



















No inlet section necessary – integrated flow straightener – optional pressure sensor
The innovative VA 525 combines modern digital interfaces for connection to an energy monitoring system with a small, compact design. The VA 525 is always used when many machines (compressed air consumers) have to be integrated into an energy monitoring network.
Reduce your energy costs and increase your sustainability with the VA 525 compact sensor. Monitor the consumption of individual machines and analyze your leakage flows with just one measuring device.
Flow measuring ranges VA 525 (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 | A | |
m3/h | (cfm) | mm | mm | mm | mm | mm | ||
DN 8 | G 1/4" | 105 I/min | 3.6 | 135 | 55 | 50 | 109.1 | 15 |
DN 15 | G 1/2" | 90 m3/h | 50 | 135 | 55 | 50 | 109.1 | 20 |
DN 20 | G 3/4" |
170 m3/h | 100 | 135 | 55 | 50 | 109.1 | 20 |
DN 25 | G 1" | 290 m3/h | 170 | 135 | 55 | 50 | 109.1 | 25 |
DN 32 | G 1 1/4" | 530 m3/h | 310 | 135 | 80 | 80 | 139.1 | 25 |
DN 40 | G 1 1/2" | 730 m3/h | 430 | 135 | 80 | 80 | 139.1 | 25 |
DN 50 | G 2" | 1195 m3/h | 700 | 135 | 80 | 80 | 139.1 | 30 |
Advantages of VA 525:
- Compact, small design - for use in machines, behind maintenance unit on the end user
- Optionally with conventional analogueue signals (4…20 mA and pulse) or digital interfaces such as Modbus-RTU, Ethernet (also PoE), M-Bus
- All interfaces are freely programmable via the display
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 |
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. or ± 6% of m.v. ± 0.5% of f.s. |
Operating temperature | -20…60 °C |
Operating pressure | Up to 16 bar |
Pressure measurement | 0…16 bar, accuracy: 1%, or 10…2000 mbar (abs) |
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 |
Connection thread of measuring sections |
G 1/4" to G 2" (BSP British Standard Piping) or 1/2" to 2" NPT thread
|
Mounting position | any |
All articles in this group