On 9/25/06, John wrote: > Hi Vasile > > The temp and moisure content vary. > > Temp is dependant on the amount of steam being fed into the dryer drum, and > the speed of the machine - both operator set. The moisture content varies > depending on what the product requirement is - budget to luxuary and many > stages inbetween. > > This doesnt mean that it cant be calibrated according to the conditions - it > will just make it a very complex measurement. 20 years ago we've designed 10GHz moisture meters for some similar "sheet" type DUT. There are now on the market complex moisture meters in microwave range measuring three parameters: moisture, temperature and thickness of the material. Thickness is a constant inside the algorithm but could be easily recalibrated for becoming the measuring parameters. I had an advertising issue printed somewhere but probably will be hard to found it now. Vasile -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist