Sensing in Food Checkweighing

Sensing in Food Checkweighing Image

For example, a high-speed checkweighing inspection system is used to analyze ready-to-eat meals for proper quantity, by precisely measuring the weight of each tray with its food content. As the filled trays pass down a conveyor, they pass over the checkweigher. When the tray is centered in position for weighing, a retroreflective sensor is positioned to sense its leading edge and trigger a diverter. The system will allow properly filled trays to proceed in the packaging process, and ejects underfilled or overfilled trays.


Packaged foods are required to go through multiple inspections, and the washdown environments in which they are produced place unique demands on automation equipment.


The EZ-BEAM Q25 retroreflective sensor is ideal for this application. It emits a high-powered beam that will reliably detect any dark object that passes over the scale. If clear objects are to be detected, a Q25 polarized retroreflective model is used. With its IP69K-rated housing, the Q25 is designed to withstand the harsh washdowns required in food applications. Setup is easy; the Q25 has no adjustments. It features advanced diagnostics that warn of marginal sensing conditions due to an unclear lens, minimizing downtime.

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Q25 Series
Q25 Series

A completely epoxy-encapsulated sensor for use in harsh sensing environments, including food and beverage applications.

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