I agree with spectre 7
"Sometimes low tech makes more sense than high tech"
But give the speed measurement manufacturer a chance to make the products better.
Here also an interesting speed/length measurement instrument.
It is called "LDA - Laser-Doppler-Anemometrie" and the manufacturer is the company "VIENCO".
It is developed for the textile industry (threads and yarns) and it is very small. And by the way it is very cheap as every machine element on a textile machine.
Virtual Engineering Concept GmbH
Mr. Rolf Haasen
Bonnenbroicher Straße 11-15
41238 Mönchengladbach
Germany
Tel +49 2166 9906650
Fax +49 2166 9906655
www.vienco.de
Best regards
Juan Carlos Gobzález Villar
www.kabelconsulting.de