Dwyer GFM Series Gas Mass Flow Meter & Controllers

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Dwyer GFM Series Gas Mass Flow Meter & 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. 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 GFM includes a NIST traceable certificate. Flow Range Up to 1000 L/min, Pressures Up to 1000 psi, NIST Traceable.

Note: These units require a cable, see GFM-CBL4 or GFM-CBL5, depending on your needs.

Dwyer GFM Series Features

LCD Display
Flow Range Up to 1000 L/min, Pressures Up to 1000 psi, NIST Traceable
Actual gas flow is displayed in engineering units on a 3-1/2 digit, 90° tiltable LCD readout

Specification

Service	Clean gases compatible with wetted parts.
Wetted Materials	GFM-1XXX: anodized aluminum, brass, 316 SS and fluoroelastomer o-rings; GFM-2XXX: 316 SS and fluoroelastomer o-rings.
Accuracy	±1% FS including linearity over 59 to 77°F (5 to 25°C) and 5 to 60 psia (0.34 to 4 bar); Series X143, X144, X145, ±1.5% FS.
Repeatability	±0.25% of FS.
Response Time	2 seconds to within ±2% of actual flow.
Output	Linear 0-5 VDC and 4-20 mA.
Maximum 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	1000 psig (68.9 bar); Series GFM-X143, X144, X145, 500 psig (34.5 bar).
Leak Integrity	1 x 10^-9 sccs of Helium.
Display	90° tiltable, 3-1/2 digit.
Agency Approvals	CE.