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Mass and Volumetric
TM
Gas Flow Meters
For Clean Gases
FMA-1600A Series
Standard
U Up to 18 Hour Battery Charge on Portable
“-B” Models
U Ranges of 0 to 0.5 SCCM Up to 0 to 3000 SLM
U Reports Mass Flow, Volumetric Flow,
Temperature, and Pressure
U <10 ms Response Time—Field Adjustable
U 130+ Gas Calibrations Including
Pure and Mixed Gases
U Pressure, Temperature and Volumetric or
Mass Flow Simultaneously Displayed
U NIST 5-Point Certificate Included
U No Straight Runs of Pipe Required
U No Warm-Up Time
U Turndown Ratio of 200:1 (0.5% Maximum Flow)
U RS232 Standard
U Custom Live Gas Blend Programming
U Store Up to 20 User Defined Gas Blends
FMA-1603A includes 110 Vac power supply and
a 1.8 m (6') cable 8-pin mini DIN connector,
Shown smaller than actual size.
The FMA-1600A Series mass and volumetric
flow meters use the principle of differential pressure
within a laminar flow field to determine the mass flow
rate. A laminar flow element (LFE) inside 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. A differential pressure sensor is used
to measure the pressure drop along a fixed distance
of the LFE. This, along with the viscosity of the gas, is
used to accurately determine the volumetric 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 5V output (4 to 20 mA
optional) and RS232 communications. The gas select
feature can be adjusted from the front keypad or via
RS232 communications. Volumetric flow, mass flow,
absolute pressure, and temperature can all 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 38 m (125'). These flow
meters are available in a portable version (“-B” option),
the battery charge will last up to 18 hours.
Specifications
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 (Maximum): 145 psig
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: 302 and 303 SS, FKM, heat cured silicone
RTV, glass reinforced PPS, heat cured epoxy, aluminum,
gold, brass, 430 FR stainless (416 stainless steel on large
sizes), silicon, glass
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Program Custom Mixed Calibrations
for Bioreactors, Chromatography,
Welding, Lasers, Stack/Flue, Fuel Gases and More
Differential Pressure
Absolute Pressure
Sensor
Sensor
Temperature
Sensor
Exploded View of Internal
Laminar Flow Elements
Flow Range Height Length Depth Port Size
0.5 to 50 SCCM 98.98
100 to 500 SCCM and
1 to 20 SLM
50 and 100 SLM 110.92
250 SLM 126.16
500 to 1500 SLM 126.16
(3.897)
103.30
(4.067)
(4.367)
(4.967)
(4.967)
60.33
(2.375)
60.33
(2.375)
101.60
(4.0)
101.60
(4.0)
101.60
(4.0)
Dimensions: mm (inch)
26.67
(1.05)
26.67
(1.05)
40.64
(1.6)
40.64
(1.6)
40.64
(1.6)
10-32
UNF
1
⁄8 FNPT
1
⁄4 FNPT
1
⁄2 FNPT
3
⁄4 FNPT
2
Standard Pressure Drops†
Full Scale Flow Rate psid
0.5 to 50 SCCM 1
100 SCCM to 10 SLM 1
20 SLM 1
50 SLM 2
100 SLM 2.5
250 SLM 4.0
500 SLM 5.5
1000 SLM 6.0
1500 SLM 9.0
† Venting to atmosphere.
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To Order
Mass Flow meter
Model No.
FMA-1601A FMA-1601A-I FMA-1601A-I2 FMA-1601A-V2
FMA-1602A FMA-1602A-I FMA-1602A-I2 FMA-1602A-V2
FMA-1614A FMA-1614A-I FMA-1614A-I2 FMA-1614A-V2
FMA-1615A FMA-1615A-I FMA-1615A-I2 FMA-1615A-V2
FMA-1603A FMA-1603A-I FMA-1603A-I2 FMA-1603A-V2
FMA-1616A FMA-1616A-I FMA-1616A-I2 FMA-1616A-V2
FMA-1604A FMA-1604A-I FMA-1604A-I2 FMA-1604A-V2
FMA-1617A FMA-1617A-I FMA-1617A-I2 FMA-1617A-V2
FMA-1618A FMA-1618A-I FMA-1618A-I2 FMA-1618A-V2
FMA-1619A FMA-1619A-I FMA-1619A-I2 FMA-1619A-V2
FMA-1620A FMA-1620A-I FMA-1620A-I2 FMA-1620A-V2
FMA-1605A FMA-1605A-I FMA-1605A-I2 FMA-1605A-V2
FMA-1606A FMA-1606A-I FMA-1606A-I2 FMA-1606A-V2
FMA-1607A FMA-1607A-I FMA-1607A-I2 FMA-1607A-V2
FMA-1608A FMA-1608A-I FMA-1608A-I2 FMA-1608A-V2
FMA-1609A FMA-1609A-I FMA-1609A-I2 FMA-1609A-V2
FMA-1610A FMA-1610A-I FMA-1610A-I2 FMA-1610A-V2
FMA-1611A FMA-1611A-I FMA-1611A-I2 FMA-1611A-V2
FMA-1612A FMA-1612A-I FMA-1612A-I2 FMA-1612A-V2
FMA-1613A FMA-1613A-I FMA-1613A-I2 FMA-1613A-V2
FMA-1621A FMA-1621A-I FMA-1621A-I2 FMA-1621A-V2
FMA-1622A FMA-1622A-I FMA-1622A-I2 FMA-1622A-V2
FMA-1623A FMA-1623A-I FMA-1623A-I2 FMA-1623A-V2
4 to 20 mA Output
Model No.
Two 4 to 20 mA Output
Model No.**
Two 0 to 5V Output
Model No.**
Connection
Maximum
Flow
10 to 32 thread 0.5 SCCM
10 to 32 thread 1 SCCM
10 to 32 thread 2 SCCM
10 to 32 thread 5 SCCM
10 to 32 thread 10 SCCM
10 to 32 thread 20 SCCM
10 to 32 thread 50 SCCM
1
⁄8 FNPT 100 SCCM
1
⁄8 FNPT 200 SCCM
1
⁄8 FNPT 500 SCCM
1
⁄8 FNPT 1 SLM
1
⁄8 FNPT 2 SLM
1
⁄8 FNPT 5 SLM
1
⁄8 FNPT 10 SLM
1
⁄8 FNPT 20 SLM
1
⁄4 FNPT 50 SLM
1
⁄4 FNPT 100 SLM
1
⁄2 FNPT 250 SLM
3
⁄4 FNPT 500 SLM
3
⁄4 FNPT 1000 SLM
3
⁄4 FNPT 1500 SLM
3
⁄4 FNPT 2000 SLM
11⁄4 FNPT 3000 SLM
Accessories
Model No. Description
FMA1600-C1
FMA1600-C1-25 FT
FMA1600-C2
FMA1600-C2-25FT
FMA1600-C3
FMA1600-CRA
FMA1600-MDB
FMA1600-PSU
Comes complete with 24 Vdc universal power supply, 1.8 m (6') cable, 8-pin male Mini-DIN connector, operator’s manual, and NIST certificate.
Units are calibrated to air @ 5 psig for 0 to 1 LPM, 15 psig for 2 to 10 LPM, 30 psig for 20 to 100 LPM, and 50 psig for 200 LPM and greater.
Calibrations done at ambient 25ºC (77ºF) temperature only.
To replace the standard RS232 communications with RS485, add suffix “-RS485” to the model number; for additional cost.
Standard input is 0 to 5V, for optional 4 to 20 mA input add suffix “-IN” to the model number; no additional cost.
Standard output is scaled to the mass flow rate. For volumetric flow rate as standard output add suffix “-VOL” to the model number; no additional cost.
Standard output is 0 to 5V, for optional 4 to 20 mA output, add suffix, “-I” to model number; for additional cost.
For two 4 to 20 mA output, add suffix “-I2” to model number; for additional cost.
For two 0 to 5V output, add suffix “V2” to model number; for additional cost.
**Optional secondary output are scaled the same as the primary output scale. For an alternate output scale add suffix “-T” to the model number
for temperature or “-P” for pressure; no additional cost.
For a portable version of the meter add suffix “-B” to the model number; for additional cost. Portable versions have an integral battery on the meter
and come with one 9V battery installed. Option not available on “-I” or “I2” models where 4 to 20 mA is the chosen output.
For units scaled in SCFH, add suffix “-SCFH” to model number; no additional cost. Please specify the desired range in SCFH.
For totalizer option, add suffix “-TOT” to the model number; for additional cost. Please specify resolution.
This is a 6-digit counter. Examples: For totalizing in liters with 1/100 liter resolution, the max count would be 9999.99. For totalizing in liters with
1 liter resolution, the max count would be 999999.
Ordering Examples: FMA-1601A, 0.5 SCCM mass flow meter.
FVL-1619A-VOL, 500 SCCM volumetric flow meter.
Replacement 8-pin male mini DIN connector cable, single ended, 1.8 m (6')
8-pin male mini DIN connector cable, single ended, 7.6 m (25')
8-pin male mini DIN connector cable, double ended, 1.8 m (6')
8-pin male mini DIN connector cable, double ended, 7.6 m (25')
8-pin male mini DIN to DB9 female adaptor, 1.8 m (6')
8-pin male right-angle mini DIN cable, single ended, 1.8 m (6')
Multi-drop box
Universal 100 to 240 Vac to 24 Vdc power supply adaptor
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