Product information "VA 521 - Compact Inline flow meter for compressed air and other gas types "
No inlet section necessary – integrated flow straightener – sensor unit removable
The newly developed VA 521 combines modern digital interfaces for connection to energy monitoring systems with a small, compact design. The VA 521 is always used when many machines (compressed air consumers) are to be integrated into an energy monitoring network.
| Flow measuring ranges VA 521 (max version 185 m/s) for compressed air (ISO 1217: 1000 mbar, 20 °C) | |||||||||
| Measuring section | Thread | Measuring range full scales | L | B | H1 | H | A1 | A | |
| m3/h | (cfm) | mm | mm | mm | mm | mm | mm | ||
| DN 15 | G 1/2" | 90 | 50 | 135 | 55 | 50 | 109.65 | 25 | 20 |
| DN 20 | G 3/4" |
170 | 100 | 135 | 55 | 50 | 109.65 | 26 | 20 |
| DN 25 | G 1" | 290 | 170 | 135 | 55 | 50 | 109.65 | 33 | 25 |
| DN 32 | G 1 1/4" | 530 | 310 | 135 | 80 | 80 | 215.45 | 35 | 25 |
| DN 40 | G 1 1/2" | 730 | 430 | 135 | 80 | 80 | 215.45 | 36 | 25 |
| DN 50 | G 2" | 1195 | 700 | 135 | 80 | 80 | 215.45 | 44 | 30 |
For other gases same as Argon (Ar) , Carbon dioxide (CO2), Nitrous oxide (N2O) and Natural gas (NG) please contact us.
Advantages of VA 521:
- Compact, small design - for use in machines, behind maintenance unit on the end user
- All interfaces are freely programmable via the display
- Modbus-RTU output
- 4...20 mA analogue output for present flow
- Pulse output total flow (counter reading), electrically isolated. Optional: M-Bus, Ethernet interface or PoE
- NEW: As option, integrated pressure sensor
| Parameters | m³/h, l/min (1000 mbar, 20 °C) in case of compressed air or Nm³/h, Nl/min (1013 mbar, 0 °C) in case of gases |
| Units adjustable via keys at display | m3/h, m3/min, l/min, l/s, ft/min, cfm, m/s, kg/h, kg/min, g/s, lb/min, lb/h |
| Sensor | Thermal mass flow sensor |
| Measured medium | Air, gases |
| Gas types are adjustable over CS service software or CS data logger | Air, nitrogen, argon, CO2, oxygen |
| Measuring range | See Measuring range table |
| Accuracy (m.v: of meas. value) (f.s.: of full scale) | ±1.5% of m.v. ± 0.3% of f.s. on request: ±1% of m.v. ± 0.3% of f.s. |
| Operating temperature | -30…80 °C, -20...80 °C with pressure sensor |
| Operating pressure | Up to 16 bar, optionally 40 bar |
| Digital output | RS 485 interface, (Modbus-RTU),optional M-Bus, Ethernet interface or PoE |
| Analogue output | 4...20 mA for m3/h or l/min |
| Pluse output | 1 pulse per m3 or per litre electrically isolated. Pluse weight can be set on the display. Alternatively, the pluse output can be used as an alarm relay |
| Supply | 18...36 VDC, 5 W |
| Burden | < 500 Ω |
| Housing | Polycarbonate (IP 65) |
| Measuring section | Aluminium, 316L
|
| Connection thread of measuring sections |
G 1/2" to G 2" (BSP British Standard Piping) or 1/2" to 2" NPT thread
|
| Mounting position | any |
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