Weighing Systems & Scales

Dynamic weighing of bulk solids

Dynamic weighing is essential in many industrial processes that involve managing a continuous variable weight. An example is weighing a product on a conveyor belt. At the point of weighing, the material could be on the weighed section of the belt for only a couple of seconds. Dynamic weighing equipment can be divided into three main categories. These are:

• Discontinuous weighing systems
• Discontinuous totalizing weighers
• In-motion weighing systems

Discontinuous weighing systems

An example of weighing equipment of this type is the process batch weighing systems. These systems range from single weigh vessel systems where each ingredient is weighed sequentially and layered into the weigh hopper to complex weighing systems where ingredients are weighed simultaneously.

Discontinuous totalizing weighers

The equipment used in grain or rice milling is called the in-process weighers. Their primary use is to determine both the short and long-term cumulative weights of a product stream.

In-motion weighing systems

The belt and feeder weighers are part of this category. Conveyor belt systems are used to transport a wide range of powders and granular materials continuously. These kinds of equipment are most commonly used in agricultural, mining, pharmaceutical, and food processing industries.

Static weighing of bulk solids

With static weighing, the goods or products are stationary when being weighed on these scales. Usually, there is sufficient time for the measurement process to stabilize before readings are taken. Examples include floor and hopper scales, platform scales, and bench scales. Static weighing is often time-consuming because the goods are weighed once they are completely stationary. But this produces high levels of accuracy and simplifies the weighing process.

The static weighing accuracy is defined as the ability of the scale to perform its weighing functions within an acceptable tolerance.

Static weighing has been used in many industries, such as the transport and travel industry, food, recycling, waste, check weighing applications, cement and materials, and many more industries.