Dumbell Shape Alpha Rod

One of the earliest heating element designs, the enlarged cold ends of the Dumbell style element were originally made oversized to increase cold end cross section, lowering electrical resistance, thereby lowering cold end operating temperature. Modern Dumbell Alpha Rod by contrast, employ an advanced technology to keep the terminal ends cool by virtue of the decreased resistivity of the lower resistance cold end material used in the manufacturing process. Oversize cold ends are therefore no longer necessary. the old style resistance ratio was 1:3, whereas the new DB resistance ratio is 1:15. Maximum temperature is 1425 C (2600 F).

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