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Load Cell Support and Theory

Proprietary Strain Gages

UNIQUE FORMULATION, MADE IN-HOUSE
Interface load cells are constructed with strain gages manufactured by Interface from a unique proprietary alloy which provides inherently temperature compensated output. They are manufactured in our facility, in order to provide the necessary strict control of the formulation and the forming process.

MATCHED TEMPERATURE

CHARACTERISTICS
The temperature characteristic of the strain gages is adjusted by special processes to exactly match and counteract the temperature characteristic of the modulus of the load cell structural material, thereby providing output which is relatively temperature insensitive. The bridge circuit is simple, reliability is high, and changes in output sensitivity caused by temperature variations are automatically compensated.
By contrast, competitive load cells use strain gage alloys which require the addition of temperature-sensitive resistors in the bridge circuit for compensation, thus reducing reliability. Since the resistors are not in intimate thermal contact with the cells flexure, the dynamic thermal performance, resistance to thermal gradients, and thermal response times are also severely affected.

LONGER FATIGUE LIFE
The Interface strain gage alloy provides significantly greater fatigue life than the widely-used constantan gages used by the competition.

HIGHER OUTPUT
A third advantage of the Interface strain gage is higher output, providing higher signal-to-noise ratio and opportunity for higher resolution in precision measurement applications.