Do you accurately measure the amount of liquid or bulk materials in your containers using a level sensor or by weighing ? While both methods may seem similar, their differences are fundamental, especially in industry where every kilogram counts.
Level measurement: a fast but inaccurate alternative?
Level measurement is a method of measuring the height (level) of a material in a container. It can be performed by:
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ultrasonic ,
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radar ,
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pressure sensor or even a mechanical float .
For example, it is measured that the liquid level has risen by 2 meters - the volume is calculated based on the geometry of the container.
Problem?
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Density inaccuracies : The same volume may weigh differently if the material is denser or foamy.
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Non-uniform container shapes : if the container is non-standard, even a small percentage of error in the upper zone means an error of hundreds of kilograms .
Weighing: This is the only direct and accurate method
When the container rests on the load cells , you get a direct weight , regardless of:
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density,
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bubbling,
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temperature or level.
This is especially important when accuracy is important – whether during storage, dosing or sales.
The main advantages of weighing:
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Accuracy even when product properties change
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No geometry or calibration dependencies on shape
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Ideal for automated systems where the amount of each addition or withdrawal needs to be recorded
When to choose one and when the other?
| Situation | Level measurement | Weighing |
|---|---|---|
| Large quantities, low precision requirements | ✅ Suitable | ❌ Too expensive |
| You need to know the exact mass | ❌ Inaccurate | ✅ Best choice |
| Variable density (e.g. liquid fats) | ❌ False readings | ✅ Always accurate |
| Container open/shapes imprecise | ❌ Doesn't work accurately | ✅ Shape-independent |
| Automated weighing/sales | ❌ Not recommended | ✅ Required |
What do professionals choose?
Companies that care about accuracy, cost control and compliance choose capacity weighing . It is often used for:
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in the food industry (oils, flour, liquids),
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in the chemical industry (reactors, solutions),
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in grain storage facilities (especially when density changes due to humidity).
Want to learn how to implement capacity weighing in your production?
KEMEK Engineering engineers will help you select the right sensors, controllers and automation solutions . From a single tank to complex production lines - we have the experience and solutions.
