How a Welkin 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:
Easily Field Modified
Field Accuracy Calibration
Verification of flowmeter accuracy without flow testing
Versatile Mounting Options

Lnine:Flange, MNPT,370 Flare Tube and more
Lnsertion:Fixed, Retractable (hot-tap option)and more
Rugged Flow Sensor Construction
All welded construction
Withstands thermal shock
Hermetically sealed
Corrosion-Resistant Wetted Parts
Stainless Steel
Hastelloy C-276
Llnconel
Long Service Life
Provides years of maintenance-free operation
Offered with a two-year warranty
Bi-directional Flow Option
Accurately measures flow in either direction

Specifications:
Line sizes:1/2"to 60"(15mm to 1500mm)
Operating pressure: up to 10000 psig (690 bar)
Operating temperature: from-320°to 500℉(-195°to 260℃)
Repeatability:±0.15% of rate
Accuracy:±0.5% of rate application dependent
Flow turndown ratio:up to 15:1
Flow range:0.13 gpm to 230000 gpm (0.5 l/min to 52238 m³/hr)
Power required:24 VDC
Power required:24 VDC
Outputs: 4-20Ma DC,HART protocol