The first high capacity load cells designed, back in the mid 50's were what is know today as "Canister" load cells. The design consisted of double diaphragms, which were brazed in place to reduce the effects of side and angular loads. These cells were typically hermetically sealed and very durable. They usually require slide plate assemblies and stay rods to prevent the introduction of additional side loads. These load cells were typically used in motor truck scales, rail road track scales and for tank weighing. Rocker column load cells, shear beams and double ended shear beams have subsequently replaced the need for Canister load cells. Canister load cells have been widely used and there are many thousands still in use. Group Four is in the ideal position to provide replacement units when needed.
Group Four Double Ended Beam designs are basically two single-ended beams back-to-back in a single body to provide low profile solutions. This design is suited for applications such as pediatric scales where 20-inch beams are needed to support the 22-inch weighing surface. In this application two Group Four Double Ended Beams give mechanical strength to the scale's center point and the live end of the beams fitted with scale feet. This design gives needed accuracy from any touch point of the scale. Group Four Double Ended Beams are also used in dialysis scales where high capacity and low profile compete. The Group Four-developed symmetrical design methods are employed in this product line, as well, to provide repeatable and accurate measurements. Another advantage of using the Double Ended Beam is the elimination of extra cables providing some economic advantage to the design. If space and capacity is your problem; Group Four will have the solution.
Another type of load cell pioneered by Group Four engineers is Planar Beams, which are used for weighing systems in the 10 to 400 pound range. They are used in point-of- sale scales in checkout counters, medical applications, UPS scales and a large range of general-purpose bench scales. Group Four's planar designs include a "Winged Beam" which applies electrical and mechanical symmetry techniques which improves non linearity performance to 0.002%; the best in the industry. Group Four is well ahead of the industry with this technology. If your application demands high accuracy and dependability, the Group Four Planar solution is ready for you.
For a number of decades canister load cells were used in large scale weighing applications such as motor truck scales and railroad track scales. Group Four engineering led in the development of rocker column load cells to replace canister load cell technology. Large scales used in trucking, railroads and tank farms suffered from temperature-induced relative expansion and contraction. Canister technology could not eliminate associated reading errors. The Group Four Rocker Column technology eliminates the relative expansion and contraction problem and uses an Error Source Feedback system to overcome canister weaknesses. The basic underlying technology is to allow the scale platform to freely move, or rock, on top of the load cells rather than being rigidly connected, as were the canister load cells. Besides the benefits of weighing accuracy, Group Four Rocker Column Load Cells are designed to use less material and easier to apply sealing technology. Group Four Rocker Column Load Cell capacities range from 20,000 to 300,000 pounds.
Group Four's S-Beam Load Cell designs are perfect for applications where you need large capacities in a tight fit. The key element for this product line is the application of bending or shear beam technology to meet your specific needs. This allows Group Four to build a very small form factor load cell with sterling ruggedness. In multiple load cell applications, calibration can become a heart-renching experience. Not for Group Four Load Cells. We employ a design philosophy of mechanical and electrical symmetry to provide a robust product with impeccable calibration characteristics. Group Four engineers created this symmetrical design approach. Our engineering department understands the need to be economical yet we design with your needs in mind. Therefore, Group Four S-Beam Load Cell designs can be customized for you where ruggedness, capacity and space limitations might cause other companies to punt. We thrive on these challenges.
Group Four's Single-Ended Beam Load Cell family offers a variety of solutions for low profile scale applications. The Group Four engineer-developed symmetrical design system, which takes the agony out of calibration, solves high performance needs. By designing the Single-Ended Beam with mechanical and electrical symmetry, our customers, when the system requires multiple load cells, will find this to be an elegant solution. Our load cells use "corner-adjusted" technology and great know-how in circuit design. A good example of using our know-how involved a railroad track weighing system that took technicians expensive hours to calibrate. Each time a replacement cell was dropped into the system, the recalibration procedure was repeated. Group Four engineers used its Single Ended Load Cell design with corner-adjusted technology to solve the calibration problem not only for initial set-up but also for future replacements. Group Four engineers can customize its Single-Ended Beams to meet your exacting needs where fit limitations are present and high performance is needed.
Group Four doesn't take a "one fit for all" approach to its Single Point Load Cell solutions. Other OEMs will not customize to the extent Group Four can to meet your specific needs. Whether it is customizing the body, sealing options (simple or elegant), material selection, or cable configuration, our engineers will design product to meet your form, fit and function needs. We understand in many cases your application will present very difficult operating conditions. One of our Single Point Load Cell designs is used in a weigh feeder application in very harsh operating conditions but also where space is very limited. This customer calls Group Four's Single Point Load Cells "Battleship Tough". We also employ a triple beam technology, which provides accurate and consistent off-center load readings. That is, Group Four Single Point Load Cells yield the same reading for varying load placement. We understand the systems approach to your measurement needs. We look beyond the load cell to help the customer find the best total solution. We can do this because of our industry-leading engineering know-how dating back to the late 1950's. No matter your problem, find the solution with Group Four. We are "All for One"...you.
Weigh modules are used in a variety of weighing applications including tank, silo, bin, and hopper weight measurement. Simply place a module underneath each leg, calibrate to an instrument, and that structure is now a scale. Call Group four Transducers at 800-419-1444 for all of your weighing and measurement needs.
Load Buttons, Load Pins, and Tension link load cells are all examples of the types of special load cells we get involved in. These are just a few examples of custom load cell products we have designed in the past. We excel at custom designing load cells specifically for your unique application. Just because it has not been done before does not mean we cannot do it. We are designing new products all the time and would love to work with you to give your Company a market advantage.