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In general, metal electric resistance varies according to temperature changes. Platinum is more linear and carries larger temperature coefficient than most other metals with different relations, and the product therefore is suitable for temperature measurement. In adition, as the platinum carries excellent chemical and physical properties, the product can be used for a long period of time in a stable condition as a temperature measuring resistance element capable of easily and industrially obtaining accurate resistance values. The characteristics have been standardized based on intermational standards, ensuring high-accuracy temperature measurements. |
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The resistance thermometer is composed of resistance elements, internal conductors, insulating tube or insulating powder, protection tubes, terminal heads and other required parts. . |
1.ÀúÇ×¼ÒÀÚ 2.³»ºÎµµ¼± 3.Àý¿¬ 4.º¸È£°ü 5.´ÜÀÚÇÔ
¹× ´ÜÀÚÆÇ 6.ÃëºÎºÎ¼Ó |
1.Resistance
elements
2.Internal lead wire 3.Insulator 4.Protection tube This protectin tube protects resistance elements, and internal wires from surrounding conditions, to which components and terminal heads are connected. As the operating temperature, atmosphere and purposes of the protection tube vary considerably according to the temperature checking places, it is necessary to select materials and shapes which suit conditions.
5.Terminal head and terminal plate
6.Mounting attachment |
Symbol
|
Division
|
Operating terperature range(¢ªC)
|
L
|
Àú¿ÂÇü (For low temperature)
|
-100 ~ + 100
|
M
|
Áß¿ÂÇü(For medium temperature)
|
0 ~ 250
|
H
|
°í¿ÂÇü(For high temperature)
|
0 ~ 400
|
|
|