Dwyer GFM2 Series Gas Mass Flow Meter and Controllers

Dwyer GFM2 Series Gas Mass Flow Meter and Controllers

Dwyer GFM2 Series Gas Mass Flow Meter and Controllers is an ideal choice for the measurement of flow rates of a wide variety of gases. Unit can be calibrated for a variety of gases with user selectable 0 to 5 VDC or 4 to 20 mA and two relay outputs and programmable totalizer that indicates total gas quantity.

The Series GFM2 Gas Mass Flow Meter is an ideal choice for the measurement of flow rates of a wide variety of gases. GFM2 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. Digital RS-232 or RS-485 interfaces allow for easy communication and for multi-drop capability of up to 256 units (RS-485 only).

Additionally, this user-friendly interface allows for the programming of high and low gas flow alarms, along with two electromechanical SPDT relays with latch options. Stores calibration information for up to 10 different gases, internal or user-specific K-factors. Comes standard with support software for programming the various parameters of the GFM2. With self diagnostics run at start up and a pressure limit of up to 500 psi (34.5 bar), the GFM2 is the optimal choice for many flow measurement application. The GFM2 includes a NIST traceable certificate.

Dwyer GFM2 Series 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

Application

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

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Dwyer GFM2 Series Specification

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).

Download Data Sheet: Series GFM2 Gas Mass Flow Meter and Controllers

Ref: dwyer-inst.com

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