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Gas Mass Controllers With or Without Integral Display

Economical Gas Mass Controllers With or Without Integral Display


Item# FMA5527A

In stock

Lead Time (If not in stock): 6 weeks
Economical Gas Mass Controllers With or Without Integral Display FMA5527A FMA5527A
  • NIST Traceable Calibration
  • Reads and Controls Gas Mass Flow Without Temperature or Pressure Compensation
  • Available in Economical Aluminum or Corrosion-Resistant 316 SS
  • Tiltable LCD Display for Easy Reading

FMA5527A 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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Media Type
Flow Range
Output Signal
Wetted Materials
Max Operating Pressure
Process Connection Type:
Process Connection Size:
Max Process Temperature

The FMA5400A/5500A Series electronic gas mass flow controllers provide for controlling the flow of a wide variety of gases from 0-10 SCCM up to 100 SLM. Utilizing heat transfer through a heated tube to measure molecular gas flowrate, the FMA5400A/5500A provides measurement of direct gas mass flowrate, without the need to compensate for variations in gas temperature or pressure (within stated limits). They are available in an economical aluminum/brass construction for typical gas flows and a 316 SS construction for applications requiring more corrosion resistance. The FMA5400A series without integral display is supplied with both an analog 0-5 Vdc and 4 to 20 mA output for remote monitoring; the FMA5500A series has both an integral 3-1/2 digit display and analog output. The display is tiltable over 90 degrees for viewing convenience. The display is calibrated standard to read out directly in SCCM or SLM for nitrogen (other gas calibrations available on special order).

The FMA5400A/5500A mass flow controllers feature a built-in normally-closed electromagnetic valve for maintaining a constant flowrate regardless of variations in inlet or outlet pressures. The setpoint is controlled either locally via a potentiometer accessible through an access window in the case or remotely via an analog 0-5 Vdc or 4-20 mA signal (field selectable). The FMA5400A/5500A series require 12 to 26 Vdc power @ 800 mA maximum, which can be supplied by the FMA545PW wall plug-in socket power supply. 12 to 15 Vdc power @ 800 mA maximum (Sizes 43,44, and 45 ONLY). Model number FMA545C (supplied separately) provides a mating 15-pin “D” connector with 8 feet of shielded cable for accessing the analog output signals and power input connections. The LCD supplied with the FMA5500A series is connected to the lower electronics via a modular plug. The LCD can be remotely located by purchasing an FMA18RC remote cable assembly–you must then build your own assembly for panel mounting the LCD.

Accuracy: For units with full range less than 100 SLM ±1% FS, including linearity over 15 to 25°C (59 to 77°F) and
0.7 to 4.2 kg/cm² (10 to 60 psia). For units ≥ 100 SLM Full Range: ±1.5% FS, including linearity over 15 to 25°C (59 to 77°F) and 0.7 to 4.2 kg/cm² (10 to 60 psia) from 20 to 100% of range; ±3% FS from 0 to 20% of range.
Repeatability: ±0.5% of full scale
Temp Coefficient: 0.15% FS/°C
Pressure Coefficient: 0.01% FS per psi (0.07 bar)
Maximum Pressure Drop: 50 psid
Response Time: 5 seconds to within ±2% of set flow rate over 25 to 100% FS
Max Gas Pressure: 70 kg/cm2 gage (1000 psig)(For units up to 100 SLM); 35 kg/cm2 gage (500 psig); 1.76 kg/cm (25 psig) optimum
Gas and Ambient Temp: 5 to 50°C (41 to 122°F)
Leak Integrity: 1 x 10-7 cc/sec of He max to outside environment
Materials in Fluid Contact:
   Aluminum Models: Anodized aluminum, 316 SS, brass and FKM O-rings
   Stainless Steel Models: 316 SS and FKM O-rings
Output Signal:
   Linear 0 to 5 Vdc: 1000 Ω minimum load
   4 to 20 mA: 50 to 500 Ω loop resistance, ±20 mV max noise
Transducer Power: 12 to 26 Vdc @ 800 mA standard Turndown Ratio: 40:1
Shipping Weight: 1.8 kg (4 lb)
Compliance: EN55011 class 1, class B; EN50082-1
Attitude Sensitivity: With horizontal flow path, no shift in calibration up to +20 degree pitch
Gas Relative Humidity: 0 to 70% RH
Min Pressure Drop
SLM ≤9 10-30 50 60-100 200 500 1000
psid 1.1 3.9 8 18.9 10 12 15
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Rated 5 out of 5 by from You get what you pay for Works exactly as expected, like all Omega products.
Date published: 2023-09-08
Rated 5 out of 5 by from Mass flow controller It works great, very sensitive. Seller should provide a adapter with controllers to run
Date published: 2023-03-18
Rated 5 out of 5 by from Economic and Efficient This is a great purchase for our needs with economic price.
Date published: 2022-03-09
Rated 5 out of 5 by from Love them Great MFCs at a quick turn around, we use them in many applications. Some times in multiple flows.
Date published: 2022-02-20
Rated 1 out of 5 by from Difficult to work with and incomplete manual Mass flow controller is not functional with shop air.
Date published: 2021-09-06
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Does the FMA5400A/5500A both measure and control flow rate? Or will I need two separate products?

Asked by: Travis_ASML
Thank you for your inquiry for the mass flow controller. First, it is advised to use as a controller to control the gas and can be used as a flow meter, in the event that you do not have the means to measure flow rate only. You can use the override Purge on PINS 3 & 4 for 15 minutes at a time and this is due to the cylinder becoming hot and needs to cool down to the touch.
Answered by: Application Engineer JC
Date published: 2021-10-01

I have an FMA5508A-ST MFC with me and I have used it with many gases like Ar, He, etc. I wanted to know is it compatible with water vapors? I wanted to use around 10% water vapor in Ar for my experiments. Thanks in advance.

Asked by: Anand
Thank you for your inquiry about the MFC. Unfortunately, the MFC work best with clean, dry gases and can sustain relative humidity, non-condensing gases, up to 70%.
Answered by: Application Engineer JC
Date published: 2022-02-15

We required Flow controllers for Methane gas & flow is 34LPM & second one for Propane gas 350 Liter per hours. Kindly suggest us your best module for the same.

Asked by: GB Velekar
Thank you for your inquiry about the mass fow controllers. It would be recommended to use the FMA5528A for methane gas and FMA5520A for propane gas and will need to create a customized part number for the flow controllers mentioned and then, have it loaded onto the web site to prepare a quote.
Answered by: Application Engineer JC
Date published: 2022-02-28

I want to know the educational prices of the machine OMEGA FMA5502A

Asked by: Jiatu
Thank you for your inquiry. Please email your request to
Answered by: Application Engineer JB
Date published: 2021-08-24

Hello, I'm looking for a flow controller that can handle flows (CO/Nitrogen mix) of around 200-300 ml/min with an accuracy of plus/minus 2%. Can you suggest something ?

Asked by: GasLab
Thank you for your inquiry. The FMA5512A is the controller that will fit the flow range and can have it calibrated specifically for the percentage mixture of gas by weight or by volume. Please note that in the event the composition changes during the reaction, the controller is not able to compensate for the changes that occurr.
Answered by: Application Engineer JC
Date published: 2023-07-28

I need to set flow rates, but I don't see a way to key in my settings, so how exactly this works? I have a FMA5518A-C

Asked by: Henry Z
Thank you for your inquiry! The flow rate can be controlled through either locally or remotely depending on preference. Local control requires the use of the local set point potentiometer on the back of the unit. For remote control 0-5 VDC or 4-20 mA reference signals will be needed to adjust the flow.
Answered by: Application Engineer JM
Date published: 2021-11-01

Hello, I'm looking for a flow controller that can handle flows of CO of around 400–500 ml/min at a pressure of 1000 psig with an accuracy of plus/minus 2%. Can you suggest something?

Asked by: Vahid B
Thanks for your question. FMA5514A-CO2 gas controller will handle up to 730 mL/min of CO2. Please email us to for a formal quote
Answered by: ASEHPO
Date published: 2023-11-27

I have FMA5502A on hand but there is no instructions on how to use the potentiostat on the back to adjust the flow rate, or set the identity of the gas (we want to use this for CO2). Do you have detailed instructions on this?

Asked by: ALGU
Thank you for your inquiry about the MFC. If manually controlling the flow via the potenitometer, clock-wise turn is increasing the flow rate and counter clock-wise would decrease the flow rate and it may take a number of 360 degree turns to reach the desire flow via the LCD display. The manual has a chart listing a number of different gases that can be used to control and along with a K-factor associated to multiply against the flow rate on the LCD that will account for that specific gas.
Answered by: Application Engineer JC
Date published: 2023-06-15
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