Open System Flat-Bed Metal Detector

The Open System Flat Bed metal detector (OSFB) finds its utilization mostly in a production line, placed on one or both sides, on top or/and under a conveyor belt.

The OSFB's particular use is mostly  there where it is a requirement to obtain easy access to the product or conveyor belt.

Different components

The OSFB in general has two main components. The first component, in the illustration, indicated by (A), is the robust designed detection sensor. In some cases sensitivity can be increased by adding a second detection sensor, indicated by (B). The electronics are integrated in a separate control box, as show in the illustration as (C).

Removing contaminated products

When the detection of an unwanted metal occurs, there are many ways to remove the product from the production line. In consultation with the customer, a complete system including a metal detector and rejection mechanism can be provided, but mostly the existing "product removing mechanisms", can be used for this purpose by coupling the OSFB output signal by means of a PLC.

OSFB output signal

Standard the OSFB is sold without a mechanical product rejection mechanism. The output signal is in the form of a low-power relays with open contacts or, on request, a regulated signal of 0 or 4 to 20 mA, 0 to 10 Volts or NPN / PNP. This opens nearly indefinite possibilities in the electronic steering of other mechanisms or equipment in order to remove metal contaminated unwanted products.

In general   

The OSFB can be obtained in almost all sizes and shapes and is in general considerably more affordable than closed system tunnel-shaped metal detectors. If required, the OSFB is available on request up to IP68 water and pressure tight and explosion protected.