Paddle flowmeters – flow-keepers are used to indication of momentary flow of liquid and fluent materials in all industrial branches. The flow meter with the switch SP5 is possible to use as a flow-keeper of pre-set flow level. The flow meter is possible to equip with the switch SP6 and evaluation devices e.g. ECLM, DMK, ERT 50000, PAX-D for continuous indication of momentary flow, or flowed volume with the possibility of analogue output (see catalogues of single equipment).