Density Weighing with High Resolution X-ray Systems

Many of you are familiar with X-ray density weighing or using your X-ray system to estimate how much something weighs – as compared to traditional physical weighing alternatives. X-ray is a preferred approach for a few reasons:

  • Many products are moving too fast on a conveyer to weigh them in a cost-effective manner
  • X-ray enables weight calculations of individual components. With a mechanical scale, only the whole package weight can be measured. With an X-ray system, you can gauge individual components; and ensure this data informs your manufacturing process. If your customer expects a certain number of elements in your package (for example, a specific number of nuts, or a specific number of pickles, at least one maraschino cherry), X-ray inspection gives you the confidence that the correct elements are in the container. Additionally, your container doesn’t end up with one component being twice as much as you need while the other is half as much.

So how does it work?

An intriguing feature of  X-ray systems is that they can identify part of a product and evaluate it (instead of only being able to evaluate the holistic product). When a product is inspected, the X-ray system can discern the individual components (the nuts AND the pickles). Then, the system uses a calibration weight curve that allows it to understand differences in image density. 

This suits many product applications because it gives an accurate range for weighing. And if the weight is extremely beyond the range, the system trips an alarm that indicates that the weight is out of the normal range.  

The inspection is entirely non-contact and extremely reliable. Peco InspX X-ray systems automatically calibrate and “check” themselves; they independently validate that they’re working correctly, with software built into the machine.

The process is straightforward: pass your product through the X-ray System, calibrate the System, and then establish product weights. Our component weighing can be based on a targeted package area. 

Another advantage to density-based weighing: some containers vary in density. A glass container is a good example – some are heavier or lighter. A mechanical processor weighs the entire container with the product inside; then empties and rinses it out; then weighs the container alone. A laborious process, time consuming and wasteful process – and really only suited as a sampling methodology. 

With Peco InspX density-based weighing, you can weigh every container with or without product for an accurate reading. 

Hopefully, this description provided some insight into the power, breadth and capability of our systems. To learn more about our innovative company, please visit our website. We look forward to working with you.