How an Aaliant Strain Gage Target Flowmeter Works

•	Measures flow in terms of dynamic force acting on a fixed body in flow stream
•	Bonded strain gages in a bridge circuit configuration mounted outside the fluid stream translate force into an electrical output (proportional to flow rate squared)

How a Bridge Circuit Works

•	Forces from the fluid flow are transferred from the target to the sensing tube
•	Four interconnected strain gages (attached to the sensing tube two on forward side of flow, two on reverse side of flow) produce a four-active arm, bridge circuit
•	At zero flow, the bridge circuit is balanced and produces zero output·
•	Flow produces strain on the sensing tube
•	The bridge circuit becomes unbalanced, producing an output