TECHNOLOGY
Load cells are electro-mechanical transducers that translate force or
weight into voltage. This change in voltage produces, in the read-out
instrumentation, a repeatable deflection or indication that can be
calibrated directly in terms of the load applied to the cell.
CONSTRUCTION
Construction of the load cell utilizes all the advantages of bonded foil
strain gages . Sealed within the load cell are sets of matched strain
gages bonded to a high strength element, machined to close tolerances. The
strain gages are electrically connected to form a balanced Wheatstone
bridge and additional compensation resistors are added to the circuit for
maintaining the accuracy of the bridge over a wide temperature range.
OPERATION
The principle of operation depends upon the deflection of the strain gage
filament, creating a change in its resistance, thereby unbalancing the
bridge circuit. As a result, for a given input voltage, the output voltage
of the bridge varies proportionally with the load and the change can be
read on appropriate instrumentation.
QUALITY
When completed, each load cell is individually tested and calibrated. Each
cell must meet or exceed rigid electrical and mechanical performance tests
before it is released for service. Also, every cell is proof tested to its
full rated capacity, and in most instances, to over its rated capacity.
ATTRIBUTES
An important asset of our load cells is their extremely small deflection.
The maximum deflection of standard cells does not exceed .012" at
full load. This plus the fact that these load cells contain no moving
parts, opens unlimited application fields. The inherent compactness of the
cells minimizes installation problems.
The frequency response characteristics of
our load cells are exceptionally good. The relatively low mass, and the
small deflection under load, result in a high frequency response which
emphasizes use of the cells in many services where other transducers
cannot perform.
Only strain gages of the highest quality
are installed and configured by technicians who have undergone our
extensive training program targeting craftsmanship and attention to
detail. To the end user, this means a quality product. All Load Cells /
Force Sensors, and Torque Sensors are supplied with a Calibration
Certificate traceable to NIST |
