Principle of Operation

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

Features

Field Accuracy Calibration
Verification of flowmeter accuracy without flow testing

Versatile Mounting Options
Inline: Flange, MNPT, 37° Flare Tube and more
Insertion: Fixed, Retractable (hot-tap option) and more

Rugged Flow Sensor Construction
All welded construction
Withstands thermal shock
Hermetically sealed

Application

• Gases (air, natural gas, argon)
• Saturated and superheated steam
• Cyrogenic liquids from -320° F (-195°C) (nitrogen, oxygen,carbon dioxide)
• Corrosive Liquids
• Jet Fuel
• Hydraulic oil
• Water