I'm looking for sensor that can measure the viscosity of ER-Fluid in damper when the damper is in work (on-line measurement). Beside that, I want to know the basic idea of the measurement. Thanks for the help and attention. Reiza Zakia M. University Kebangsaan Malaysia __________________________________________________ Do you Yahoo!? Yahoo! Tax Center - File online, calculators, forms, and more http://tax.yahoo.com