The Aalborg Instruments GFM 671 is a thermal mass flow meter designed for accurate gas measurement, utilizing pressure- and temperature-compensated measuring systems. It features a sensor measuring device made of aluminum, with media wetted parts consisting of aluminum, brass, stainless steel (316 SS), and Viton o-rings. The unit offers measuring ranges from 0 - 300 l/min to 0 - 500 l/min based on nitrogen at 20°C and 1 bar absolute, with a maximum measuring range of 0 - 500 SLPM. It includes a 3 1/2 digit swivel LCD flow meter mounted directly on the device, providing linear output signals of 4-20 mA and 0-5 VDC. The GFM 671 operates at a max operating pressure of 34.5 bar overpressure and a medium temperature range from 0°C to +50°C. It requires a power supply of 12 - 26 Vdc (200 mA) and connects via 2 x 1/2" cutting ring screwing. Please specify the measuring range and gas type.
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| Manufacturer | Aalborg Instruments |
|---|---|
| Country | |
| Part number | GFM 671 |
| Inner Code | 4287927 |
| Product type | Thermal Mass Flow Meter |
|---|---|
| Sensor measuring device | aluminum |
| Medium temperature range | 0°C to +50°C |
| Max. operating pressure | 34.5 bar overpressure |
| Power supply | 12 - 26 Vdc (200 mA) |
| Measuring range ratio | 1:100 |
| Standard conditions (N) | 20°C and 1 bar abs. |
| Display | 3 1/2 digit swivel LCD flow meter |
| Accuracy | +/- 1.5% of measuring range endvalue at 15°C to 25°C and 0.35 bar to 4.1 bar abs., otherwise +/- 3% of the measuring range endvalue |
| Reproducibility | +/- 0.25% of final value |
| Response time | 2 seconds at 25% to 100% |
| Media wetted parts | aluminum, brass, stainless steel (316 SS) and Viton o-rings |
| Process connection | 2 x 1/2" cutting ring screwing |
| Measuring ranges | 0 - 300 l/min to 0 - 500 l/min |
| Output signal | 4.. 20 mA and 0.. 5 VDC linear |
| Medium | N2 gas |