The new LMA200PM moisture analyzer from Sartorius sets the standards for this very requirement. Within just 40 to 120 seconds the LMA200PM delivers precise results on the moisture content of the substance tested. The LMA200PM uses the loss-on-drying technique and heats the sample with microwave radiation, which has been proved to be the fastest and most effective drying method, particularly for materials that contain a high proportion of water. At the same time, the LMA200PM's integrated analytical weighing system with a resolution of 0.1 mg ensures unbeatable precision for determining wet and dry weights of the sample, which form the basis for calculation of loss on drying.

To achieve fast measurement times, the sample must absorb a great deal of microwave radiation in a very short time and convert it to thermal energy. This is why the LMA200PM bombards the sample with microwave radiation from two fields located on the floor of the cylindrical sample chamber, directly below the sample. The microwave radiation, in the 2.45 GHz range, is thus focused directly on the sample while the rotation of the sample retainer ensures homogenous distribution of microwave energy in the sample material, eliminating the hot spots and cold spots that can occur with conventional microwave heating units.
Furthermore, the water vapor emitted during drying in the LMA200PM is rapidly conducted away from the sample. This is accomplished by applying the sample material to a glass fiber pad, which allows the water vapor to escape from both the top and the bottom. An exhaust system draws the water vapor out of the sample chamber, thus preventing condensation.