Load cells come in several shapes, sizes and capacities and are now the industry standard for all sorts of weighing. It may be a bit of a mine field searching for the multi axis force sensor for your application. I have listed some of the most common found today as well as their uses.
Single Point – Single point are some of the cheapest and many popular type on the market today. Because of the price and reliability, they are available in most types of retail scales, counting scales, medical scales, parcel scales and postal scales. This kind of load cell could also be used in platform scales and industrial weighing systems to supply accurate readings regardless of the positioning of the load on the platform, reducing manufacturing costs.
Canister Type – Canister type have existed for a long period and tend to be the business standard for most high capacity, compression applications. Canister type load cells can be used as single and multi-weighing applications. This type of cell features a button on the top and bottom side and can be utilized in compression only. Canister type load cells are employed in tank scales, vessel weighing applications, axle weighing scales, truck weighing, vehicle scales and weighbridges. Canister type load cells offer accurate weighing in harsh environments.
Double Ended Shear Beam – For medium to high capacity applications, the double ended shear beam offers a number of advantages over other designs. This type is able to rock on its mountings to allow for any misalignment in mounting surfaces whilst still being retained, this permits limited movement to permit for thermal expansion and contraction in addition to lift off protection. This sort of cell can also be available as being a weighing module kit.
Single Ended Shear Beam – Single ended shear beam are commonly seen in all types of floor, platform and shipping scales today and provides a perfect solution for the majority of medium capacity weighing applications. Single ended shear cells are able to withstand full capacity side load with no problems which makes them particularly appropriate for weighing systems with mixers, blenders and agitators. This type are extremely durable but could become costly and cumbersome to mount above 10,000kg. This kind of load cell sensor is also obtainable in weighing module form.
Tension Link – The tension link are suitable for applications such as winching, hanging scales, crane weighing scales and lifting systems. This type of load cell offers superior accuracy at high capacity weighing. This sort of cell has openings at either end to allow for quick connection to shackles, wire rope, D links or some other rigging. Tension link load cells provide a rugged design for effectiveness against side loading.
Torsion Ring – Torsion ring are a relatively recent concept in design and offer an outstanding low profile solution for an array of weighing applications. Unlike standard compression load cells, which may readily have problems with off-axis loading problems, torsion rings are loaded by way of a centrally located annular ring. Using a central floating pin to deliver load to this ring, optimum load introduction is assured and off-axis loads approximately 3 or 4 degrees could be tolerated without loss in performance. Proprietary mounting modules, that offer excellent versatility, are now readily available for both process weighing applications and platform scales.
Weighing Modules – Weighing module generally includes a load cell with mounting kit. Various kinds of now come supplied as modules but generally single or double ended shear beam and canister type would be the industry standard. Load cell weighing modules are used in tank scales, silo weighing, vessel weighing applications, axle weighing scales, truck weighing, vehicle scales and weighbridges.
Wireless – The above have one major flaw; these are connected to devices via cable. One of the primary difficulties with any weighbridge or floor scale is the risk of damaged cables. Utilizing the ifegti technology, wireless, load cells are actually being presented and may some day become the industry standard. All of the above load cells are offered in wireless format, although this technology comes at greatly increased price.
S Type – S type have their name using their shape, being the letter ‘S’. S type load cells can provide a digital output when utilized in either tension or compression and offer superior side load rejection. This force transducer has two female threaded fixing points, top and bottom were eye bolts or thread rod ends may be attached. This kind are used in crane scales, hanging scales, hoist scales and most tension applications.
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