A belt scale weighing system measures the material moving along a conveyor and calculates its flow rate and accumulated quantity without stopping the belt. It combines a weighing assembly, load cells, a belt-speed sensor, and an integrator. The basic calculation is belt load in kg/m multiplied by belt speed in m/s, producing a mass flow rate in kg/s. At Wanji, we recommend choosing a system around the conveyor’s structure, material, operating conditions, and required measurement performance—not the indicator alone.
Please visit our website for more information on this topic.
This guide is for plant engineers, project managers, maintenance teams, and procurement professionals evaluating continuous weighing for bulk materials. It covers the working principle, major components, system options, application matching, and practical supplier questions. Use it to prepare a technical specification or compare proposals for a new installation, retrofit, or replacement.
Material on the belt applies a load to a weighing section, which transfers force to load cells. The scale integrator receives the load-cell signal and a speed signal from a sensor connected to the conveyor. By combining these inputs, it calculates instantaneous flow and adds the measured quantity over time to provide a total.
For example, if a conveyor carries 50 kg/m of material at 2 m/s, the calculated flow is 100 kg/s, or 360 t/h. This is an illustrative calculation, not a performance claim or a recommended operating point. Actual readings depend on installation, calibration, belt condition, material distribution, and the design of the selected system.
Belt scales are commonly configured with different numbers of weighed idler sets. A single-idler design may suit applications where installation space and cost are important and the process does not require a more extensive weighing section. Multi-idler designs use a longer weighing span and can be considered where conveyor or process conditions call for additional measurement stability.
Neither configuration is automatically the right choice for every conveyor. The decision should account for belt speed, loading range, material characteristics, conveyor geometry, and the accuracy requirement stated for the project. A supplier should assess the conveyor layout and operating conditions before recommending a configuration.
Common bulk-material applications include aggregates, coal, minerals, cement raw materials, grain, and other materials transported continuously. The scale measures material on the belt; it does not identify the material or correct for uneven feeding by itself. For variable or sticky materials, discuss buildup, carryback, belt tracking, and maintenance access during equipment selection.
For process control, the integrator’s outputs and compatibility with the plant control system may matter as much as the weighing hardware. For inventory or production reporting, clarify how totals are displayed, stored, and transferred to other systems. Specify the intended use clearly, since a system used for process indication may have different requirements from one used for commercial custody transfer.
Provide the supplier with conveyor width, belt speed range, expected minimum and maximum flow, idler spacing, belt construction, and conveyor inclination. Include drawings or photographs showing the proposed scale location and nearby structures. Also describe the material, normal loading pattern, dust or moisture exposure, and any washdown or temperature conditions.
Wanji supply professional and honest service.
State whether you need instantaneous flow, a running total, batch quantities, or signals for automatic process control. Specify the required measurement performance and the conditions under which it must be achieved. Ask the supplier to explain the assumptions behind its proposal, including the influence of belt tension, speed variation, material distribution, and installation quality.
Confirm how the weigh frame will fit the conveyor and whether modifications to idlers or stringers are required. Review load-cell protection, cable routing, grounding, access for maintenance, and the location of the speed sensor. For electronic integration, identify required signal types and communication interfaces before finalizing the integrator configuration.
Request installation guidance, calibration instructions, operating documentation, and a list of recommended inspection tasks. Ask what support is available for commissioning, troubleshooting, and replacement parts. A clear service scope helps prevent gaps between equipment supply and successful operation at the site.
Belt scale pricing depends on the weighing configuration, conveyor dimensions, load-cell and integrator options, environmental protection, communication requirements, and the amount of engineering or site support included. A quote based only on belt width may omit important installation and integration requirements. Provide a complete application specification to make supplier offers more comparable.
Minimum order quantities and lead times vary by supplier, configuration, and current production schedule. Ask whether the quotation covers the weigh frame, sensors, integrator, cables, documentation, and commissioning support, or lists these separately. Confirm the delivery scope, packaging, export documentation, and any site responsibilities in writing before placing an order.
Ask prospective suppliers how they select the weighing arrangement for your conveyor and what information they need to validate the design. Check that their proposal identifies the included components, technical assumptions, installation requirements, and stated performance conditions. Request product documentation and clear answers about calibration, maintenance, support, and spare parts.
At Wanji, we can review your application details and discuss a belt scale weighing system configuration for your project. To support a useful technical and commercial response, share the conveyor drawing, material information, operating range, required outputs, installation environment, and destination country. We can then clarify the proposed scope and the information needed for quotation.
A belt scale weighing system determines material flow by combining belt load and belt speed, then accumulates that flow into a total. Its main elements are the weigh frame, load cells, speed sensor, integrator, and a suitable conveyor installation. The right configuration depends on the application and operating conditions, so system selection should begin with conveyor data and a clearly stated measurement requirement.
Before requesting a quote, document the conveyor layout, material, flow and speed ranges, environmental conditions, desired outputs, and performance expectations. Compare suppliers on technical fit, installation guidance, integration scope, and after-sales support—not price alone. Contact Wanji with these details to discuss a suitable configuration and the next steps for your belt scale project.
For more information, please visit Belt Scale Weighing System.