![]() 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. 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. Typical non-electronic bathroom scales are a widespread example of a mechanical displacement indicator where the applied weight (force) is indicated by measuring the deflection of springs supporting the load platform, technically a "load cell". The most common types of load cells are pneumatic, hydraulic, and strain gauge types for industrial applications. As the force applied to the load cell increases, the signal changes proportionally. A 25% RE-STOCKING FEE WILL APPLY for refund or to purchase another item/s of a brand different from the original purchase.Instrument which indicates force strengthĪ load cell converts a force such as tension, compression, pressure, or torque into a signal (electrical, pneumatic or hydraulic pressure, or mechanical displacement indicator) that can be measured and standardized.Qualified return item/s will be issued 100% store credit for exchange and/or future purchases of items with the SAME BRAND or made by the same manufacturer.All Sales outside of the US and Canada are final ( NO REFUNDS/RETURNS/EXCHANGE).A 25% RE-STOCKING FEE WILL APPLY for refund or to purchase another item/s of a brand different from the original purchase.Qualified return item/s will be issued 100% store credit for exchange and/or future purchases of items with the SAME BRAND or made by the same manufacturer.Customer will assume responsibility and will pay for shipping item/s for return or exchange.Shipping and handling are non-refundable as well. Any used or opened items such as, but not limited to, accessories, supplies, and consumables are NOT returnable or exchangeable.Only items that are brand new condition with ALL the parts and accessories that came with the box including the original packaging materials will be accepted.Returns from sales within US and Canada will be subject to inspection to determine condition of the item/s.Qualified Returns/Refunds/Exchange SHOULD BE MADE WITHIN (14) DAYS FROM DELIVERY DATE.All Sales outside of the US and Canada are final (NO REFUNDS/RETURNS/EXCHANGE).
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