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Mass and Volumetric Flow Meters


Item# FMA-1607A

In stock

Lead Time (If not in stock): 3 weeks
Mass and Volumetric Flow Meters FMA-1607A FMA-1607A
  • Ranges of 0 to 0.5 SCCM Up to 0 to 3000 SLM
  • < 10ms Response Time—Field Adjustable
  • 130+ Gas Calibrations with Every Unit: Air, Ar, CH4, CO, CO2, Ethane, H2, He, N2, N2O, Neon, O2, Propane, Butane, Acetylene, Ethylene and more
  • Pressure, Temperature, and Volumetic and Mass Flow Simultaneously Displayed

FMA-1607A Model Options

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Flow Range
Output Signal
Wetted Materials
Max Operating Pressure
Process Connection Type:
Process Connection Size:
Media Type
Communications Protocol
Max Process Temperature

The FMA-1600A Series mass and volumetric Omega's flow meters use the principle of differential pressure within a laminar flow field to determine the mass flow rate. A laminar flow element (LFD) insdie the meter forces the gas into laminar (streamlined) flow. Inside this region, the Poiseuille equation dictates that the volumetric flow rate be linearly related to the pressure drop along a fixed distance of the LFE. This, along with the viscosity of the gas, is used to accurately determine the volumetri flow rate. Separate absolute temperature and pressure sensors are incorporated and correct the volumetric flow rate to a set of standard conditions. This standardized flow rate is commonly called the mass flow rate and is reported in units such as standard cubic feet per minute (SCFM) or standard liters per minute (SLM).

Standard units include a 0 to 5 V output (4 to 20 mA optional) and RS232 communications. The gas select feature can be adjusted from the front of the keypad or via RS232 communications. Volumetric flow, mass flow, or absolute pressure, and temperature can be viewed or recorded through the RS232 connection. It is also possible to multi-drop up to 26 units on the same serial connection to a distance of 125'. These flowmeters are also available in a portable version for use in the field (-B models).

Accuracy: ±(0.8% of rdg + 0.2% FS)
Repeatability: ±0.2%
Turndown Ratio: 200:1
Response Time: 10 ms typical default response time for 63.2% of a step change. A variable register allows response time to be field adjustable to a certain extent via RS232 communications. The primary trade-off for response time is signal noise
Output: 0 to 5 Vdc standard
Operating Temperature: -10 to 50°C (14 to 122°F)
Zero Shift: 0.02% FS/°C/atm
Span Shift: 0.02% FS/°C/atm
Humidity Range: 0 to 100% non-condensing
Pressure (Max):
   FMA-1600A Series: 145 psig
   FMA-1600A Series: 50 psi differential
   FVL-1600A Series: 10 psig
   FVL-1600A Series: 10 psi differential
Measurable Flow Rate: 125% FS
Supply Voltage: 7 to 30 Vdc (15 to 30 Vdc for 4 to 20 mA output)
Supply Current: 35 mA typical current draw; 100 mA available supply recommended
Cable Connection: 8-pin mini DIN
Wetted Parts: 303 & 302 Stainless Steel, FKM Heat Cured Silicone Rubber, Glass Reinforced Polyphenylene Sulfide, Heat Cured Epoxy, Aluminum, Gold, Silicon, Glass. Contact Omega engineering for details.
-LSS (Option):316LSS, 303SS, 430FRSS, Perfluoroelastomer standard, FKM, EPDM, Buna, Neoprene Standard Pressure Drops (venting to atmosphere):
Max Flow Rate 0.5 to 50 SCCM 0.1 to 10 SLM 20 SLM 50 SLM 100 SLM 250 SLM 500 SLM 1000 SLM 1500 SLM
PSID 1 1 1 2 2.5 4.0 5.5 6.0 9.0
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Rated 4 out of 5 by from Good Mass Flowmeter Easy to setup and reliable. Easy to use. Remote operation needs expert installation but is easy to use after setup. Price could be lower to have a broader application.
Date published: 2016-11-17
Rated 3 out of 5 by from Need better software IT works well, but would love to see a better user interface to connect it to PC. Using PuTTY kind of sucks.
Date published: 2023-08-07
Rated 5 out of 5 by from Highly recommend Great product! I was worried this wouldn't arrive in time for when it was needed but very quick!
Date published: 2023-07-26
Rated 5 out of 5 by from As Advertised Worked as advertised. No issues. seems robust for out testing environment
Date published: 2023-03-20
Rated 3 out of 5 by from 2 units defective out of box The negative terminal was shorted to the body of the sensor and would not work unless the sensor was installed isolated from ground, which we couldn't do in our application. They are easy to disassemble, and the problem was obvious, as one of the wires that connects to the terminal extended about 1/2" past the point that it was soldered at, so the bare wire came into contact with the body of the sensor when it was assembled.
Date published: 2023-01-05
Rated 5 out of 5 by from Very Dependable Unit These units are very dependable. Have bought them on several occasions. Omega also has a good return policy which I had used because I had mistakenly bought the wrong unit. It was very painless to get it sent back and order the correct one.
Date published: 2022-03-22
Rated 5 out of 5 by from Dependable I have bought these in the past and never had any issues. Its why we continue to buy them.
Date published: 2022-03-08
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loading all QA

hi how i can connect it to o2 generator @65 psi thank you

Asked by: asdsand
Good Afternoon, Intended to read Air flow, does the display can be selected to show the flow in PPH?
Answered by: EEC123
Date published: 2021-05-06

these devices comes with a NIST calibration Cert

Asked by: Luis F
Thank you for your inquiry about the mass flow meter. Per the data sheet for this flow meter series: Comes complete with 24 Vdc universal power supply, 1.8 m (6') cable, 8-pin male Mini-DIN connector, operator&rsquo;s manual, and NIST certificate.
Answered by: Application Engineer JC
Date published: 2022-08-11

What is the standard pressure and temperature used for the flow rates stated for the FMA-1600 mass flow meters?

Asked by: Papa
Thank you for your inquiry about the mass flow meter. The FMA-1600A series are normally set to STP conditions of 25 Celsius and 14.696 PSIA.
Answered by: Application Engineer JC
Date published: 2022-06-29

I am plan to measuring oxygen flow to a process. How can I specify that the instrument must be cleaned for oxygen service?

Asked by: Papa
Thank you for your inquiry about the mass flow meter. Please compose an email and sent to the Flow Group at and will advise and/or provide a custom part number for it.
Answered by: Application Engineer JC
Date published: 2022-05-25

How do I connect the device to a PC/laptop? What accessories are needed and what software?

Asked by: Engineer JK
Thank you for your inquiry! These units come standard with RS232 communications which will be the means for connecting to a PC or laptop. This will require a serial cable and Hyperterminal program mentioned on page 26 of the product manual.
Answered by: Application Engineer JM
Date published: 2021-05-26

Can the FMA-1612A be used in vacuum systems with air? Do you have CAD files (ideally Inventor) of the meter's external dimensions?

Asked by: Ajjj
Thank you for your inquiry! Yes, the FMA-1612A can be used in vacuum systems. Unfortunately, we do not have any 3D models for this device. All available dimensions will be listed in the product manual for this unit.
Answered by: Application Engineer JM
Date published: 2023-02-13

Intended to read air flow, can the display be set up to read in PPM?

Asked by: EEC123
Thank you for your inquiry about the mass flow meter. Unfortunately, it does not have the ability to read in concentration, only volumetric and true mass flow rates.
Answered by: Application Engineer JC
Date published: 2021-05-07

What are the voltage levels of the RS232 signals? -12V to +12V?

Asked by: Dydos
Thank you for your inquiry. The mass flow meters have by factory default a 0 to 5V signal output or as an option a 4 to 20 mA and the RS232 is available as serial communication.
Answered by: Application Engineer JC
Date published: 2022-10-19
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