The KOBOLD DF series paddle flow sensor offers the variety of seven material combinations, allowing the DF to stand up to virtually any liquid or aggressive chemical. The DF is a compact flow sensor which employs permanent magnets embedded in a rotating paddle wheel. A Hall effect sensor detects the magnet passing and provides an output which is proportional to flowrate. The DF can be equipped with a frequency output, 4-20 mA output, or voltage outputs. The compact size, variety of material combinations and economical price make the DF a perfect flow sensor for industrial or OEM applications.