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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)
Ask questions
(0/1,200)
- Q: How can I apply for a purchase invoice?
A: On the checkout page, you can select the option for an invoice and fill in the relevant invoice information. We will provide you with the corresponding invoice according to your request.
- Q: Can I save my payment information for faster checkout?
A: We prioritize the security of your payment information and do not store sensitive payment details on our servers. However, you may have the option to securely save your payment information with trusted third-party payment processors for faster checkout on future orders.
- Q: Do you have a size conversion chart for international customers?
A: Yes, we provide size conversion charts for international customers on our website. These charts help you convert sizes between different measurement systems, ensuring you select the appropriate size for your region. They can usually be found in the product description or on the size guide page.
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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