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Low Flow Indicating Paddlewheel Flow Meter

Micro-flow meter

$432.75

Item# FTB321D


Please contact Technical Sales Team for assistance. Any remaining stock is available for purchase

Only 15 left

Limited Stock
Micro-flow meter FTB321D FTB321D
  • NEMA 4X (IP56) Enclosure
  • 6-Digit LCD
  • Displays both Rate and Total
  • Non-Volatile Programming and Total

FTB321D Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

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Flow Range
Output Signal
Supply Power
Process Connection Size
Display
Category
Accuracy
Max Process Temperature
Max Operating Pressure
Wetted Materials
Process Connection Type


The FTB300 Series of digital paddle wheels are an economical choice for low flow rate applications. They use Infra-red light beam technology. Available connections include 1/8 FNPT, 1/4 FNPT and 3/8" OD tube fittings. Six available flow ranges as low as 30ml/min to 7000 ml/min. No display models have a 5 Vdc current sinking pulse output. Units with displays have a 6-digit LCD, with up to 4 decimal positions that display both flow rate and total. All units include an open collector alarm output.

User selectable scale factors include: flow units, gallons, liters, ounces, and milliliters. Time units include: minutes, hours, days. Users can also program custom units. Programming values and total are stored in the non-volitile memory. The total reset function can also be disabled. Standard units have a clear PVC viewing lens, PVDF chemical resistant lens are available as an option. The enclosure is a weather resistant Valox PBT and rated NEMA 4X (IP56).

SPECIFICATIONS
Max Working Pressure:
    PVC Lens: 9 bar (130 psig) at 21°C (70°F)
    PVDF Lens ("-PVDF" Option): 150 psig (10 bar) @ 21°C (70°F)
Max Fluid Temperature:
    PVC Lens, FNPT Connectors: 54°C (130°F) at 0 PSI
    PVDF Lens ("-PVDF" Option), Tubing Connectors: 93°C (200°F) at 0 PSI
Full Scale Accuracy: ±6%
Input Power Requirement: 9 to 28 Vdc
Sensor Type: Infrared light beam
Alarm Output: Open collector 30 Vdc max
Enclosure: NEMA 4X (IP56)
Approximate Shipping Wt: 0.45 kg (1 lb) Materials of Construction
Body, Paddle, Axle Material: PVDF Connector Material
FNPT Connections: PVC
Tubing Connectors: PVDF Viewing Lens Material Option
    Clear See Through: PVC
    Opaque Chemical Resistant: PVDF (optional)
O-Ring Seals: FKM (EPDM optional)
Compression Seal to Pump: PVC Sensor Only
    Models: 5 Vdc digital square wave (2-wire)
    Output: 3-wire shielded cable, 1.8 m (6')

Model with Display Model without Display Range
1/8 FNPT 1/4 FNPT 3/8" OD Tube 1/8 FNPT 1/4 FNPT 3/8" OD Tube lpm gph
FTB311D FTB321D FTB331D FTB311 FTB321 FTB331 0.03 to 0.3 0.48 to 4.7
FTB312D FTB322D FTB332D FTB312 FTB322 FTB332 0.1 to 1 1.6 to 15.8
FTB313D FTB323D FTB333D FTB313 FTB323 FTB333 0.2 to 2 3.2 to 31.7
FTB314D FTB324D FTB334D FTB314 FTB324 FTB334 0.3 to 3 4.8 to 48
FTB315D FTB325D FTB335D FTB315 FTB325 FTB335 0.5 to 5 7.9 to 79
FTB316D FTB326D FTB336D FTB316 FTB326 FTB336 0.7 to 7 11.1 to 111
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Rated 5 out of 5 by from Great little flow meter We purchased this flow meter for a test project and we really loved the ease of use and accuracy. Would definitely recommend this product to others.
Date published: 2015-11-24
Rated 5 out of 5 by from Right Tool for the Job. Bought this, received fast, fairly priced, and the perfect tool for my needs.
Date published: 2016-04-29
Rated 1 out of 5 by from Fittings don't fit The fittings that came with the flow meter did not actually fit. And they only sent one. We have been in contact with Omega for several weeks now trying to fix the issue and it has not been resolved.
Date published: 2021-03-11
Rated 4 out of 5 by from Great product Good and precise flow meter, in addition, should have a hard reset switch, in case of the error
Date published: 2016-10-10
Rated 5 out of 5 by from Great product and easy to order Ordering was very easy and I received confirmation of the order quickly
Date published: 2023-05-03
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loading all QA

What are the dimensions for this part, with and without the LCD screen?

Asked by: LGooge
Thank you for your inquiry. It would be best to compose an email and forward to flow@omega.com and will have our design team provide the information for this microflow meter.
Answered by: Application Engineer JC
Date published: 2020-02-19

Hello, I am considering buying some of FTB300 series water meters (the FTB314) - will the pulse from this water meter work with a state data logger (eg. HOBO State Data Logger)? Thanks!

Asked by: DrT13
Thank you for your inquiry about the flow meter. It has a frequency pulse output which is accepted by many instrumentation devices that accepts this signal. As for the data logger, you will neeed to verify the types of inputs.
Answered by: Application Engineer JC
Date published: 2022-11-21

The flowmeter stopped working after 4 months installed in a pressure manifold. The sensor had continuous power during the time, the failure was found on the infrared sensor once the flowmeter was replaced. What is the life expectancy of the sensor?

Asked by: Rvasques
Thanks for your question. The life expectancy of the flow meter depends on the each individual application. Customers have this flow meter after 3 years and still working while others fail after 4 months. Send us an email or call us with more details of your application.
Answered by: ASE HPO
Date published: 2019-11-09

Why is there a difference of total volume between the data calculated from the Lab view and the reading on the screen?

Asked by: dfse
Thank you for your inquiry. Please e-mail flow@omega.com and our Flow Engineers can help you with this concern.
Answered by: AS Engineer
Date published: 2021-01-08

Is there an wiring schematic for the flow meter itself, instead of just the strainer that's in the manual? I'd like to output the signal to another unit if that's possible.

Asked by: alexjlove
We can send a copy of the wire schematic for this flow meter, please send that request to flow@omega.com which would be much appreciated. Thank you.
Answered by: Application Engineer JC
Date published: 2019-11-16

I have 3 questions. - Is it possible to measure the flow in reverse direction? - How long is the period at which data is recorded? - What is the resolution of model number FTB311D? Thank you!

Asked by: khan25
Thank you for your inquiry. Please email flow@omega.com and our Flow Engineers will be able to provide any additional information you need.
Answered by: AS Engineer
Date published: 2021-01-08

Is the pulse output need to have power on the + side before the resistor or that wire is the return + signal? Can we put that 5V signal on a relay or we are better of with the alarm system

Asked by: bobby10
Thank you for your inquiry about the flow meter. Yes, it requires power from 5 to 30 VDC.
Answered by: Application Engineer JC
Date published: 2023-02-28

Does it display just the volume(gallon/litres) or can it display flow rate(gpm/lpm) as well?

Asked by: akasal
Thank you for your question? The FTB300 series Micro-Flow meters can display both volume and flow rate.
Answered by: application engineer je
Date published: 2020-07-22

Is there any damage to the unit if exposed to flow rates higher than its flow reading capability?

Asked by: SA Engineer
Thank you for your inquiry! Exceeding the specified flow range can damage internal components by overspinning the paddle. In general slightly exceeding the maximum on occasions will not be an issue. Regularly exceeding the maximum flow rate by more than 10% may lead to excessive wear and deterioration of the meter.
Answered by: Application Engineer JM
Date published: 2022-09-02

I have three FTB300, one of them return me a 4Vdc from the sensor when there's no flow and I actually have a feedback on my PLC when there's flow.The two other 0V when there's no flow, and around 2V when there's a flow, and I don't have any feedback

Asked by: GCarrier
Thank you for your inquiry about the sensor. Please forward your statement to further assist trouble shooting the flow meter to the Flow Group at flow@omega.com
Answered by: Application Engineer JC
Date published: 2023-06-21
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