Description
Overview
GAOTek gas mass flow meters are designed to indicate and control flow rates of gas. The rugged design coupled with instrumentation grade accuracy provides versatile and economical means of flow control. The built-in electromagnetic valve allows the flow to be set to any desired flow rate within the range of the particular model. The valve is normally closed as a safety feature to ensure that gas flow is shut off in case of a power outage. The LCD readout built into the top of the transducer is tiltable over 90 degrees to provide optimal reading comfort. GFC mass flow controllers are available with flow ranges from 10 SCCM to 2000 sL/min (N2). Gas is connected by means of 1/4 in compression fittings. These controllers may be used as benchtop units or mounted by means of screws in the base. Transducer power supply ports are fuse and polarity protected.
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Technical Specification
| Full scale range (N2) | (0 to 100, 200, 500, 1000) SCCM |
| Accuracy | ±1.0% S.P. (≥35% F.S.)
±0.35% F.S. (<35% F.S.) |
| Repeatability | ±0.2% FS |
| Linearity | ±0.5% FS |
| Response Time | ≤1 sec |
| Valve Rest Position | Normally Closed or Normally Open |
| Temperature Coefficient | Zero: ≤±0.05% F.S./ ℃
Span: ≤±0.1% F.S. ℃ (≤30 SLM) Span: ≤±0.2% F.S. ℃ (>30 SLM) |
| Zero Drift | <0.6% F.S. per year without auto zero |
| Surface Finish | 25 Ra |
| Operation Temperature | 41 °F to 113 °F (5 ℃ to 45 ℃) |
| Communication Interface for input Signal | Digital: RS 485
Device Net TM Analog: 0 V to 5 V DC or 4 mA to 20mA |
| Communication Interface for Output Signal | Digital: RS 485
Device Net TM Analog: (0 V to 5 V DC or (4 mA to 20 mA |
| Power Supply | ±11 V to ±16 V DC or +11 V to +28 V DC 400 mA) |
| Electronic Connector | D sub 9 pins male, D sub 15 pins male,
DeviceNet TM male |
| Differential Pressure | 0.05 Mpa to 0.35 Mpa (≤10000 SCCM)
(0.1 Mpa to 0.35 Mpa (20000 SCCM, 30000 SCCM) 0.2 Mpa to 0.45 Mpa (50000 SCCM) |
| Max Pressure | 435.113 PSI (3 MPa) |
| Seals Materials | Viton, Neoprene |
| Fittings | Swagelok 1/4 in |
| Weight | 2.20 lb (1 kg) |