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 proper load cell for your application. I have listed some of the most common found today and their uses.
Single Point – Single point are probably the cheapest and many 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 could also be used in platform scales and industrial weighing systems to offer accurate readings no matter the positioning of the load on the platform, reducing manufacturing costs.
Canister Type – Canister type have been in existence for some time and are generally the business standard for many high capacity, compression applications. Canister type load cells are used for Torque Measurement. This sort of cell includes a button on the top and bottom side and can be utilized 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 numerous advantages over other designs. This sort has the capacity to rock on its mountings to accommodate any misalignment in mounting surfaces whilst still being retained, this too permits limited movement to permit for thermal expansion and contraction along with lift off protection. This sort of cell can also be available as a weighing module kit.
Single Ended Shear Beam – Single ended shear beam are commonly seen in all kinds of floor, platform and shipping scales today and offers an excellent solution for the majority of medium capacity weighing applications. Single ended shear cells have the ability to withstand full capacity side load with no problems causing them to be particularly suitable for weighing systems with mixers, blenders and agitators. This type are incredibly durable but can become costly and cumbersome to mount above 10,000kg. This type of cell is also 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 kind of load cell offers superior accuracy at Compression Load Cell. This type of cell has openings at either end to permit for quick link with shackles, wire rope, D links or some other rigging. Tension link load cells give a rugged design for resistance to side loading.
Torsion Ring – Torsion ring are a relatively recent concept in design and provide an outstanding low profile solution for a variety 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 deliver load for this ring, optimum load introduction is assured and off-axis loads up to 3 or 4 degrees may be tolerated without loss in performance. Proprietary mounting modules, which offer excellent versatility, are now available 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 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 suggestions above have one major flaw; they may be linked to devices via cable. One of the main difficulties with any weighbridge or floor scale is the possibility of damaged cables. Making use of the most advanced technology, wireless, load cells are now being made available and can some day be the industry standard. The suggestions above load cells are actually obtainable in wireless format, although omqzxd 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 Multi Axis Load Cell when found 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 may be attached. This type are utilized in crane scales, hanging scales, hoist scales and a lot tension applications.