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The master load cell is a sensor or a transducer that transforms load or force acting on it into an electronic signal. This electronic signal can be a voltage change, current change or frequency change depending on the type of load cell and circuitry used.

All About Master Load Cell

A load cell works by converting mechanical force into digital values that the user can read and record. The inner working of a load cell differs based on the load cell that you choose. There are hydraulic load cells, pneumatic load cells, and strain gauge load cells. Strain gauge load sensors are the most commonly used among the three. The degree of voltage change is covered to digital reading as weight.  

There are many various types of load cells.

There are various load cell designs in addition to bending beams. This includes for example:

• S Beam Load Cell

• Load cells with column-shaped spring elements for high loads

• Hollow cylindrical load cells for very high loads

• Calibration Load Cell

• S Type Load Cell

• Load Cell Indicator

• Ring torsion load cells

• Shear beam load cells

Resistive load cells work on the principle of piezo-resistivity. When a load/force/stress is applied to the sensor, it changes its resistance. This change in resistance leads to a change in output voltage when an input voltage is applied.

Use of Master Load Cell

A load cell measures mechanical force, mainly the weight of objects. Today, almost all electronic weighing scales use load cells for the measurement of weight. They are widely used because of the accuracy with which they can measure the weight. Load cells find their application in a variety of fields that demand accuracy and precision. There are several classes of load cells, class A, class B, class C & Class D, and with each class, there is a change in both accuracy and capacity. 

Master load cells work on the principle of change of capacitance which is the ability of a system to hold a certain amount of charge when a voltage is applied to it. For common parallel plate capacitors, the capacitance is directly proportional to the amount of overlap of the plates and the dielectric between the plates and inversely proportional to the gap between the plates.

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