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LOW PRESSURE DROP MASS
GAS FLOW CONTROLLERS
For Clean Gases
FMA-LP2600A Series
U 130+ Gas Calibrations Including
Pure and Mixed Gases
U Pressure, Temperature, and Mass
Flow Simultaneously Displayed
U Easy-to-Use Pushbutton Interface
U NIST Traceability Standard
U Full Scale Ranges from
0.5 SCCM to 500 SLM
U Response Time of 50 to 100 ms Typical
U Turndown Ratio of 200:1
U Position Insensitive
U ±0.8% Reading Accuracy
U RS232 Standard
U Custom Live Gas Blend Programming
U Store Up to 20 User Defined Gas Blends
FMA-LP2612A
shown smaller
than actual size.
The FMA-LP2600A Series mass flow controllers use
the principle of differential pressure within a laminar
flow field to determine and control 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
centimeters per minute (SCCM) or standard liters
per minute (SLM).
The controller uses a true proportional valve coupled
to the flow body to control flow using the integral
PID loop controller. Standard units include a
0 to 5V output (4 to 20 mA optional) and RS232
communications. The gas-select feature and the
setpoints 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 46 m (150').
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Program Custom Mixed Calibrations for Bioreactors,
Chromatography, Welding, Lasers, Stack/Flue,
Fuel Gases and More
Absolute Pressure
Sensor
Differential Pressure
Sensor
Temperature
Sensor
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Exploded View of Internal
Laminar Flow Elements
SPECIFICATIONS
Accuracy: ±(0.8% of reading + 0.2% FS)
Repeatability: ±0.2% FS
Turndown Ratio: 200:1
Control Response Time: 100 ms
Input Control Signal: 0 to 5 Vdc, RS232
Output Signal: 0 to 5 Vdc, RS232
Optional Input/Outputs: 4 to 20 mA, 0 to 10 Vdc
Operating Temperature: -10 to 50°C (14 to 122°F)
Zero Shift: 0.02%/ATM FS/°C
Span Shift: 0.02%/ATM FS/°C
Humidity Range: 0 to 100% RH, non-condensing
Excess Flow Rate: 2.4% FS
Wetted Materials: 303 and 302 SS, FKM, silicone RTV
(rubber), glass-reinforced nylon, aluminum, brass, 410 SS,
silicone, glass; >250 SLM: 416 SS and nickel replace brass
Maximum Pressure: 50 psig
To Use in Volumetric Mode: Near atmosphere, 15 psig
recommended maximum. Volumetric flow meters and
controllers not certified for accuracy at mass flow rates
above the rated flow range of the meter. They are designed
for near atmospheric pressure conditions only. The
recommended maximum operating pressure is 15 psig
Supply Current: 0.250 A for 20 SLM and under; 0.75 A for
50 SLM and above (typical)
Supply Voltage: 15 to 30 Vdc for units 2 SLM and smaller;
24 to 30 Vdc for units 5 SLM and larger
Electrical Connections: 8-pin circular mini DIN
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Dimensions: mm (inch)
Flow Range
Pressure Drop at FS
psid venting to 1 ATM
Height
mm (inch)
Length
mm (inch)
Depth
mm (inch)
0.5 to 2 SCCM 0.06 99 (3.9) 86 (3.4) 28 (1.1)
5 to 10 SCCM 0.08 99 (3.9) 86 (3.4) 28 (1.1)
20 SCCM 0.07 99 (3.9) 86 (3.4) 28 (1.1)
50 to 200 SCCM 0.07 104 (4.1) 91 (3.6) 28 (1.1)
500 SCCM 0.08 104 (4.1) 91 (3.6) 28 (1.1)
1 SLPM 0.1 104 (4.1) 91 (3.6) 28 (1.1)
2 SLPM 0.18 104 (4.1) 91 (3.6) 28 (1.1)
5 SLPM 0.1 140 (5.5) 196 (7.7) 58 (2.3)
10 SLPM 0.12 140 (5.5) 196 (7.7) 58 (2.3)
20 SLPM 0.26 140 (5.5) 196 (7.7) 58 (2.3)
40 SLPM 0.14 140 (5.5) 196 (7.7) 58 (2.3)
50 SLPM 0.17 140 (5.5) 185 (7.3) 58 (2.3)
100 SLPM 0.3 140 (5.5) 185 (7.3) 58 (2.3)
250 SLPM 0.69 140 (5.5) 185 (7.3) 58 (2.3)
500 SLPM 0.69 140 (5.5) 206 (8.1) 69 (2.7)
Please allow approximately 44.5 mm (1.75") on top of the unit for electrical cable connection.
To Order
Mass Flow Meter 4 to 20 mA Output
Model No. Model No. Model No. Model No. Connection Flow
FMA-LP2601A FMA-LP2601A-I FMA-LP2601A-I2 FMA-LP2601A-V2 10 - 32 thread 0.5 SCCM
FMA-LP2602A FMA-LP2602A-I FMA-LP2602A-I2 FMA-LP2602A-V2 10 - 32 thread 1 SCCM
FMA-LP2614A FMA-LP2614A-I FMA-LP2614A-I2 FMA-LP2614A-V2 10 - 32 thread 2 SCCM
FMA-LP2615A FMA-LP2615A-I FMA-LP2615A-I2 FMA-LP2615A-V2 10 - 32 thread 5 SCCM
FMA-LP2603A FMA-LP2603A-I FMA-LP2603A-I2 FMA-LP2603A-V2 10 - 32 thread 10 SCCM
FMA-LP2616A FMA-LP2616A-I FMA-LP2616A-I2 FMA-LP2616A-V2 10 - 32 thread 20 SCCM
FMA-LP2604A FMA-LP2604A-I FMA-LP2604A-I2 FMA-LP2604A-V2 ¹⁄₈ FNPT 50 SCCM
FMA-LP2617A FMA-LP2617A-I FMA-LP2617A-I2 FMA-LP2617A-V2 ¹⁄₈ FNPT 100 SCCM
FMA-LP2618A FMA-LP2618A-I FMA-LP2618A-I2 FMA-LP2618A-V2 ¹⁄₈ FNPT 200 SCCM
FMA-LP2619A FMA-LP2619A-I FMA-LP2619A-I2 FMA-LP2619A-V2 ¹⁄₈ FNPT 500 SCCM
FMA-LP2620A FMA-LP2620A-I FMA-LP2620A-I2 FMA-LP2620A-V2 ¹⁄₈ FNPT 1 SLM
FMA-LP2605A FMA-LP2605A-I FMA-LP2605A-I2 FMA-LP2605A-V2 ¹⁄₈ FNPT 2 SLM
FMA-LP2606A FMA-LP2606A-I FMA-LP2606A-I2 FMA-LP2606A-V2 ¹⁄₄ FNPT 5 SLM
FMA-LP2607A FMA-LP2607A-I FMA-LP2607A-I2 FMA-LP2607A-V2 ¹⁄₄ FNPT 10 SLM
FMA-LP2608A FMA-LP2608A-I FMA-LP2608A-I2 FMA-LP2608A-V2 ¹⁄₄ FNPT 20 SLM
FMA-LP2609A FMA-LP2609A-I FMA-LP2609A-I2 FMA-LP2609A-V2 ³⁄₄ FNPT 50 SLM
FMA-LP2610A FMA-LP2610A-I FMA-LP2610A-I2 FMA-LP2610A-V2 ³⁄₄ FNPT 100 SLM
FMA-LP2611A FMA-LP2611A-I FMA-LP2611A-I2 FMA-LP2611A-V2 ³⁄₄ FNPT 250 SLM
FMA-LP2612A FMA-LP2612A-I FMA-LP2612A-I2 FMA-LP2612A-V2 ³⁄₄ FNPT 500 SLM
Two 4 to 20 mA Output
Two 0 to 5V Output Maximum
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Accessories for FMA-2600A Series
Model No. Description
FMA1600-C1 Replacement 8-pin male mini DIN connector cable, single ended, 1.83 m (6')
FMA1600-C1-25FT 8-pin male mini DIN connector cable, single ended, 7.62 m (25')
FMA1600-C2 8-pin male mini DIN connector cable, double ended, 1.83 m (6')
FMA1600-C2-25FT 8-pin male mini DIN connector cable, double ended, 7.62 m (25')
FMA1600-C3 8-pin male mini DIN to DB9 female adaptor, 1.83 m (6')
FMA1600-CRA 8-pin male right-angle mini DIN cable, single ended, 1.83 m (6')
FMA1600-MDB Multi-drop box
FMA1600-PSU Universal 100 to 240 Vac to 24 Vdc power supply adaptor
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
Standard 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.
For custom calibrations, add “-(*)” to the model number, no additional cost. * Specify gas, and inlet/outlet or backpressure for custom calibrations
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 5 V, for optional 4 to 20 mA input add suffix “-IN” to the model number, no additional cost.
Standard output is 0 to 5 V, 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 5 V 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 an integrated positive shut-off valve, add suffix “-P” to the model number, for additional cost. Models with the positive shut off valve have
¼" welded male VCR fittings. Available on models up to 20 SLM.
For units scaled in SCFH, add suffix “-SCFH” to model number. Please specify the desired range in SCFH, no additional cost.
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.
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