What is the Smallest Piece of Foreign Object that can be Detected by a Metal Detector?

This answer varies greatly. It is dependent upon the material of the contaminant itself, the speed of the line and the moisture content. The height of the detector head from the line is the most critical variable, as sensitivity decreases as height increases.

How do you Maintain Calibration?

You want to periodically check calibration by passing a known calibration test tool under the unit to check for accuracy. These can be made of ferrous, non-ferrous, or stainless steel, and come in the form of rods, cylinders, balls, whips, cards and more.


How do you Adjust your Metal Detectors?

Machines must be calibrated to the food they are processing and then set to a threshold, determined by the company in regards to the size of the contaminant they want the detector to reject. The type of product passing through the detector (wet or dry), its size, and speed affect the setting. The metal detector manufacturer can assist with calibration setup.

What Happens if you Don’t Test your Calibration?

The metal detector can allow larger pieces of foreign contaminant to get through compared to the threshold setting threatening the finished products safety.

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Other metal detector calibration tools are available upon request. Customized sizes available to meet your application needs.