The Hedland Flow Meter is a variable area (rotameter) instrument. A precision machined, sharp-edged Orifice is located within the piston assembly and forms an annular opening with the contoured metering cone. The piston assembly carries a cylindrical PPS/ ceramic magnet that is magnetically coupled to an external flow Indicator that moves precisely, in direct response to movement of the piston. A calibrated spring opposes flow in the forward direction. This spring decreases viscosity sensitivity and allows the flow meter to be used in any position, including inverted.

• No electronics needed to obtain a reading
• Can be installed in any position / orientation without affecting accuracy
• The most readable product in its class
• Does not require special plumbing or accessories to stabilize turbulent flow
• Magnetic coupling eliminates the need for mechanical linkages that wear, loosen and leak over the functional life of competitive meters
• Custom scale options to meet exact application requirements

• Direct reading
• Internal calibrated spring
• 360° rotatable guard/scale
• Easier-to-read linear scale
• No flow straighteners or special piping required
• Relatively insensitive to shock and vibration
• Special scales available