binder
Braided
Silicone Binder
Braided
Silicone Binder
Braided
FEP Sizing
Braided
Description
Synthetic
Fiber
Fiberglass
Fiberglass
High-Temp
Fiberglass
Refrasil
Silica Fiber
Ceramic
Fiber
Insulation Code
S
W
G
H
R
C
 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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