The Type MP oscillating piston flowmeter is suited for measurement of hazardous fluids used in metals finishing processes such as chromium or cadmium salts, spent plating or pickling solutions and mixed acids. The measured fluid is completely static-sealed from the environment by means of a magnetically coupled output drive. There are no leak-prone through-case shafts, dynamic seals, glands, or stuffing boxes. The oscillating piston and the magnetic drive are the only moving parts, and the measuring mechanism can be replaced in only five minutes using hand tools. Recalibration is not necessary.