Conveyor Belt Scale

A Belt Weigher is an industrial  weighing system used to gauge the mass and/or flow rate of material travelling over a conveyor belt of any length. Conveyor Belt Scales weigh the material and determine the rate at which material travels on a conveyor belt over a specific period of time.

NWS Weight Integrators are installed to monitor the static weight signal from our High Precision Strain Gauge load cells attached to a Scale Idler on the conveyor belt. Once the static weight is measured, our integrator incorporates the weight with the speed (sensed by our Speed encoders) at which the belt is rotating to calculate the rate of mass per time. The integrator provides continuous information about the flow of materials by monitoring the load and speed. This information is continuously displayed on the integrator for real time tracking of products and thus facilitating dynamic weighing.

NEWTON is skilled in providing dedicated services for Conveyor Belt Scales that act as flexible weighing systems providing the accurate data for many businesses, thus allowing for easy and efficient in-motion weighing.

We alsoprovide data of this dynamic weighing system through Cloud Automation and SMS Facilitythat enables remote access of the integrated information of the system.

At NEWTON, we suggest the following for selecting the best Installation Location for the precise weighing on the conveyor:

  • Choose an area with constant Belt tension

Constant belt tension plays a key role. For optimal accuracy of the scale, the tension must remain constant to avoid inaccurate measurements. It is best to install the scale close to the tail section, where tension variations from no load to full load are minimal.

  • Belt Scale not to be installed near the materials loading point

The loading point of materials will generally be turbulent and installing a conveyor belt scale near the loading point can lead to poor performance. For accurate measurements, materials on a conveyor belt should not be weighed before they are completely settled.

We suggest determining the distance of belt length between the loading point and the point at which the belt becomes settled for selecting the location of the scale. Installation of the scale around the head pulley or the tail pulley of the conveyor belt can produce the similar problems. Ideally a scale should be installed at least one conveyor idler away from the point where turbulence stops.

  • A steep incline and locations where the conveyor forms a convex or concave curve is a poor location choice

When a conveyor belt is at an angle of more the 15 degrees, the chances of material roll back increases greatly. A belt scale installed on a steep incline can be weighing the materials multiple times if material roll back is occurring.

Locations where the conveyor belt forms either a convex or a concave curve make for an inappropriate belt scale installation point. This could give rise to problems such as a belt lifting up from the curve preventing a good empty belt zero balance for the scale.

  • Consider vibration & weather

A belt scale is an inherently sensitive device and should be isolated from equipment that can induce harmful or disturbing vibration. Equipment such as crusher, vibratory feeding equipment, bins subject to hammering and hammer mills should be avoided.

Weather conditions with temperatures below -20 degrees C can cause ice and frost build-up on the belt which creates unreliable speed sensing. It is also recommended your conveyor belt scale is in a covered area for outdoor installations.

Salient Features –

  • 100% customization available as per client requirements
  • Accuracy better than +/- 0.20 in ideal situations
  • Robust design weight transmitter for outdoor installations
  • High Precision Load Cells to give you the most accurate weight
  • Modbus and Profibus communication available
  • Confirming to the latest IP standards
  • Remote Data Access facility
  • Heavy Duty mechanical Structures with guaranteeddurability

Components – NWS Weight Transmitter, Strain Gauge Load Cells, High Precision Proximity sensor/encoder, Stainless Steel Junction Box, Robust design Weigh Platform, Remote Display and Totaliser (optional), IOS Switch (Optional) and GSM Modem (Optional)