Load cells come in various shapes, sizes and capacities and are now the industry standard for all sorts of weighing. It can be a bit of a mine field looking for the correct load cell for your application. I have listed many of the most common found today along with their uses.
Single Point – Single point are the cheapest and most popular type on the market today. Due to their price and reliability, they can be found in most types of retail scales, counting scales, medical scales, parcel scales and postal scales. This sort of load cell can also be used in platform scales and industrial weighing systems to supply accurate readings irrespective of the position of the load on the platform, reducing manufacturing costs.
Canister Type – Canister type have existed for a long period and are generally the industry standard for most high capacity, compression applications. Canister type load cells can be used for Torque Transducer. This type of cell includes a button on the top and bottom side and can be used in compression only. Canister type load cells are used 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 has the capacity to rock on its mountings to support any misalignment in mounting surfaces whilst still being retained, this too permits limited movement to enable for thermal expansion and contraction in addition to lift off protection. This kind of cell is also available being a weighing module kit.
Single Ended Shear Beam – Single ended shear beam are generally seen in all kinds of floor, platform and shipping scales today and supplies an ideal solution for many medium capacity weighing applications. Single ended shear cells have the capacity to withstand full capacity side load without any problems making them particularly suitable for weighing systems with mixers, blenders and agitators. This kind are incredibly durable but could become costly and cumbersome to mount above 10,000kg. This kind of cell can also be obtainable in weighing module form.
Tension Link – The tension link are suitable for applications like winching, hanging scales, crane weighing scales and lifting systems. This kind of load cell offers superior accuracy at Button Load Cell. This kind of cell has openings at either end to enable for quick link to shackles, wire rope, D links or other rigging. Tension link load cells offer a rugged design for resistance to side loading.
Torsion Ring – Torsion ring are a relatively recent concept in design and offer an excellent low profile solution for a variety of weighing applications. Unlike standard compression load cells, which can readily suffer from off-axis loading problems, torsion rings are loaded by way of a centrally located annular ring. By using a central floating pin to deliver load to this ring, optimum load introduction is assured and off-axis loads as much as 3 or 4 degrees may be tolerated without loss in performance. Proprietary mounting modules, that offer excellent versatility, are actually available for both process weighing applications and platform scales.
Weighing Modules – Weighing module generally includes a load cell with mounting kit. Many types 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 utilized in tank scales, silo weighing, vessel weighing applications, axle weighing scales, truck weighing, vehicle scales and weighbridges.
Wireless – All of the above have one major flaw; they are linked to devices via cable. One of many problems with any weighbridge or floor scale is the possibility of damaged cables. Utilizing the latest technology, wireless, load cells are actually being provided and may some day become the industry standard. The suggestions above load cells are obtainable in wireless format, although omqzxd technology comes at greatly increased price.
S Type – S type get their name from their shape, being the letter ‘S’. S type load cells provides Multi Axis Load Cell when utilized in either tension or compression and supply superior side load rejection. This kind of cell has two female threaded fixing points, top and bottom were eye bolts or thread rod ends can be attached. This type are used in crane scales, hanging scales, hoist scales and a lot tension applications.