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 trying to find the multi axis force sensor for the application. I have listed some of the most common found today as well as their uses.
Single Point – Single point are probably the cheapest and a lot popular type on the market today. Due to their price and reliability, they may be found in most kinds of retail scales, counting scales, medical scales, parcel scales and postal scales. This kind of load cell may 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 been around for a long time and are usually the business standard for many high capacity, compression applications. Canister type load cells are used for single and multi-weighing applications. This sort of cell includes a button on the top and bottom side and can be used 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 numerous advantages over other designs. This type has the capacity to rock on its mountings to allow for any misalignment in mounting surfaces whilst still being retained, this too permits limited movement to permit for thermal expansion and contraction as well as lift off protection. This kind of cell is also available being a weighing module kit.
Single Ended Shear Beam – Single ended shear beam are commonly found 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 with no problems which makes them particularly suitable 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 kind of weight 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 kind of cell has openings at either end to enable for convenient link with shackles, wire rope, D links or any other rigging. Tension link load cells offer a rugged design for resistance to side loading.
Torsion Ring – Torsion ring certainly are a fairly new concept in design and offer an outstanding low profile solution for an array of weighing applications. Unlike standard compression load cells, which may readily suffer from off-axis loading problems, torsion rings are loaded via a centrally located annular ring. Simply by using a central floating pin to deliver load to this particular ring, optimum load introduction is assured and off-axis loads as much as 3 or 4 degrees could be tolerated without loss in performance. Proprietary mounting modules, that provide excellent versatility, are designed for both process weighing applications and platform scales.
Weighing Modules – Weighing module generally is made up of load cell with mounting kit. Many types of now come supplied as modules but generally single or double ended shear beam and canister type are 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 main problems with any weighbridge or floor scale is the risk of damaged cables. Making use of the ifegti technology, wireless, load cells are actually being provided and can one day become the industry standard. The suggestions above load cells are now offered in wireless format, even though this technology comes at greatly increased price.
S Type – S type get their name off their shape, being the letter ‘S’. S type load cells can provide an electronic output when utilized in either tension or compression and offer superior side load rejection. This tension load cell has two female threaded fixing points, top and bottom were eye bolts or thread rod ends could be attached. This type are utilized in crane scales, hanging scales, hoist scales and most tension applications.
For more information, technical details and capacities of load cells or industrial weighing scales generally speaking then please click one of the links in this article.