GFC and GFM Mass Flow Meters and Controllers

Mass Flow GFM Meters and GFC Controllers, designed to read or set gas flow rates, offer instrumentation grade ±1% accuracy for models up to 100 L. GFM and GFC models are constructed of aluminum and brass for non-corrosive gases and 316 stainless steel for corrosive applications.

Both Models combine the characteristics, and accuracy of conventional mass flow devices into a unique compact design at low costs previously unattainable. Each controller incorporates a "U"-shape tube sensor with flow passage elements constructed of aluminum and brass for non-corrosive gases or 316 stainless steel for corrosive applications. Zero and span adjustments are accessible from the outside of transmitters.

Compact, self-contained GFM mass flow meters are designed to read flow rates of gases. The rugged design coupled with instrumentation grade accuracy provides versatile and economical means of flow control. Aluminum or stainless steel models with readout options of either engineering units (standard) or 0 to 100% displays are available.


GFM mass flow meters are available with flow ranges from 10 sccm to 1,000 sL/min N2. Gases are connected by 1/4, 3/8, or 1/2 in. compression fittings and 3/4 in. FNPT fittings. (6, 9.5, or 13 mm and 19 mm)

GFC mass flow controllers are available with flow ranges from 10 sccm to 1,000 sL/min N2. Gases are connected by means of 1/4, 3/8, or optional 1/8 in. compression fittings and 3/4 in. FNPT fittings. (6, 9.5, or 3 mm and 19 mm).

• ?± 1% FS accuracy
• rigid metallic construction
• Flow range from 0 to 10 sccm up to 0 to 1,000 slpm
• Maximum pressure of 1000 psig (70 bars)
• Leak integrity 1 x 10^-9 sccs of helium
• NIST traceable certification
• Built-in tiltable LCD readout
• Local or remote setpoint control
• 0 to 5V DC and 4-20 mA signals
• Circuit protection
• Can be used as a portable device
• Engineering units or 0 to 100% displays
• Totalizer option