Tank & process weighing. Continuous weighing for the process line.
Tank, silo and hopper weighing for process and manufacturing — cement, food processing, chemical batching, oil recovery. The tank card handles continuous weight tracking; shear-beam load cells (Zemic / Kevin / Green Label CZL) carry the load.
A silo at a cement plant.
At a cement-blending plant in Rajasthan, three silos hold the input materials — limestone, gypsum, additive. Each silo sits on four shear-beam compression cells. As material drains into the mixer below, the indicator continuously reports the weight in the silo to the PLC that drives the batching gates. When the silo's weight drops below the threshold, the PLC orders a refill. When the mixer's target dose is reached, the gate closes.
Tank and process weighing isn't about an instant reading — it's about a continuous, drift-free, real-time weight that a control system can rely on for hours. Eagle Weigh's tank-weighing card is firmware-tuned to that workflow: high-rate continuous sampling, configurable filter on noise from mechanical vibration, set-point outputs at programmed thresholds.
Why tank weighing is a continuous-reading problem.
Most weighing is event-based: an item lands on the scale, the reading settles, the slip prints. Tank weighing is continuous: the weight is changing all the time as material flows in or out, and the control system needs a fresh reading every 200 ms. The firmware filters mechanical noise (vibration from pumps, the structure itself, nearby motors) without filtering real change.
The set-point output is what closes the loop. When the tank's weight crosses a programmed threshold (high-fill, mid-empty, target dose), the card fires a digital output that the PLC reads. This is what turns a passive sensor into an active control input.
The tank-weighing stack.
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Tank-weighing card
Continuous-reading firmware with configurable noise-filter, set-point outputs, peak-hold mode.
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Shear-beam compression cells
SESB cells from Zemic (USA), 500 kg to 5 t per cell. 4-cell mount under the vessel base.
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Junction box
4-cell summing box with trim, brass-nickel-plated connectors. Metal cabinet, IP65.
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Indicator + PLC output
Process indicator with digital set-point outputs that wire directly into the plant PLC.
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Set-Point card
For workflows that need 3 or 4 discrete output stages — batch start, mid-fill, target, cut-off.
What tank weighing delivers.
| Spec | Value |
|---|---|
| Sample rate | Up to 2,400 readings per second |
| Filter | Configurable low-pass — adjusts to mechanical environment |
| Set-points | 3 or 4 programmable thresholds with digital outputs |
| Capacity | Vessels from 500 kg total to 50+ tonnes |
| Cell mounting | 4-cell compression (vessel base) or 3-cell tripod (suspension) |
| Connectivity | Digital outputs to PLC · RS232 to SCADA · optional 4–20 mA |
| Compliance | Cell + indicator carry standard industrial calibration certificates |
Where tank weighing ships.
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Cement batching plants
Aggregate, sand and cement silos on a batching line. Set-point output drives the dose-gate.
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Food processing
Liquid-ingredient tanks on a beverage / dairy line. SS cells + hygienic finish.
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Chemical batching
Reactor input tanks. Inert-finished cells, set-point output for the metering pump.
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Oil recovery
Storage tanks at petroleum receiving stations. Continuous level via weight.
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Animal-feed batching
Mixer-input silos for poultry / cattle feed plants. Multi-set-point for dose-by-recipe.
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Grain storage
Bulk storage silos at procurement centres — total contents readable in real time.
Tank-weighing FAQ.
How does the cell handle the weight of the empty tank?
At calibration, we tare out the empty-tank weight. The indicator reads only the contents — the structural mass is invisible to the operator.
What about thermal expansion of the tank structure?
The cells are compensated for ambient temperature. For wide-swing environments (cold-storage tank, outdoor silo in summer), we recommend the temperature-stable cell variants.
Can the set-point output drive a contactor directly?
The digital output is logic-level (5/24 V optoisolated). For motor-contactor switching, route it through a relay — we ship a relay board option.
What about vessel agitation noise?
The firmware filter handles agitator vibration. For very high-frequency noise (high-speed mixers), we adjust the filter at calibration.
How accurate is continuous reading?
Typical accuracy is 0.05% of capacity once calibrated. For higher-accuracy batching (0.01%), we recommend the bench-scale calibration option and an off-line trim cycle.
Weighing a tank, silo or hopper?
Tell us the vessel material, capacity, and whether the workflow is continuous batching or fill-and-empty. We'll quote a tank-weighing stack.