Load Cell Tank Weighing Calculator
Size the load cells for a weighed tank or silo, and convert the net weight into liquid volume and level for a vertical cylindrical vessel.
- Capacity per cell = (tare + contents) × factor ÷ n = (2,000 + 8,000) × 1.25 ÷ 3 = 4,167 kg
- Net = gross − tare = 4,500 kg; volume = net ÷ ρ; level = volume ÷ A
Weigh Vessel Formulas
Net = gross − tare ; V = net ÷ ρ ; level = V ÷ (π/4 × D²)
The design factor covers uneven load sharing, wind, seismic and impact loads; vendors and company standards set its value (often 1.25 to 1.5). Level conversion assumes a vertical cylindrical vessel with a flat bottom; use the dished heads calculator for other shapes.
Worked example
A 2000 kg tank holding up to 8000 kg on 3 load cells with a 1.25 factor needs 4,167 kg per cell, so 5,000 kg cells. At a gross weight of 6500 kg the net is 4500 kg of water: 4.5 m³ and 1.43 m level in a 2 m vessel.
Frequently Asked Questions
How many load cells should a tank have?
Three cells give a stable plane on round vessels; four are common on rectangular frames. Fewer cells with dummy supports reduce accuracy.
Why add a design factor?
Loads are not shared equally and the vessel sees extra forces from wind, agitators and impact. The factor keeps each cell within its rated range.
How do pipes affect accuracy?
Rigid piping carries part of the load. Use flexible connections, long horizontal runs and supports close to the vessel.
Learn more on the blog
Basics of level measurement
A practical, field focused guide on instrumentationblog.in that explains the theory behind this calculator and how engineers apply it on real plants.
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