Product Overview
The SX-FVNB Series vortex flowmeter measures volumetric flow, standard volumetric flow, or mass flow of gases, steam, and liquids based on the Kármán vortex principle. It is suitable for saturated steam, superheated steam, general gases, liquids, compressed air, natural gas, oil and chemical fluids, industrial circulation, drainage, and wastewater treatment applications. The series is available in in-line and insertion-type configurations, with integral or remote-mounted converter options.
Main Features
- No Moving Parts —— Simple structure, easy installation and maintenance
- High Measurement Accuracy —— Liquid ±1.0 %; Gas ±1.5 %
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Stable Pulse Output —— Pulse output proportional to actual flow rate; highly stable
performance - Wide Measurement Range —— Turndown ratio up to 1:20 (in-line); 1:25 (insertion type) within Re 2×10⁴ – 7×10⁶
- Low Pressure Drop —— approximately 1/4 to 1/2 of an orifice plate meter under comparable conditions
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Anti-Vibration Design —— Noise suppression circuit and anti-vibration sensing element
- Low Power Consumption —— 1× 3.6V/10AH lithium battery operates > 1 year
- EEPROM Flow Accumulation —— Cumulative flow protected against power loss for > 10 years
- Software Linearity Correction —— Software-corrected non-linearity improves accuracy
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Temperature Options —standard fluid temperature up to +250 °C; high-temperature configuration up to +350 °C
Product Application
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Oil & Gas
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Compressed Air
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Chemical Processing
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Water & Wastewater
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Steam
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Industrial Pipelines
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Natural Gas Metering
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Technical Data
| Measurement | |
| Example Model | SX-FVNB-BC100AABAAAAA |
| Measurement Principle | Kármán vortex principle |
| Measured Media | Saturated steam / Superheated steam / General gases / Liquids |
| Nominal Diameter | DN15–DN300 (NPS 1/2"–12") |
| Gas Velocity Range | 7–40 m/s |
| Liquid Velocity Range | 0.7–7 m/s |
| Reynolds Number Range | 2×10⁴–7×10⁶ |
| Turndown Ratio | Up to 1:20 (in-line) / 1:25 (insertion type) |
| Accuracy & Repeatability | |
| Gas Accuracy | Class 1.5 (±1.5%) |
| Liquid Accuracy | Class 1.0 (±1.0%) |
| Gas Repeatability | 0.5% |
| Liquid Repeatability | 0.3% |
| Process Conditions | |
| Standard Fluid Temperature |
−40°C to +250°C |
| High-Temperature Version | 100°C to +350°C |
| Standard Working Pressure | 1.6 MPa (232 psi) |
| Optional Working Pressure | 2.5 MPa / 4.0 MPa (363 / 580 psi) |
| Environmental Conditions | |
| Ambient Temperature — Without LCD | −35°C to +60°C |
| Ambient Temperature — With LCD | −5°C to +60°C |
| Relative Humidity | 5–95% RH |
| Ingress Protection | IP65 (IEC 60529) |
| Process Connection & Materials | |
| Standard Connection | Flanged, EN 1092 / ASME B16.5 |
| Optional Connection | Wafer (Clamp) Type |
| Raised Face Connection | Available on request |
| Meter Body Material | 304 Stainless Steel |
| Optional Material | 316L Stainless Steel |
| Rated Pressure | 1.6 / 2.5 / 4.0 MPa |
| Configuration Options | |
| Display | With LCD / Without display |
| Power Options | Dual power / Lithium battery only / 24 VDC or 12 VDC |
| Output Options | No output / Pulse / 4–20 mA / RS485 |
| Sensor Material | 304 SS / 316L SS |
| Temperature Option | ≤280°C / ≤350°C |
| Pressure Class | 1.6 / 2.5 / 4.0 MPa |
Certifications & Compliance
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