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Sartorius scales have two types of sensors. In the more precise units such as microbalances or analytical balances, a force restoration sensor is used. In lower resolution scales such as bench and floor scales loadcells are used.

The force restoration sensors used by Sartorius are some of the most precise in the world. For example the Cubis 2.7 micro balance can weigh 2.1 g down to 0.1 ug. This equals 2.1 million steps of resolution. In balances such as this an electro magnet counteracts the downward force caused by the item being weighed. The amount of current that magnet requires is translated into the weight. The heavier the object the more current.

The balance is calibrated so that x amount of current equals 2 grams, other adjustments such are made to compensate for temperature changes and linearity.

The load cell based scales such as the Sartorius Combics are similar in technology to a bathroom scale. However the precision of these scales are much higher due to more advanced electronics and loadcell design.

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