Laser measurement sensors.

Four of the company's Selcom laser measurement sensors have been installed at the Vredestein Banden BV tire plant in Enschede, The Netherlands, measuring the thickness of calendered sheet. The tour Selcom SLS 5006/50-RU sensors are mounted in a dual head set up on two tracks on both sides of the calendered sheet to measure the true shape and dimensions of the web. The material measured is fresh and uncured and can be characterized as hot and sticky with a black or shiny surface that evaporates some smoke or fume. Since installing the sensors, accurate and reliable continuous thickness measurements are said to be made for improved quality control. Surface quality of the rollers can also be read from the SSP (Selcom Signal Processor) signal, a measurement not previously possible, according to the company. The sensors consist of a semiconductor laser diode that projects a 0.070 mm (0.0028") spot on the target surface. The measurement range is 6 mm (0.24") and stand-off distance is 50 mm (1.97"). Resolution is 0.0015% of the measuring range. The sensor uses a visible laser light for added safety and easy spot positioning. (LMI Technologies)

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