A position or region in a product passage that lies outside the effective sensing area, allowing a product to pass without sufficient detection.
Also called: sensor dead zone; sensing blind spot; sensor blind area; detection blind zone.
Can a tablet fit through the channel and still miss the sensing area?
Yes. The mechanical passage can be wider than the effective sensing area. Depending on the beam and channel geometry, a tablet may pass through an uncovered region without interrupting an effective beam. Coverage must be assessed for the actual product path.
Coverage depends on the sensing area and the product’s size, shape, transparency and path. Channel width alone does not establish detection coverage. Identify the effective sensing region for the proposed product and configuration.
Treat it as a claim with a stated scope: product dimensions and optical characteristics, the passage configuration, and the positions or orientations assessed. A demonstration limited to a central path does not describe every permitted route through a wider opening. Ask which coverage evidence supports the claim for the intended format.
Keep a spatial gap distinct from a timing limitation or one product obscuring another. On some reflective sensor types, dead zone means a near-lens region; that geometry should not be assumed for a through-beam counting head. Identify the sensing principle before comparing catalogue terms.