The Activity meter PET 2000 measures the of the plant available dissolved nutritional salts and thus their activity in the root area. The measurement provides an overview of the nutritional status of soil or substrate. The display is done in g/l (i.e. g of salt per liter substrate). The evaluation of the measured salinity is controlled with the help of the attached Technical Manual. In the horticulture, in the nursery, landscaping, in the public green, in forestry and agriculture as well as in the case of special cultures used this device to ensure and testing already carried out or planned fertilizer measures. The PET 2000 creates the best condition for an optimal culture success.This text is machine translated.