Meister Stroemungstechnik presents a series of float equipped flow monitors, particularly suited for monitoring large volume flows. The series WBM-65 was developed for applications, where electrical limit monitoring is required, but monitoring by means of electronic measurement methods is not possible. These flow monitors excel through rapid reaction times, reliability and robustness. For electrical monitoring the piston-shaped floats are equipped with magnets controlling a reed contact attached outside the housing. This contact is installed in a molded switch-gear housing that ensures compliance with protection class IP65 or IP67.