tomysux - what type of polymer(s) are you interested in determining moisture levels? It has been my experience that handheld moisture analyzers (such as units for determining m% levels in concerte, soil, air, grain, etc.) do not quite fit the plastics applications. This is solely based on the fact that dried resins generally need to have no more than 0.x or 0.0x moisture, based on the manufacturer's spec and your own needs. Handheld units just can't deliver that level of resolution.