Abstract: An armored rotameter capable of accurately measuring low flow rates, the meter including a metal body provided with a bore defining a vertical flow tube having a lower inlet into which a fluid to be metered is admitted and an upper outlet from which the fluid is discharged. Disposed in the flow tube is a float having a guided stem which includes a lateral pin projecting through a slot in the front wall of the meter body, the pin riding up and down the slot as the float moves up and down the tube as a function of flow rate. The pin is coupled to one end of a bar magnet link that is external to the meter body and is swingable about a center pivot, the link being caused to swing to an extent and direction in accordance with float movement. The slot and link are sealed by a pressure plate secured to the front face of the meter body.