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Gas Mass Flow Controller, Up to 1000 L/min, Aluminum or 316 SS
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Series-GFC

Gas Mass Flow Controller, Up to 1000 L/min, Aluminum or 316 SS

  • Provides high accuracy and repeatability
  • Flow rates are virtually unaffected by temperature and pressure variations
  • Utilizes an electromagnetic valve and PID electronics to maintain continuous control by comparing measured sensor signal set to flow rates
  • Set points can be adjusted with local potentiometers or remotely via 0 to 5 VDC or 4 to 20 mA analog signal
  • Actual gas flow is displayed in engineering units on a 3-1/2 digit, 90° tiltable LCD readout
  • Can be used with Series GFT2 Flow Totalizer for applications requiring totalization
  • NIST traceable certificate included
Series-GFC
From AUD 8,182.92
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13 Variations available
See all series options below
Series-GFCData Sheet

Data Sheet
Gas Mass Flow Controller, Up to 1000 L/min, Aluminum or 316 SS Series-GFC Series-GFC
Product Overview
  • Accuracy Detail ± 1% FS including linearity over 59 to 77°F (5 to 25°C) and 5 to 60 psia (0.34 to 4 bar); Series GFC X143, X144, X145, ± 1.5% FS
  • Display Note 90° tiltable, 3-1/2 digit
  • Display Type LCD
  • Leak Rate Under Vacuum less than 10^⁻9 cc He/s
  • Media Compatibility Clean dry air / inert gas, Fuel gases, HVAC / room air, Inert / non-reactive gases, Hydrogen, Nitrogen, Non-Corrosive Dry Gases, Oxygen
  • Operating Temperature, Max 122 °F
  • Operating Temperature, Min 32 °F
  • Output Detail Linear 0 to 5 VDC and 4 to 20 mA
  • Output Signal Current, Voltage
  • Particulate Size, Max 5 microns
  • Measurement Pressure Type Gauge
  • Process Connection Type Compression Fitting
  • Repeatability ± 0.25%
  • Response Time 2 s
  • Response Time Note 2 s to within ± 2% of actual flow
  • Series ID Series-GFC
  • Supply Power Type DC
  • Supply Voltage ± 12 Vdc
  • Volumetric Flow Rate, Min 0 ml/min

Supported Applications

The Dwyer Series GFC Gas Mass Flow Controllers combine a straight tube sensor with a restrictor flow element to measure and control gas mass flow. The series is designed for clean gases compatible with the specified wetted parts.

  • Gases requiring measurement ranges from 0 to 10 mL/m up to 0 to 1000 L/min

Operating Conditions & Performance

The Series GFC operates within a process temperature range of 32 to 122°F (0 to 50°C). Accuracy is specified as ±1% FS including linearity over 59 to 77°F (5 to 25°C) and 5 to 60 psia (0.34 to 4 bar); for Series GFC X143, X144, and X145 models, accuracy is ±1.5% FS.

  • Repeatability: ±0.25% FS
  • Response time: 2 s to within ±2% of actual flow

The standard pressure rating is 1000 psig (68.9 bar). For Series GFC-X143, X144, and X145 models, the pressure rating is 500 psig (34.5 bar).

Configuration Options

The series offers a broad selection of flow ranges paired with specific process connection sizes to match system requirements.

  • Flow Ranges: Available from 0 to 10 mL/m through 0 to 1000 L/min, including intermediate steps such as 2 L/min, 5 L/min, 15 L/min, 30 L/min, 50 L/min, 100 L/min, and 200 L/min.
  • Process Connections:
    • 1/4" compression fitting for flow rates ≤50 L/m
    • 3/8" for 100 and 200 L/m ranges
    • 1/2" for the 500 L/min range
    • 3/4" for the 1000 L/min range
  • Housing Materials: Aluminum or 316 SS construction.
  • Wetted Materials:
    • GFC-1XXX models: Anodized aluminum, brass, 316 SS and fluoroelastomer O-rings
    • GFC-2XXX models: 316 SS and fluoroelastomer O-rings
  • Output Signals: Linear 0-5 VDC or Linear 4-20 mA.
  • Power Supply: ±12 VDC standard; optional GFC-110P (110 V power supply) and GFC-220PE (220 V power supply).

Accessories

  • GFC-CBL1: 8' cable with 15-pin connector
  • GFC-CBL3: 3' extension cable for LCD readout

Note: Specified flow ranges are for an equivalent flow of nitrogen at 70°F (21°C) @ 760 mm Hg.

Key Product Differences

The Series GFC is distinguished by two primary material families and specific model numbering conventions:

  • GFC-1XXX Models: Feature anodized aluminum housings with wetted parts including brass, 316 SS, and fluoroelastomer O-rings.
  • GFC-2XXX Models: Constructed entirely of 316 SS for the housing and wetted path (excluding fluoroelastomer O-rings).

The series includes specific model families designated as X143, X144, and X145. These models differ from standard configurations by having a pressure rating of 500 psig (34.5 bar) instead of the standard 1000 psig (68.9 bar), and an accuracy specification of ±1.5% FS.

Model numbers follow the format GFC-, such as GFC-1101, GFC-2101, GFC-1143, or GFC-2143.

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