Sensors & Transducers


Sensor counts small objects

November 2009 Sensors & Transducers

Banner Engineering’s Small Object Counter consists of a specialised D10 Expert sensor paired with preconfigured PFVCA fibre-optic arrays, creating a two-dimensional sensing field in which objects are readily detected upon breaking any point of the array. This arrangement makes alignment easier and object positioning control less critical than with traditional, single-point emitter and receiver fibre-optic assemblies — assuring reliable, consistent small object counting with response times as fast as 150 microseconds.

Three major features – dynamic event stretcher (DES), Automatic Compensation and Health Mode Alarm – distinguish the Small Object Counter.

DES prevents double-counting translucent gel caps and similar small objects, which may fool alternative sensing solutions. Automatic Compensation allows the sensor to adapt the switching threshold to its environment in realtime. Health Mode Alarm monitors the sensor’s performance and alerts operators when preventative maintenance should be scheduled to ensure reliable operation.

The standard PFCVA fibre assemblies recommended for use with the D10 Small Object Counter will solve many counting applications. The fibbers can also be used as test platforms to learn about application requirements. If the preconfigured PFVCA fibre-optic arrays do not solve a specific application, a custom fibre-optic assembly can be supplied by Banner.

The Small Object Counter is particularly useful in applications such as:

* Pharmaceutical pill, tablet and gel cap counting.

* Agricultural seed counting.

* Process verification.

* Verifying product flow from the nozzle of a chute.

For more information contact Rodney Topham, RET Automation, +27 (0)11 453 2468, [email protected], " www.retautomation.com



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