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Accuracy: ±2% full scale (±5% FS on FL3607/3707 and FL3845/3945 models)
Repeatability: ±0.25% full scale
Connections: 1/8 FNPT, horizontal
Flow Tube: Borosilicate glass
End Fittings: Anodized aluminum or 316 SS
Side Panels: Aluminum
Valve Orifice: Polyacetal for aluminum models, Kel-F in 316 SS models
O-Rings and Packings: Buna in aluminum models, FKM in 316 SS models
Packings: FKM
Float Stops: PTFE
Max Temperature: 121°C (250°F)
Max Pressure: 200 psig (13.8 bar)
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Reviews
- A
Aaron Magbuhat
May 30, 2025
Omega Flowmeter FL-3940STThis is perfect for the metal roofs we put up.HelpfulUnhelpful - J
John Scheadler
Nov 04, 2024
Omega Flowmeter FL-3940STThis looks like the correct fit.HelpfulUnhelpful - S
Stephen Anderson
Jul 01, 2024
Omega Flowmeter FL-3940STOrdered and received product with ease, checkout was a pleasure.HelpfulUnhelpful - D
Dennis Luchene
Feb 18, 2024
Omega Flowmeter FL-3940STHopefully this product worksHelpfulUnhelpful - A
Anonymous user
Nov 25, 2022
Omega Flowmeter FL-3940STAll was ok! No problems whatsoever.HelpfulUnhelpful
Omega Flowmeter FL-3940ST
✔ In Stock (Can ship in 5-7 days)

Online Support 24/7
12 Months Warranty for New Products
30 Days Money Back Guarantee
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