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Article | June 30, 1996
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.
Its fast response time is 500 microseconds says the company.
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