Weighing on a running conveyor belt
MULTIBELT belt scales provide continuous bulk solids measurement in belt conveyor systems for reliable throughput (t/h) and totalizing (t). The scales are designed for demanding industrial environments and support flow rates up to 20,000 t/h with accuracy up to ±0.25% to weigh bulk materials reliably for downstream processing.
Why MULTIBELT
- Continuous bulk solids measurement on belt conveyors
- High performance: suitable for up to 20.000 t/h
- High accuracy: up to ± 0,25%
- Wide range of belt widths supported across multiple variants.
- Rugged design ensures high availability and reliability in industrial applications
- Easy to install, plan and operate – with zero maintenance
- ATEX suitability for hazardous areas
- Quick and easy integration into existing structures
Typical applications
MULTIBELT conveyor belt scales are used for continuous acquisition of flow rates and total quantities. They are particularly useful in applications where robust, repeatable measurements are required in continuously operating belt conveyor systems. To accurately determine material flows, measurement values from load cells are integrated into the process control system via appropriate interfaces. For this purpose, each load cell provides a measurement signal; additional process information can be added as needed.
Common tasks include:
- Throughput and consumption measurement in production plants.
- Accountability of stored and retrieved amounts (inventory/reconciliation).
- Load limit alarm.
- Batching in load‑out stations.
- Legal‑for‑trade weighing (where required).
- Prefeeder control.
How do belt scales work?
A conveyor belt scale determines the weight of the material on a specific section of a conveyor belt using load cells. The sensors are located in the weighing station and measure the force resulting from the belt load converting it into an electrical signal.When required combining it with belt speed measurement to calculate mass flow. For speed measurement, various speed transducers (e.g., friction wheel tachometers) are available as options. Regular calibration of the load cell, weighers, and evaluation unit is recommended to ensure stable measurement quality.
Video MULTIBELT: working principle
Industry use cases
Conveyor belt scales are used in a wide range of industries – anywhere where bulk materials need to be continuously measured or multiple conveyor belts run in parallel.
Common applications include:
- Cement & Building Materials:
Monitor raw meal, clinker, gypsum and additives to improve material balance, stabilize production and enable reliable shift reporting - Steel & Metals:
Track sinter, pellets, coke, fluxes and alloying materials to increase transparency across lines and support consistent furnace charging - Alternative Fuels:
Measure alternative fuel streams on conveyors to support coprocessing targets, document consumption and reduce deviations - Power & Energy:
Control fuel rates for consumption tracking, efficiency optimization and operational reporting in continuously running conveying systems - Mining
Continuous throughput and totalizing on conveyors for production reporting, load-out control, and stockpile reconciliation in demanding, abrasive environments. - Manufacturing (glass & paper)
Reliable conveyor weighing for raw material and additive handling to stabilize feed rates, improve material balance, and support consistent production quality.
Choose the belt scale variant which best matches your accuracy target, belt width and conveyor design:
| Variant | Description | Belt Widths | Accuracy | Flow Rate |
| BEM | Modular single-idler belt scale | 400-1.400mm | ±1.0% of nominal flow rate | up to 4.000 t/h |
| BEP | Single-idler belt scale | 400-1.400mm |
±0.5% of nominal flow rate ±1.0% of actual flow rate |
up to 6.000 t/h |
| BED | Single-idler belt scale for wide conveyor belts | 1.600-2.000 mm |
±0.5% of nominal flow rate ±1.0% of actual flow rate |
up to 15.000 t/h |
| BMP | Multi‑idler belt scale with weighing platform | 500–2.000 mm |
±0.25% of nominal flow rate ±0.5% of actual flow rate |
up to 15.000 t/h |
| 2BMP | Two BMP weighing stations to achieve higher accuracies | 500–1.400 mm | ±0.25% of actual flow rate | up to 15.000 t/h |
| BMC |
Multi‑idler platform belt scale |
500–2.000 mm | ±0.25% of actual flow rate | up to ~20.000 t/h |
Already know what you need? Configure your belt scale.
Need help selecting the right belt scale for you? Contact our experts
Frequently Asked Questions
The achievable accuracy of a belt scale depends on the system design, installation conditions, material characteristics, and calibration quality.
Under stable operating conditions and with proper integration into the conveyor, belt scales can deliver an accuracy of up to 0.25 % of the actual feedrate for process monitoring and throughput control.
However, actual processing performance is influenced by factors such as belt tension, conveyor alignment, load distribution, idler condition, material flow consistency, and external vibration. We would be happy to discuss additional options we can include during installation to ensure the scale is tailored to your application.
To be able to handle your inquiry smoothly and quickly, please provide at least the data below:
- Belt width [mm]
- Flow rate [t/h]
- Belt rise [°]
- Belt speed [m/s]
- Desired accuracy [%]
- Troughing angle [°]
Ideally, please send us our completed belt scale questionnaire.
You can request this from your contact person.
Yes, for both cases we have a suitable belt scale and attachable weigh solution. Please get in contact with your contact person or reach out to us under sales-eu@qlar.com.
MULTIBELT from Qlar combines proven weighing technology with application-specific engineering and long-term operational reliability. Rather than offering a one-size-fits-all solution, we select and configure the belt scale according to the actual conveyor conditions, process requirements, and accuracy targets. This ensures stable measurement performance even in demanding bulk material applications.
Qlar can support customers worldwide at short notice, either through our own service technicians or through our global partner network. This ensures fast and reliable assistance during commissioning, troubleshooting, maintenance, and service cases.
Downloads
Brochures
Data sheets
- INTECONT Satus - Indicator System for Belt Scales
- INTECONT Tersus - Mass flow rate measurement
- INTECONT Tersus - Mass flow rate feeding
- MULTIBELT® Single-Idler Belt Scales
- MULTIBELT Multi-Idler Belt Scales
- Speed Sensor FGA 20RSLE
- Correction system for Scales with variable Conveyor Inclination
- DISOCONT Tersus - Measuring, control and regulation system
We’re there for you
Partnership for us means always being on hand to support you whenever and wherever you need us. With our global network of locations and expert partners, we make sure we are always right by your side.
