Load cells come in many different 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 proper load cell for the application. I have listed some of the most common found today as well as their uses.
Single Point – Single point are the cheapest and many popular type on the market today. Because of the price and reliability, they are available in most varieties of retail scales, counting scales, medical scales, parcel scales and postal scales. This kind of load cell can also be used in platform scales and industrial weighing systems to provide accurate readings no matter the positioning of the load on the platform, reducing manufacturing costs.
Canister Type – Canister type have been around for a long period and tend to be the market standard for the majority of high capacity, compression applications. Canister type load cells are used for Rotary Torque Sensor. This kind 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 several advantages over other designs. This type is able to rock on its mountings to support any misalignment in mounting surfaces whilst still being retained, this permits limited movement to allow for thermal expansion and contraction in addition to lift off protection. This sort of cell can also be available being a weighing module kit.
Single Ended Shear Beam – Single ended shear beam are commonly present in all types of floor, platform and shipping scales today and supplies an ideal solution for many medium capacity weighing applications. Single ended shear cells have the ability to withstand full capacity side load without any problems causing them to be particularly appropriate for weighing systems with mixers, blenders and agitators. This kind are extremely durable but could become costly and cumbersome to mount above 10,000kg. This type of cell can also be offered 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 Compression Load Cell. This kind of cell has openings at either end to permit for quick link to shackles, wire rope, D links or any other rigging. Tension link load cells provide a rugged design for potential to deal with side loading.
Torsion Ring – Torsion ring really are a relatively recent concept in design and provide an excellent low profile solution for a wide range of weighing applications. Unlike standard compression load cells, which can readily are afflicted by off-axis loading problems, torsion rings are loaded through a centrally located annular ring. Using a central floating pin to send out load for this ring, optimum load introduction is assured and off-axis loads approximately 3 or 4 degrees may be tolerated without loss in performance. Proprietary mounting modules, that provide excellent versatility, are available for both process weighing applications and platform scales.
Weighing Modules – Weighing module generally consists of a load cell with mounting kit. Various types of now come supplied as modules but generally single or double ended shear beam and canister type are definitely 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 – All of the above have one major flaw; these are connected to devices via cable. One of many issues with any weighbridge or floor scale is the risk of damaged cables. Utilizing the most advanced technology, wireless, load cells are being presented and may 1 day be the industry standard. The suggestions above load cells are actually available in wireless format, although omqzxd technology comes at greatly increased price.
S Type – S type get their name using their shape, being the letter ‘S’. S type load cells can provide Multi Axis Load Cell when found in either tension or compression and supply superior side load rejection. This type of cell has two female threaded fixing points, top and bottom were eye bolts or thread rod ends may be attached. This type are employed in crane scales, hanging scales, hoist scales and many tension applications.