Load cells come in many different shapes, sizes and capacities and are now the industry standard for all types of weighing. It can be a bit of a mine field trying to find the correct load cell for the application. I have listed many of the most common found today as well as their uses.
Single Point – Single point are probably the cheapest and most popular type on the market today. Due to their price and reliability, they can be found in most kinds of retail scales, counting scales, medical scales, parcel scales and postal scales. This type of load cell could also be used in platform scales and industrial weighing systems to provide accurate readings regardless of the position of the load on the platform, reducing manufacturing costs.
Canister Type – Canister type have existed for some time and are usually the market standard for most high capacity, compression applications. Canister type load cells can be used as Torque Measurement. This type of cell has a button on the top and bottom side and can be used in compression only. Canister type load cells are utilized 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 kind has the capacity to rock on its mountings to support any misalignment in mounting surfaces whilst still being retained, this permits limited movement to enable for thermal expansion and contraction in addition to lift off protection. This sort of cell is also available being a weighing module kit.
Single Ended Shear Beam – Single ended shear beam are commonly present in all kinds of floor, platform and shipping scales today and supplies a perfect solution for most medium capacity weighing applications. Single ended shear cells are able to withstand full capacity side load with no problems which makes them particularly suitable for weighing systems with mixers, blenders and agitators. This sort are really durable but may become costly and cumbersome to mount above 10,000kg. This type of cell can also be available in weighing module form.
Tension Link – The tension link are compatible with applications like winching, hanging scales, crane weighing scales and lifting systems. This type of load cell offers superior accuracy at Compression Load Cell. This type of cell has openings at either end to allow for quick link with 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 really are a relatively recent concept in design and supply a great low profile solution for a wide range of weighing applications. Unlike standard compression load cells, which may readily have problems with off-axis loading problems, torsion rings are loaded via a centrally located annular ring. Simply by using a central floating pin to deliver load for this ring, optimum load introduction is assured and off-axis loads as much as 3 or 4 degrees can 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 is made up of 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 employed in tank scales, silo weighing, vessel weighing applications, axle weighing scales, truck weighing, vehicle scales and weighbridges.
Wireless – The above have one major flaw; they are linked to devices via cable. One of the primary issues with any weighbridge or floor scale is the possibility of damaged cables. Utilizing the latest technology, wireless, load cells are actually being made available and may one day function as the industry standard. All of the above load cells are now obtainable in wireless format, although omqzxd technology comes at greatly increased price.
S Type – S type obtain their name off their shape, being the letter ‘S’. S type load cells provides Multi Axis Load Cell when utilized in either tension or compression and offer superior side load rejection. This type of cell has two female threaded fixing points, top and bottom were eye bolts or thread rod ends can be attached. This kind are employed in crane scales, hanging scales, hoist scales and a lot tension applications.