Glass Duplex Insulated K Type Thermocouple Wire With Heat-Resistant Inorganic Coating – Ninomiya K-Hh

Features

Duplex-insulated thermocouple wires insulated and sheathed with glass fiber, and coated with heat-resistant inorganic coating to improve heat-resistance and insulation properties. Maximum operating temperature under normal condition is 350℃, and short-time maximum operating temperature under overheating condition is 400℃. K-Hh is improved version of K-H (glass coated thermocouple wire) with higher heat-resistance and insulation-resistance. Color of heat-resistant inorganic coating is natural-colored white. Identification is made by spiraled stripes on the surface appeared after yarning a colored thread, which is described in the Standards Table, together with braiding glass.

Enquiry

Duplex-insulated thermocouple wires insulated and sheathed with glass fiber, and coated with heat-resistant inorganic coating to improve heat-resistance and insulation properties. Maximum operating temperature under normal condition is 350℃, and short-time maximum operating temperature under overheating condition is 400℃. K-Hh is improved version of K-H (glass coated thermocouple wire) with higher heat-resistance and insulation-resistance. Color of heat-resistant inorganic coating is natural-colored white. Identification is made by spiraled stripes on the surface appeared after yarning a colored thread, which is described in the Standards Table, together with braiding glass.

Heat-Resistivity Data of K-Hh

● Heat-resistance property of coating materials

Graph 1 shows heat-resistivity of our new coating materials measured by thermogravimetric analysis and compared with a conventional coating material. Pyrolysis begins at 500℃ for K-Hh and at 300℃ for K-H. The data proves that heat-resistivity of these materials are far more excellent than that of conventional one. Pyrolysis starting points were determined by tangent method using TGA chart.

 

 

Graph 1: Temperature-Weight Change Rate

 

Heat-insulating property

Graph 2 shows changes in insulation resistance of our new coating materials under temperature changes compared with a conventional material. With the inorganic coating material, insulation resistance of K-Hh is high even under temperature at 400℃. This data is measured values for 450 mm. Source of the data is our in-house test result, but any value shown here is not guaranteed.

 

 

 

 

 

 

Graph 2: Temperature-Insulation Resistance

Specification

Standard type
Parts No. Conductor Insulation Parts OD mm Sheath
thickness mm
Finished OD mm Conductor resistance Ω/m Color
OD mm Thickness mm OD mm Insulation Sheath
+
0.32 x1P  K-Hh 0.32 0.3 0.92 0.92×1.84 0.25 1.4×2.3 12.1 Natural +
Red lines
Natural Natural +
Blue lines
0.65 x1P  K-Hh 0.65 0.4 1.45 1.45×2.9 0.25 2.0×3.4 2.95 Natural +
Red lines
Natural Natural +
Blue lines
1.0 x1P  K-Hh 1 0.4 1.8 1.8×3.6 0.25 2.3×4.1 1.25 Natural +
Red lines
Natural Natural +
Blue lines

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