DWYER GFM2 gas mass flow meter

Description of DWYER GFM2

PRODUCT APPLICATIONS

• Gas flow measurement
• Gas glow control
• Operating pumps and valves
• Process equipment
• Vacuum processes
• Glass and metal coating
• Film deposition

FEATURES

• Utilizes a straight tube sensor with a restrictor flow element to provide a high ±1% FS accuracy and ±0.25% FS repeatability
• Gas flow can be displayed in 23 different engineering units on an optional 2×16 character LCD display with internal conversion factors for up to 32 gases
• Digital RS-232 or RS-485 interfaces allow for easy communication and for multi-drop capability of up to 256 units (RS-485 only)
• User-friendly interface allows for the programming of high and low gas flow alarms, along with two user-programmable electromechanical SPDT relays with latch options
• Stores calibration information for up to 10 different gases, internal or user-specific K-factors
• Automatic sensor zero offset adjustment (via digital interface or local push button)
• NIST traceable certificate included
• Self-diagnostic tests

Technical specifications of DWYER GFM2

• Service: Clean gases compatible with wetted parts.
• Wetted Materials:
  GFM2-X-X-A: Anodized aluminum, brass, 316 SS fluoroelastomer O-rings
  GFM2-X-X-S: 316 SS, and fluoroelastomer O-rings; Buna-N, EPR and PTFE O-rings optional.
• Accuracy: ±1% FS.
• Repeatability: ±0.25% FS.
• Response Time: 2 seconds to within ±2% of actual flow.
• Output Signal: Linear 0 to 5 VDC (3000 Ω min. load impedance) and 4 to 20 mA (500 Ω max. loop resistance).
• Relay Rating: 1 A @ 24 VDC.
• Max. Particulate Size: 5 microns.
• Temperature Limits: 32 to 122°F (0 to 50°C).
• Power Supply: 11 to 26 VDC.
• Process Connections: 1/8″ compression fitting for flow rates ≤10 L/min; 1/4″ for ≤50 L/min; 3/8″ for ≤100 L/min.
• Display: 2 x 16 character LCD (optional).
• Pressure Limits: 500 psig (34.5 bar).
• Leak Integrity: 1 x 10-9 smL/sec of helium.
• Weight: 1.05 lb (0.48 kg).

Model Chart DWYER GFM2