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12 Months Warranty for New Products
30 Days Money Back Guarantee
Flow Velocity Range:0.05 to 9 mps (0.15 to 30 fps)
Accuracy:±2% FS over calibrated span
Liquid Types: Liquids containing
100 ppm of useful sonic-suspended
reflectors greater than 100 microns
(see page E-4 for details)
MONITOR
Enclosure: NEMA 4X (IP66),
polycarbonate, stainless steel, brass,
plated-steel mounting brackets
Dimensions: 178 H x 146 W x 99 mm D
(7.00 x 5.75 x 3.88")
Power Supply: 115/230 Vac,
50/60 Hz ±15% @ 5 VA max;
12 to 28 Vdc @ 2.5 VA max
Display: 2-line x 8-character LCD;
LED backlighting; top row, 7-segment
18 mm (0.7"); bottom row, 14-segment
9 mm (0.35"); 8-digit rate, 8-digit total
(resettable)
Units: User configured—feet,
gallons, ft3, mil-gal, meters, liters,
mil ft3, m3, mil-liters, acre-feet,
oil barrels (42 gallon), liquor barrels
(32.5 gallons), lb, kg
Rate:
Interval—second, minute, hour, day
Totalizer exponent: E-2 to E+6
Response Time:
User selectable, 1 to 60 seconds
Outputs: 4 to 20 mA, 800 Ω max;
internal or external power supply;
12-bit resolution; optically isolated
Dual Relay: Independently configured;
form “C”, 200 Vac @ 0.5 A resistive; rate
alarm, totalizer pulse, error
Rate Pulse: 2 output types— 500 mVac
or open collector; 2500 Hz max; 12-bit
resolution; 500 mV AC into 2 kΩ min;
open collector 1 A at 100 V max
Multiple Meters: Synchronization provision included—used for multiple meter/
single pipe system; up to
4 meters may be interconnected to
30 m (100') apart
Keypad: 4 pushbutton keys
Operating Temperature: General
purpose, 40 to 85°C (40 to 185°F)
TRANSDUCERS
Type: Compression-mode
ultrasonic, 625 kHz
Housing Material:
Standard Clamp-On: NEMA 6P
(IP68), -40 to 100°C (-40 to 210°F),
CPVC, Ultem®, nylon, PVC (cable
jacket), aluminum (small pipe)
High-Temp Clamp-On:
NEMA 4 (IP65), -40 to 200°C
(-40 to 400°F), Vespel®, anodized
aluminum, nickel-plated brass,PFA (cable jacket)
Doppler Probe: NEMA 6 (IP67)
-40 to 100°C (-40 to 210°F); 700 psi
(48 bar) max, 316 SS, Ultem®
, FKM,
nylon, PVC (cable jacket)
Optional Flexible Armored Conduit:Zinc-plated steel, PVC
Cable Length:
Standard Lengths:6 m (20') standard
Ask questions
(0/1,200)
- Q: Are there free trial or sample giveaway activities?
A: We regularly organize free trials or sample giveaways. You can stay informed about these activities and apply to participate by following our official announcements, emails, or social media channels.
- Q: What payment methods do you accept?
A: We accept various payment methods, including major credit cards (Visa, Mastercard, American Express), debit cards, and digital payment platforms such as PayPal, Apple Pay, and Google Pay. The available payment methods will be displayed during the checkout process.
- Q: Do you have a mobile app for easier shopping?
A: We currently do not support it, but we have a Progressive Web App (PWA) and a well-adapted mobile version of our website. Additionally, we are in the process of developing a mobile application for iOS and Android devices. Our mobile app will provide a convenient and user-friendly shopping experience, including personalized recommendations, easy navigation, and order tracking features.
Reviews
- C
Craig Carter
Jul 30, 2025
Omega Flowmeter FD-420I'm looking forward to seeing if the part fits my AC unit correctly.HelpfulUnhelpful - H
Howard Sanders
Feb 02, 2025
Omega Flowmeter FD-420Arreglaron mi pedido cuando accidentalmente pedí un pedido equivocado. Y aún me lo entregaron a tiempo.HelpfulUnhelpful - C
Christopher Albano
Sep 27, 2024
Omega Flowmeter FD-420Customer was very supportive and delivered the parts with a positive attitude.HelpfulUnhelpful - D
Daniel Washington
Feb 07, 2024
Omega Flowmeter FD-420Great experience, will be back for more.HelpfulUnhelpful - A
Anonymous user
Nov 25, 2022
Omega Flowmeter FD-420All was ok! No problems whatsoever.HelpfulUnhelpful
Omega Flowmeter FD-420
✔ 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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