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Stainless Steel Low Flow Turbine Flow Meter w/Optional Display

Air/Water Flow Sensors with 0 to 5 Vdc Output


Item# FLR1007

In stock

Lead Time (If not in stock): 6 weeks
Air/Water Flow Sensors with 0 to 5 Vdc Output FLR1007 FLR1007
  • 0 to 5 Vdc Linear Output Signal
  • Power Input 12 Vdc or 24 Vdc (depending on the model)
  • Ranges from 20 to 100 ml/min, 100 to 500 L/min
  • 1% Accuracy for Liquids/3% Accuracy for Gasses

FLR1007 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.

*Highlighted options are not compatible. Please select a different combination.

Media type
Flow Range
Output Signal
Max Operating Pressure
Max Process Temperature
Wetted Materials
Process Connection Size
Process Connection Type

  • Accuracy Value ±3% FS
  • electrical Connection 0.9 m (3') cable length
  • Maximum Operating Pressure 40 psi at 20°C (68°F) for gas
  • Maximum Ambient Temperature 50°C (122°F)
  • Output Signal 0 to 5 Vdc
  • Minimum Ambient Temperature 0°C (32°F)
  • Power Source 11.5 to 15 Vdc regulated
FLR1000 Series flow sensors can measure extremely low flow rates from 20 mL/min to 500 L/min. These sensors are suitable for a wide variety of industrial, commercial, and laboratory flow applications. Not for use with Hydrogen or Helium. FLR1000 Series flow sensors operate on 12 Vdc power and are designed for incorporation into data acquisition systems that supply 12.5 Vdc to sensors and receive 0 to 5 Vdc linear signals in return. Because of their cost effectiveness, FLR1000 Series units may replace conventional glass tube and ball flow meters in applications in which an electrical signal proportional to flow rate is desired.

The FLR1000 Series uses a Pelton-type turbine wheel to determine the flow rate of the gas. The rotation rate of the turbine wheel is linear over a wide dynamic range. The electro-optical system consists of a diode emitting energy in the infrared spectrum. Light energy is alternatively reflected and absorbed from "spokes" deposited on the small turbine wheel. This reflected light energy is detected by a photodiode. Thus, as the turbine wheel rotates in response to gas flow rate, electrical pulses are generated. Processing circuitry provides a DC voltage output proportional to the flow rate. For example, output signal is 1.0 Vdc at 20% of rated flow, 2.5 Vdc at 50% of rated flow, 4.0 Vdc at 80% of rated flow, and 5.0 Vdc at 100% of rated flow. Sensors can handle 20% above their rated flow without being damaged.

FLR1000 Series
Accuracy: ±3% FS
Display: 3½-digit LCD, 22 mm (7/8") H
Output Signal: 0 to 5 Vdc, adjustable ±20% (typical)
Power Requirement: 11.5 to 15 Vdc regulated, 30 mA (typical)
Standard Sensor Material: 40% glass filled polyphenelene sulfide, glass window, stainless steel bearing support; sapphire shaft and bearing; FKM rubber O-rings standard
Pressure Rating: 40 psi at 20°C (68°F) for gas, 100 psi for liquid, 500 psi for brass units using liquid services
Temperature Rating: 0 to 50°C (32 to 122°F)
Temperature Sensitivity: ±0.2%/°C
Linearity: ±3% FS
Repeatability: ±0.5% FS from 50 to 100% of rated max flow for gas; ±0.2% FS for liquid
Cable Assembly: 0.9 m (3') cable length
Display: 76 x 44 x 89 mm (3 x 1.75 x 3.5")
Non-Display: 60 x 42 x 37 mm (2.35 x 1.65 x 1.25")
Pressure Sensitivity: ±0.07%/mm Hg (using air at 1 to 3 atm)
Mounting: Holes for #4 screw provided

   Voltage Output Models: 11.5 to 12.5 Vdc (0.4 W @ 12 Vdc)
   Current Output Models: 18 to 24 Vdc (1.2 W @ 24 Vdc), 50 mA

Gas Flow Models - PPS Construction
Model No.
No Display
Model No.
with Display
Flow Range Max Pressure Drop Acetal Tube Fitting
FLR1001 FLR1001-D 20 to 100 mL/min 20 Inches Water 1/8"
FLR1002 FLR1002-D 40 to 200 mL/min 8 Inches Water 1/8"
FLR1003 FLR1003-D 100 to 500 mL/min 2 Inches Water 1/8"
FLR1004 FLR1004-D 200 to 1000 mL/min 2 Inches Water 1/8"
FLR1005 FLR1005-D 0.4 to 2 L/min 2 Inches Water 1/4"
FLR1006 FLR1006-D 1.0 to 5 L/min 2 Inches Water 1/4"
FLR1201 FLR1201-D 2.0 to 10 L/min 3 Inches Water 1/4"
FLR1202 FLR1202-D 4.0 to 20 L/min 3 Inches Water 3/8"
FLR1203 FLR1203-D 10 to 50 L/min 3 Inches Water 3/8"
FLR1204 FLR1204-D 20 to 100 L/min 3 Inches Water 1/2"
FLR1205 FLR1205-D 40 to 200 L/min 5 Inches Water 1/2"
FLR1206 FLR1206-D 100 to 500 L/min 20 Inches Water 1/2"

Liquid Flow Models - PPS Construction
Model No.
No Display
Model No.
with Display
Flow Range Max Pressure Drop Acetal Tube Fitting
FLR1007 FLR1007-D 13 to 100 mL/min 10 psi 1/8"
FLR1008 FLR1008-D 20 to 200 mL/min 10 psi 1/4"
FLR1009 FLR1009-D 50 to 500 mL/min 10 psi 1/4"
FLR1010 FLR1010-D 100 to 1000 mL/min 6 psi 1/4"
FLR1011 FLR1011-D 0.2 to 2 L/min 6 psi 1/4"
FLR1012 FLR1012-D 0.5 to 5 L/min 6 psi 3/8"
FLR1013 FLR1013-D 1.0 to 10 L/min 10 psi 3/8"
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Rated 4 out of 5 by from These work as expected We have used these in the past, so we know what to expect.
Date published: 2016-06-21
Rated 5 out of 5 by from Digital Flow Sensor This flow sensor that I bought works well. The display makes it very convenient to control the flow rate. I highly recommend it.
Date published: 2023-07-26
Rated 5 out of 5 by from Easy and Reliable We have several of these FLR series flow meters in the lab. They are easy to use, and very reliable.
Date published: 2023-04-01
Rated 5 out of 5 by from Perfect The flowmeter works perfectly out of the box as advertised.
Date published: 2023-02-05
Rated 1 out of 5 by from VERY POOR! Wrong Reading! Bought this flowmeter and tested it (measuring cylinder and timer)only to realise the reading was way off the mark. Please be careful, look for a calibration certification if you plan to get one.
Date published: 2022-02-18
Rated 4 out of 5 by from C+ to B- FLR1204 20-100L/min works. Spec sheet states "fast response" I did not find this to be true. Power requirements states 30mA (typical) with 11.5 V to 15.0 V supply, so 0.345 W to 0.45 W. Data logger has .4 W. Will data logger power the senor or not??? Also, the FLR1204 sensor is on a by-pass plumbing, I was not aware of this.
Date published: 2021-02-27
Rated 3 out of 5 by from works and functions but limited Purchased unit but had to return the first one due to a defect on the screen. got the second one in and it works great, in an environment without any back pressure. The second any pressure is added to the mix the gauge is rendered useless. unfortunately the testing we are performing requires some pressure while still maintaining flow and we are not able to get the value we are looking for. looking at other gauges that might have a different system to make our test work.
Date published: 2019-04-10
Rated 3 out of 5 by from Warning - Will not work with Hydrogen Will not work with Hydrogen even though the manual says call Omega for Hydrogen calibration info. Talked to an Omega engineer and was told they cant give calibration info because the unit will leak hydrogen.
Date published: 2018-02-11
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loading all QA

Will this work with automotive liquids such as gasoline, diesel? If not can you suggest an alternative low flow rate meter.

Asked by: tempest
Thank you for your inquiry! These flow meters incorporate infrared light into the measurement of flow rate and thus require that all fluids be translucent. Additionally, they are calibrated with water and will deviate with viscosities varying from water. Though suitable for up to 10 centistokes, accuracy may be affected by the combination of these factors. The FLR series would still be our best suited option as we do not have another offering with a similar flow range and analog output.
Answered by: Application Engineer JM
Date published: 2022-07-29

What is the pinout for this sensor in a 4-20 mA model? P/N FLR1009ST-I. Thank you.

Asked by: Stingray36
Thank you for your inquiry about the flow meter. The manual outlines the wire schematic flow the "-I' flow meter such as the FLR1009ST-I meter you have. It goes as follows on page 13 of 34. The RED wire should be connected to the Positive of the power source. The BLACK wire should be connected to the Negative ( Ground ) of the power source. The WHITE wire provides the signal output (active current) and should be connected to the positive terminal of the display, data acquisition system or current meter with an impedance of 0 - 500Ω (Ohms). The GREEN wire is NOT used.
Answered by: Application Engineer JC
Date published: 2022-01-05

Can I use this to measure the permeability of prepreg composite under a vacuum bag?

Asked by: Robyn123
Thank you for your inquiry about the flow meter. Unfortunately, it is not recommend to use under vacuum. The FMA1700/1800A mass flow meters for gases can measure flow rate in vacuum conditions.
Answered by: Application Engineer JC
Date published: 2021-11-04

What is the Mfr and P/N of the electrical connector? Or, better yet, the mating connector/crimps?

Asked by: Pablo
Thank you for your question? We do not sell the connector alone. If you are looking for the power supply connector, the part number for the connector and cable is FLR1000-PW for 120VAC, or FLR1000-230PW for 230VAC. If you are looking for the communication cable connector, the part number for the connector and cable is FLR1000-C.
Answered by: application engineer je
Date published: 2019-07-08

Can I use this meter as is to measure a water flow but also a more viscous (10 cP), transparent mix (water with honey) or do I need to do a measurement and calculate a conversion ("k") factor for the viscous fluid?

Asked by: cristel
Thank you for your inquiry about this flow meter. Unfortunately, 10 cP is the maximum viscosity that the flow meter can handle or is recommended to measure. An alternative for viscous liquids is using a positive displacement flow meter.
Answered by: Application Engineer JC
Date published: 2021-09-22

The user's guide / manual for these units (FLR1003 / FLR1203) indicate Viton O-rings as standard, but EPDM optional. Can I order the EPDM option?

Asked by: SeanS
Yes. Add suffix "-EPDM" to the part number for the EPDM O ring option.
Answered by: ASE HPO
Date published: 2019-10-22

With operating Temperatures around 15 to 70 Degree Celsius and pressure ranging from 2 to 1000Kpa with water as working fluid and data to be read on Labview. I will like to know if this meter will be suitable for my desired application?

Asked by: Toochi
Thanks for your question. The FLR1000 series maximum working temperature is 55 degrees C. This meter cannot handle 70 degrees C.
Answered by: ASE HPO
Date published: 2020-02-03

Will this work with a coolant liquid at -10 C? The coolant is glycol-water mix.

Asked by: MarcA
Thanks for your question. The FLR1000 series meters have an operation temperature range of 5-55 C and a storage temperature range of 0-70 C. This meter cannot handle -10 C temperatures.
Answered by: Jane
Date published: 2019-06-19
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