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PIEZO ELECTRIC LOAD CELL PORTABLE

The deflection of the diaphragm affects the airflow through the nozzle as well as the pressure inside the chamber. A pressure gauge is attached to the load cell to measure the pressure inside the cell. Air pressure is applied to one end of the diaphragm and it escapes through the nozzle placed at the bottom of the load cell. The pneumatic load cell is designed to automatically regulate the balancing pressure.

PIEZO ELECTRIC LOAD CELL PORTABLE

Weighpads portable weighpads for the weighing of cars and the measure the center of gravity of planes.

Loadpins used in applications for measuring dynamic, static or hoisting forces.

Onboard load cells used for onboard weighing systems on trucks, tractors and other vehicles.

Spoke Type load cells used in low profile, high precision application.

Ring Torsion load cells used in high accuracy hoppers, silo's, platforms and pallet scales.

Compression load cells used in truck scales, large platform scales, weighbridges and hopper scales.

S-type load cells used in tension applications where you will find static and dynamic loads.

Dual Shear Beam load cells used in truck scales, tank and hopper applications.

Shear Beam load cells used in low profile scale and process applications, available in capacities from 100kg up to 50t.

Bending Beam load cells used in pallet, platform and small hopper scales.

Planar Beam load cells used in low profile solutions where space is limited, like medical scales and retail scales.

Single Point load cells used in small to medium platform scales with platform sizes of 200x200mm up to 1200x1200 mm.

There are several types of strain gauge load cells: V o = ( R 3 R 3 + R 4 − R 2 R 1 + R 2 ) V EX can be easily determined using the equation above. A set of 4 strain gauges set in a specific circuit is an application of a Wheatstone bridge.Ī Wheatstone bridge is a configuration of four balanced resistors with a known excitation voltage applied as shown below: Increasing the number of strain gauges applied collectively magnifies these small changes into something more measurable. Since the change in resistance measured by a single strain gauge is extremely small, it is difficult to accurately measure changes. The strain gauge is attached to a flexible backing enabling it to be easily applied to a load cell, mirroring the minute changes to be measured. The strain gauge compresses, becomes thicker and shorter, and resistance decreases.

Tension force stretches a strain gauge, causing it to get thinner and longer, resulting in an increase in resistance. Compression force does the opposite. The wire or foil in the strain gauge is arranged in a way that, when force is applied in one direction, a linear change in resistance results. When the shape of the strain gauge is altered, a change in its electrical resistance occurs. The change in voltage is proportional to the amount of force applied to the cell, thus the amount of force can be calculated from the load cell's output.Ī strain gauge is constructed of very fine wire, or foil, set up in a grid pattern and attached to a flexible backing. The resulting alteration to the resistance in the strain gauges can be measured as voltage. As the spring element deforms, the strain gauges also change shape. When force is exerted on the load cell, the spring element is slightly deformed, and unless overloaded, always returns to its original shape. This elasticity gives rise to the term "spring element", referring to the body of the load cell. The body is usually made of aluminum, alloy steel, or stainless steel which makes it very sturdy but also minimally elastic. Structurally, a load cell has a metal body to which strain gauges have been secured. It is ideal as it is highly accurate, versatile, and cost-effective. Strain gauge load cells are the kind most often found in industrial settings. 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. A load cell converts a force such as tension, compression, pressure, or torque into an electrical signal that can be measured and standardized.