![]() ![]() Finally, you’ll want to consider the size of your load and the required accuracy of your measurement. You also should consider the location and duration of the measurement, and whether you need a compression or tension load cell. Consider the temperature range in which you are operating (electricity is not affected by temperature in the same way that pressure devices are). Knowing what types of load cells are available, you need to know a few things about your application coming to Hardy Solutions for the right one. A pneumatic load cell is a similar mechanical device that uses a diaphragm filled with air to support the load, and the weight is measured through changes in air pressure. Since this is a mechanical, not an electrical load cell, it is good for outdoor applications when there is a threat of lightning. In this case, the cylinder is filled with oil and the load forces the piston to change the pressure of the oil which can be measured and translated into a measure of weight. These cells tend to be useful in dynamic load measurement such as applications for tension load cells.Ī hydraulic load cell works more like a traditional scale with a piston and cylinder. A piezoelectric load cell works the exact same way, but measures voltage instead of resistance. Is an initial stress required The CFW force washers are significantly flatter in design and are not pre-stressed. The deformation causes a change in eletrical resistance which is then translated to weight. These cells use one to four strain gauges that deform as force is applied to them. The most common type of load cell is the strain gauge load cell. The electronic change can be in voltage, current or frequency, depending on the type of cell, while the pressure change can be measured in a fluid like oil or a gas like air. It does this by converting the force that is acting upon it into a measurable electronic or pressure change. ![]() What is a Load Cell?Ī load cell is a transducer, sensor or other measuring device that measures weight. Hardy Solutions offers a variety of different types of load cells, and choosing the right one for the type of loads you handle is crucial. That equipment will often involve the use of a measuring component called a load cell. The most common types of load cell are pneumatic, hydraulic, and strain gauges. As the force applied to the load cell increases, the electrical signal changes proportionally. Our free whitepaper details the differences between the key technologies on the market.When measuring large loads as part of your storage, shipping or production process, special equipment is needed. A load cell converts a force such as tension, compression, pressure, or torque into an electrical signal that can be measured and standardized. Whether you are looking for an embedded sensor for an OEM application, or you need a force sensor for test and measurement purposes, there are a number of factors to consider in choosing the right technology. Measure static and dynamic tensile and compressive loads with virtually no displacement. Less accurate (±5% full scale) than typical load cellĭoes your product or application require force sensors? Ideal for innovative product design - thin, light weight, low power requirementsĭisadvantages of Piezoresistive Force Sensor Great solution for OEM/Design-in applications Inexpensive signal conditioning electronics Very thin (0.2mm) and flexible construction allows for unobtrusive measurement This compression results in a proportional change in electrical signal, which like the signal of a load cell, can be calibrated to engineering force units. ![]() ![]() The force applied to the sensor compresses two layers of a flexible, printed, piezoresistive ink together. A force sensitive resistor measures a compressive force directly instead of correlating the strain of a beam to force applied. There are other types of force sensors available, such as force sensitive resistors (AKA, piezoresistive force sensors, or touch sensors) which measure force differently. Not a good solution for OEM/Design-in applications They can be hydraulic, pneumatic, or, most commonly, based on strain gauges. A load cell is a type of force sensor that, when connected to appropriate electronics, return a signal proportional to the mechanical force applied to the system. ![]()
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