The WT4 is SICK Optic Electronic's (Eden Prairie, MN) smallest photoelectronic proximity sensor. It measures about 1 sq" and weighs 20 g. The WT4 has a variable scanning distance of 20 to 80 mm (0.788" to 3.152") to allow sensing of any color object against any reflective background.
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The Glass Packaging Institute (Washington, DC) has released Packaging & Marketing 2000 (P&M 2000), a 4-color periodical that offers food and beverage marketers and packagers facts and information while highlighting glass packaging innovations.
The Efficia 400 from Unitrak (Port Hope, Ontario, Canada) is an automated system that delivers bagged liquids or dry goods from f/f/s machines, counts and layers the bags as they're deposited into a set-up case and then discharges the case onto a central delivery conveyor leading to the case sealer.