What are conveyor scales?

Most weighing conveyor systems can check a weight of 15 to 150 items in one minute.

Conveyor scales are mass measuring devices mounted on conveyor belt systems designed to weigh the moving load on the conveyor and return a range of readings such as average load weights and load totals over a given period of time. Scales used in large, flexible belt systems are usually mounted between the rollers on the conveyor frame, between the transport and return legs. Those designed for use on smaller roller conveyors consist of scale units complete with roller sections that are added to existing installations at predetermined points. The scale readings are sent via cables to a controller that assimilates and stores the readings, allowing them to be displayed or printed in real time or at the end of a measurement period.

Conveyors of various descriptions form the backbone of material transport for a large proportion of industries worldwide. In most of these industries, keeping track of how much material is transported through the conveyor system during a given period is a critical part of the operation. It allows operators to access system efficiency data, quantify losses due to spillage or theft, and is often an integral part of many companies’ billing or inventory systems. This information can be accumulated in several ways, with the installation of conveyor scales being one of the most common. These devices weigh conveyor loads in real time as material passes through the scale load cells and are available in models suitable for most conveyor types.

Flexible conveyor belts consist of continuous rubber belts that run on regularly spaced sets of idlers and are generally used for long conveyors that transport loose aggregates such as various ore products. The section of belt at the top of the loop is known as the transport passage, with the lower unloaded section known as the return passage. Conveyor scales designed for this type of conveyor are often configured as idler roller assemblies that include an integral load cell and interface. As the loaded transport operation passes through the load cell, it calculates the weight of the load in real time. Other types are mounted between existing roller sets and feature a separate load cell that presses against the transport path.

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Roller conveyors are generally used inside factories or warehouses and are used to transport loose unit loads. The conveyor scales used on these types of conveyors are generally stand-alone units that include a roller conveyor section of the relevant size. They are placed on the existing conveyor belt, where they become part of the transport chain. Other roller conveyor ranges take the form of standard conveyor frame members that can be added to an existing facility at any point. Both types of transport scales generally feed their outputs to a local or remote station where measurement data is viewed immediately or stored for later use.

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