Viscometer Technical Notes [.PDF] TN10354 Serial Communications Menus TN11123 VTX423 and D422 Wiring TN11168 Configuring Hyperterminal TN11169 Serial Port Operations TN11171 Installing the VTX423 Sensor TN11172 Installing the D422 Display Recommended Suppliers Technical References Quality CNC machining www.mackenzie-machine.com  Label printing www.TEKID.com  Prototype and production machining www.grangermachine.com  Topical technical articles http://www.physorg.com/ Free educational technical training videos [high school and college level] http://www.khanacademy.org/ Engineering data www.engineeringtoolbox.com/ Composition and physical properties of alloys http://www.csudh.edu/oliver/chemdata/alloys.htm Electronic component data sheets http://www.datasheetcatalog.com/ O-Ring catalog http://www.macroseal.com/pdf/Parker%20O-rings.pdf