Equipment is described for detecting the position of application of a sealing strip of heat-seal plastic material onto a multilayer web of packaging material for food products advanced along a predetermined path. The packaging material comprises at least 1 base layer for stiffness and strength and 1 or more heat-seal plastic layer. The sealing strip has a 1st longitudinal portion applied onto a longitudinal edge of the web, and a 2nd longitudinal portion projecting laterally from the longitudinal edge. The equipment comprises a light source, configured for irradiating a transversal portion of the web during movement along its path, and a sensor.

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