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Mass Flow Controllers with 20+ Gas Select Function

Item# FMA-2601A

Mass Flow Controllers with 20+ Gas Select Function FMA-2601A FMA-2601A
  • 130+ Gas Calibrations, Including: He, O2 , Neon, N2O, N2, Air, Argon, CO, CO2, Methane, Ethane, Propane, Butane, Acetylene, Ethylene, H2
  • Pressure, Temperature, Volumetric Mass Flow Simultaneously Displayed
  • Easy Operator Push Button Interface
  • NIST Traceability Standard
  • Full Scale Ranges from 0.5 SCCM to 3000 LPM
  • Response Time of 100 milliseconds Typical
  • Turndown Ratio of 200:1 Typical
  • Position Insensitive
  • Accuracy: ±(0.8% of reading + 0.2%FS)
  • RS232 Standard
  • No Warm Up Time
Flow Measuring Range
Accuracy Value
Retransmission/Analog Output
Housing Material
Communications Protocol
Flange Type
Display Type
Media Type
See All Options
Quantity Price each
1-4 $2,440.00
5-9 $2,318.00
10-24 $2,269.20
25-49 $2,171.60
50-99 $2,122.80
100+ $2,074.00

In stock

Lead Time ( If not in Stock): 4 weeks

Product Specs

  • Accuracy Value ±(0.8% of reading + 0.2% FS)
  • Connection Type 8-pin circular mini DIN
  • Maximum Ambient Humidity 100% RH
  • Maximum Ambient Temperature 50°C (122°F)
  • Minimum Ambient Humidity 0% RH
  • Measurement Type Flow
  • Minimum Ambient Temperature -10°C (14°F)
  • Pulse Output 0 to 5 Vdc
  • Response Time 100 ms
  • Supply Voltage 12 to 30 Vdc for units 20 SLM and smaller
  • Wetted Materials Small Valve: 303 & 302 Stainless Steel
  • Turndown Ratio 100:1
  • Zero Shift 0.02%/ATM FS/°C
  • Repeatability ±0.2% FS

The FMA-2600A Series mass and volumetric 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 feet per minute (SCFM) 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 5 V 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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