A low uncertainty calibration class load cell has the following attributes:

• The cell has a high repeatability (or a low repeatability error).

• The linearity curve is well known. It does not have to be highly linear -- it just has to be well known, either as a polynomial curve or a look-up table.

• The cell should have a low hysteresis.

• The cell should have very low creep.

• The cell should have low drift.

• The cell should be calibrated with a low uncertainty, for example with good calibration practices on reliable calibration equipment.

• The readout should be highly accurate and have a good uncertainty.

• The test fixture used should be carefully designed so that it ensures accurate calibration with high repeatability.