If Hardy does not have the right capacity load cell, what should I do?

The Advantage Load Points have two parameters you must understand to make your selection. The parameters are "Operational Overload" and "Safe Overload". The "Operational Overload" of the Advantage Load Points is 150% of rated capacity. This means the HI HLPS4.5K load point can be used for loads up to 5175 pounds by reducing the "Safe Overload" window to 115%. The "Safe Overload" is the maximum weight the load cell can support without being damaged. If the vessel in question does not support a large agitator or is not subjected to large impact loads, it could be recommended that the HI HLPS4.5K Advantage Load Points may be used when a 5K load cell is requested.

For a normal system with agitators, seismic activities, and live bottoms, the total dead and live load should not exceed 100% of the capacity of the load cells. Four 4.5K load cells equal 18,000 lb total recommended capacity. Many times designers recommend a capacity buffer to ensure there is not going to be any damage to the load cell as it approaches maximum load capacity. This is an out dated idea and the modern Advantage load cell is fully capable of being used at the 100% level and not show any signs of damage.

Verify the total scale loading and if there was any buffer factor placed on the total capacity number. You maybe able to use a smaller capacity and realize a better weight resolution.

Seismic requirements may require a higher capacity than just the deadload and liveload calculations.  Always refer this type of question a qualified mechanical engineer.   Additional or structural reinforcement or capacity may be required to meet seismic conditions for your vessel.