Skip to search Skip to main content Skip to navigation

PST joins DwyerOmega. Read more>

We noticed you are from . Visit your local site for regional offers and live support.

Gas Mass Flow Meters for Clean Gases with Optional Integral Display

Economical Gas Mass Flow Meters for Clean Gases with Optional Integral Display

C$1,752.20

Item# FMA1812A-ST

In stock

Lead Time (If not in stock): 6 weeks
Economical Gas Mass Flow Meters for Clean Gases with Optional Integral Display FMA1812A-ST FMA1812A-ST
  • Reads Gas Mass Flow Without Temperature or Pressure Compensation
  • Available in Economical Aluminum or Corrosion- Resistant 316 SS
  • Tiltable LCD Display for Easy Reading
  • NIST Traceable Calibration Included

FMA1812A-ST Model Options

View all models

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.

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


The FMA1700A/1800A Series eletronic gas mass flow meters allow users to monitor the flow of a wide variety of gases from 10 SCCM up to 1000 SLM. Utilizing heat transfer through a heated tube to measure molecular gas flow rate, the FMA1700A/1800A provides measurement of direct gas mass flow rate, 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 FMA1700A series without integral display is supplied with a field selectable analog 0 to 5 Vdc or 4 to 20 mA output for remote monitoring; the FMA1800A series has both an integral 3½ digit display and analog output. The display is tiltable over 90 degrees for viewing convenience. The display is calibrated standard to readout directly in SCCM or SLM for nitrogen (other gas calibrations available on special order). Due to their low cost, digital display, analog output capability, and insensitivity to variations in gas temperature and pressure, the FMA1700A/1800A Series are ideal substitutes for many Variable Area Flow Meter applications. When used with the FMA178BP portable battery pack, the FMA1800A Series are ideal for in-the-field calibration of flow meters or testing of air sampling equipment. The FMA178BP battery pack includes batteries, recharger, and carrying case with shoulder strap and belt loop. With the FMA178BP, the flow meter can operate in excess of 40 hours; the batteries can be recharged at least 200 times. The FMA1700A/1800A Series require 12 to 26 Vdc power @ 200 mA maximum, which can be supplied by the FMA178PW plug-in socket power supply. The electronics are reverse polarity protected and has externally accessible fusing. Model number FMA178C (supplied separately) provides a mating 9-pin “D” connector with 3 feet of ribbon cable for accessing the 0 to 5 Vdc output signal and power input connections (use FMA178C-MA for 4 to 20 mA output signal connection). The LCD supplied with the FMA1800A 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.

SPECIFICATIONS
Accuracy: ±1% of full scale, including linearity over 15 to 25°C and 5 to 60 psia (0.35 to 4.2 kg/cm²)(For sizes up to 100SLM), ±1.5% of full scale, including linearity over 15 to 25°C and 5 to 60 psia (0.35 to 4.2 kg/cm²)For larger sizes)
Turn-Down Ratio: 100:1
Repeatability: ±0.5% of full scale and for units ≥100 scm from 0 to 20% of range
Temperature Coefficient: 0.15% of full scale per °C or better
Pressure Coefficient: 0.01% of full scale per psi (0.07 bar)
Response Time: 800 msec time constant; 2 seconds (typical) to within ±2% of set flow rate over 25 to 100% of full scale
Power Requirements:12 to 26 Vdc power @200 mA maximum
Maximum Gas Pressure: 1000 psig (70 kg/cm² gauge) for ranges upto 100 SLM; 500 psig (35 kg/cm² gauge)Above 100 SLM; 20 psig optimum
Gas and Ambient Temperature: 0 to 50°C (0 to 122°F)
Leak Integrity: 1 x 10-9; std cc/sec of helium maximum 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 250 Ω loop resistance
Transducer Power: 12 to 26 Vdc @ 200 mA maximum (FMA178PW)
Shipping Weight: 1.1 kg (2.5 lb)
Compliance: EN55011 class 1, class B; EN50082-1
loading all models
loading all reviews
Rated 4 out of 5 by from Sr. Engr. Tech. Always happy with the Omega flow meters. Will keep buying this product.
Date published: 2017-04-05
Rated 2 out of 5 by from Poor performance Generally unsatisfied with the quality and reliability of this product. For research grade purposes, save your money or go for more reliable and more expensive models.
Date published: 2017-08-18
Rated 5 out of 5 by from Typical Omega works perfectly. Warms up quickly, and gives quick enough feedback for our needs.
Date published: 2023-09-14
Rated 5 out of 5 by from Easy purchase always an easy way to purchased and choose rhe correct flow meter
Date published: 2023-08-25
Rated 5 out of 5 by from Gas Flow Meter This flow meter was well packaged, was easy to setup and worked as advertised. Would reccomend this FM to anyone looking for a precise mass flow measurement. Just make sure you only use it with dry air!
Date published: 2023-08-07
Rated 5 out of 5 by from Nice It works great, easy to set up and use as well. Would buy again
Date published: 2023-04-02
Rated 4 out of 5 by from Mass flow meter Well worth the price, works as well as units much more expensive. Will have to see how it does in the duration department.
Date published: 2021-12-22
Rated 4 out of 5 by from good piece of equipment good product that was easy to setup and capture the data off of it. Plus the display was really helpful.
Date published: 2021-04-21
  • y_2024, m_12, d_4, h_6
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.42
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_8
  • loc_en_CA, sid_FMA1812A-ST, prod, sort_[SortEntry(order=HELPFULNESS, direction=DESCENDING), SortEntry(order=POSITIVE_FEEDBACK, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_omega
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 3ms
  • REVIEWS, PRODUCT
loading all QA

We have purchased model FMA1844A. We are looking for instructions to change the display for showing a decimal place.

Asked by: George S
Sent in question to the email address and recieve automatically generated help desk tickets #00497016 and #00505210. I have never recieved a response to either one. Please be wary of purchasing a product from a company that has NO customer service!
Answered by: George S
Date published: 2022-10-27

Does this flow meter have a digital output reader and can this be used with flammable gases?

Asked by: Errrrrr
Thank you for your inquiry. The FMA1800A series part number sequence will have the LCD display and it is not meant to be used or measure flammable gases, not rated for hazardous applications.
Answered by: Application Engineer JC
Date published: 2023-05-19

What is the difference between the 1800 and 1800A series flowmeters?

Asked by: JDMorrow
The main difference is the power supply. FMA1800A has range 12-26 VDC for input power supply. The FMA1800 can only take 12 VDC.
Answered by: ASE HPO
Date published: 2020-01-10

For the 1700a/1800a series, is there a way to hook up the flow meter (using the serial port) to a computer to export the digital output in order to be able to plot the flow data over time (i.s- use a program such as excel)?

Asked by: Anonymous
No. The FMA1700/1800A series do not have serial communication output. They need a module to have RS232 or RS485 communication. Review module FMI series https://br.omega.com/omegaFiles/green/pdf/FMI-100.pdf
Answered by: ASE HPO
Date published: 2020-02-20

Can I buy the display for these separately?

Asked by: ianRusa
Thank you for your inquiry about the mass flow meter. Yes, you may purchase a display separately if you currently have a meter without a display. You may email flow@omega.com to provide the exact mass flow meter part number and can prepare a quote.
Answered by: JC ENGR
Date published: 2020-07-30

What is the difference between FMA1844 and FMA1844A?

Asked by: acampbell
Thank you for your inquiry! The FMA1844A is the newer version of the FMA1844. Most parameters are the same but the FMA1844A units accept 12-26VDC. The older models had a 12 and 24 VDC option.
Answered by: Application Engineer JM
Date published: 2021-10-22

In the manual on page 28 titled "Dimensioned Drawings," dimension "J" for the screw sizes/threads is missing from the table, and no screw hole-to-hole distance perpendicular to "G" is provided. Would you update the manual with these dimensions?

Asked by: Peter P
Thank you for your inquiry! The "J" dimension can vary based on the specific model number selected. Please email us at flow@omega.com so that we can provide the dimensions for your exact model.
Answered by: Application Engineer JM
Date published: 2021-06-29

I do not see Cv provided. How would I find the Cv of the flow meter?

Asked by: AU GRA
Thank you for your inquiry about the Mass Flow Meter. Unfortunately, there is no Cv factor associated with mass flow meters, it is limited to solenoid valves.
Answered by: Application Engineer JC
Date published: 2023-03-21
  • y_2024, m_12, d_3, h_7CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.42
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_22
  • loc_en_CA, sid_FMA1812A-ST, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_omega
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getContent, 3ms
  • QUESTIONS, PRODUCT
Portable battery pack for standard 12Vdc powered models only, with recharger for 220Vac
C$550.56
0 In Stock
Socket plug-in power supply for 110 Vac/24 Vdc, North American style plug
C$121.04
2 In Stock
Socket plug-in power supply for 230 Vac/24 Vdc, European style plug
C$124.30
0 In Stock
Socket plug-in power supply for 240 Vac/24 Vdc, Australian style plug
C$124.30
0 In Stock
Socket plug-in power supply for 240 Vac/12 Vdc, Australian style plug
C$116.37
0 In Stock
Socket plug-in power supply for 240 Vac/12 Vdc, U.K. style plug
C$116.37
3 In Stock
Socket plug-in power supply for 240 Vac/24 Vdc, U.K. style plug
C$124.30
0 In Stock
Accessories
Portable battery pack for standard 12Vdc powered models only, with recharger for 115Vac
C$426.47
0 In Stock
Female 9-pin D-connector with 3 ft of ribbon cable, 0 to 5 Vdc out
C$62.05
13 In Stock
Same as FMA178C, but for 4-20 mA output
C$53.73
0 In Stock
25' cable for remotely locating LDC of FMA1800
C$86.07
0 In Stock
10' cable for remotely locating LDC of FMA1800
C$54.83
12 In Stock
Socket plug-in power supply for 110 Vac/12 Vdc, North American style plug
C$83.29
8 In Stock
Socket plug-in power supply for 230 Vac/12 Vdc, European style plug
C$110.18
2 In Stock
en-CA
en
Save Configuration