Series GFC Gas Mass Flow Controllers combine a straight tube sensor with a restrictor flow element to provide high accuracy and repeatability. Flow rates are virtually unaffected by temperature and pressure variations. Gas mass flow controllers utilize an electromagnetic valve and PID electronics to maintain continuous control by comparing measured sensor signal set to flow rates. Setpoints 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. Units can be used with Series GFT Flow Totalizer for applications requiring totalization. Series GFC includes a NIST traceable certificate.

SPECIFICATIONS
Service: Clean gases compatible with wetted parts.
Wetted Materials: GFC-1XXX: Anodized Aluminum, Brass, 316 SS and Fluoroelastomer O-rings; GFC-2XXX: 316 SS and Fluoroelastomer O-rings.
Accuracy: ±1.5% FS including linearity over 59 to 77°F (5 to 25°C) and 5 to 60 psia (0.35 to 4 bar).
Repeatability: ±0.5% of full scale.
Response Time: 2 seconds to within ±2% of actual flow.
Output: Linear 0-5 VDC and 4-20 mA.
Max. Particulate Size: 5 microns.
Temperature Limits: 32 to 122°F (0 to 50°C).
Power Supply: ±12 VDC.
Process Connections: 1/4" compression fitting for flow rates =50 L/m; 3/8" for 100 and 200 L/m; 1/2" for 500 L/min; 3/4" for 1000 L/min.
Pressure Limits: 500 psig (34.5 bar).
Leak Integrity: 1 x 10^-7 sccs of Helium.
Display: 90° tiltable, 3-1/2 digit.
Agency Approvals: CE.

ACCESSORIES - See "Ordering" page

For Series GFC Gas Mass Flowmeters
GFC-110P - 110V Power Supply
GFC-220PE - 220V Power Supply
GFC-CBL1 - 8 ft cable with 15-pin connector
GFC-CBL3 - 3 ft extension cable for LCD readout
IO-1 - 0-5 VDC to RS232 Input to Output Signal Conditioner