Dwyer Series GFM

Series GFM Gas Mass Flow Meter

Flow Range Up to 1000 L/min, Pressures Up to 500 psi, NIST Traceable

The Dwyer Series GFM Gas Mass Flow Meters 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.

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

Dwyer Series GFM Specifications

• 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: ±0.5% of full scale.
• 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: 12-26 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.

Available Models

Available Accessories

• Model GFM-110P 110 V power supply.
• Model GFM-220PE 220 V power supply.
• Model GFM-CBL4 3 ft cable for 4-20 mA output.
• Model GFM-CBL5 4 ft cable for 0-5 VDC output.