Abstract: Disclosed is a flow indicator including a tubular body containing a rod and a magnetized orifice member moving along the rod. The rod has a central ridge of greatest cross-sectional area, tapers toward either end and has a rate of taper which increases toward the end. In the repose position, an orifice is in registry with the ridge. The flow indicator detects relatively small flow rates and yet accommodates substantially greater flow rates without "topping out." One embodiment includes a magnetic follower on the outside of the body for coacting with the moving orifice member to indicate bi-directional flow.