The average ratio of weight to pressure is then used to calculate the weight of other bales. The average ratio is 1.663. Table 3 is an example based on the average ratio in the example above. The important thing to remember is to place the known weight in the same location on the front-end loader as the commodity being calibrated. Figure 2 shows how such a system could be constructed to be a part of the existing hydraulics of the front-end loader.
Suppliers There are many suppliers of cylinders, gauges, and hydraulic fittings and hoses.
These include auto part stores, farm supply and implement dealers, and specialty suppliers such as industrial hydraulic and pneumatic system installers. When considering what to purchase, keep in mind the range of weight that is being measured and the accuracy desired. The larger the cylinder the more weight capacity, but the larger increment of weight per pound of pressure. For example a 2-inch cylinder, with a pressure capacity of 3000 psi, has the capacity to weigh up to approximately 5,700 lbs. Each pound of pressure will equal approximately 2.36 pounds of weight.