What Is a Belt Weigh Scale?
A belt weigh scale is an integrated system that measures the mass flow rate of material on a conveyor belt. It provides real-time data on the amount of product being transported, which can be used for batching, blending, inventory tracking, or process optimization.
How It Works: The Key Components
A typical belt weigh scale system includes:
Load Cells
These are sensors installed beneath the conveyor frame. As material travels over the scale, it applies force to the load cells, which convert this force into an electrical signal proportional to the weight.
Weigh Frame
This is a section of the conveyor—usually a few idler rollers—mounted on the load cells. It supports the belt and measures the actual weight of material on a segment of the belt.
Speed Sensor
Mounted on the conveyor, this sensor tracks the speed (velocity) of the moving belt. Speed is essential to calculate flow rate.
Integrator / Controller
The brain of the system. It receives input from the load cells (weight) and speed sensor (belt velocity) and calculates:
Mass Flow Rate = Weight per Unit Length×Belt Speed
It can also totalize the amount of material that has passed over time.
Benefits of Using a Belt Weigh Scale
- Real-time monitoring of production rates
- Accurate inventory control
- Process optimization through better data
- Reduced waste and overrun costs
- Automation-ready integration with plant control systems
Applications
Belt weigh scales are used across industries like:
- Mining and quarrying (coal, ore)
- Agriculture (grain, feed)
- Cement and building materials
- Food and beverage (sugar, flour)
- Waste management and recycling
Final Thoughts
A belt weigh scale is a vital tool in continuous process industries, offering precision, efficiency, and accountability. With advancements in digital sensors and automation, modern belt scales are more reliable and user-friendly than ever.