Variable Area Flowmeter
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AVF250 Series
The AVF250 Series flowmeter is designed for on-site analog flow indication, ideal for measuring small volumes and wide ranges of liquids, gases, and steam. It features a 5-digit flow rate and a 7-digit totalizer with integrated temperature and pressure compensation. The meter provides local indication without auxiliary power, along with 4-20 mA and scaled pulse outputs. It ensures low pressure loss in gas and steam applications, includes a damper for stability, and offers consistent overall length. Additional features include a heating jacket design and intrinsic safety with explosion-proof capabilities for hazardous areas.
Technical Specifications
| Size | 15,20,25,40,50,65,80,100,125,150,200 mm |
|---|---|
| Measuring Range | Liquid _1~200000 L/hr |
| Turndown Ratio | 10:1 (20:1 Optional) |
| Accuracy | +/-1.6% (Standard) |
| Repeatability | +/-0.5% FS |
| Material | Tube & Float: Stainless Steel 304, Stainless Steel 316 |
| Standard Pressure | 40 kgf/cm2 (15-50 mm) |
| Temperature | 0-100 °C (Standard) |
| Flange Type | JIS 10K / JIS 20K / JIS 40K |
| Fluid Viscosity | 300 cP Max. |
| Communication | RS485 (MODBUS Protocol) |
| Local Display | Mechanical Indicator (Standard) |
| Current Output | 4-20 mA (2-Wire) |
| Pulse Output | Open collector (Scaled pulse) |
| Data Storage | Operation parameters and totalizer figures are stored by EEPROM for more than 10 years |
| Limit Switches | 2-Wire NAMUR (For Exia / Exd) |
| Keypad | 3 Internal keys for programming and display control |
| Ambient Temperature | -25~60 °C |
| Protection Class | IP65 |
| Housing Material | Aluminum Alloy |
| Cable Entry | Standard: M20 Option: 1/2" NPTF |
| Pressure Loss | 0.07-0.7 kgf/cm2 |
| Power Supply | 12-32 VDC |
| Option | Temp. & Pressure compensation |
