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- Compact, small design
- Optionally with conventional analogueue signals
- All interfaces are freely programmable
- 04…20 mA and pulse or a Modbus RTU (RS 485) interface as standard
- Optional interfaces such as Modbus TCP (Ethernet), PoE, M-Bus available
- Pressure range up to 16 bar
- Temperature range up to 60°C
- Integrated display to show the measured values
- Available from 1/4″ to 2”
- Settings adjustable via the keys of the display
- Main counter can be reset via the display
- For speeds up to 224 Nm/s
- Highly accurate with an accuracy of ± 1.5% or ± 1% of the measured value – as well as ± 0.3% of the final value
Flow sensor with integrated flow straightener / no inlet selections necessary
The newly developed VA 525 combines modern digital interfaces for connection to an energy monitoring system with a small, compact design. Due to its reasonable price and modern digital interfaces this compact in-line flow sensor is used when many machines (compressed air consumers) are to be integrated as easily as possible into an energy monitoring network.
The high-contrast, integrated display also displays the current values rotated by 180° if desired (very useful for overhead installation). Depending on the configuration, two of the following values can be displayed:
- Measurement of mass flow rate, output of standard volume flow rate without additional measurement of pressure and temperature
- Compact device for installation in limited space, no inlet and outlet sections necessary thanks to integrated flow straightener
- Available with built-in pressure sensor
- Highly accurate at small as well as large flows
- No moving parts, therefore low maintenance
- Applicable for compressed air and nitrogen
Specs
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Product Specification
Below is the product specification of the Compact Compressed Air Flowmeter – Model VA525 from CS Instruments. If you require further information, please contact our expert customer service advisors on 01722 442 307.
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 table in data sheet
Accuracy: (o. M. V. = of measured value) (o. 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.
Pressure measurement:
0…16 bar, accuracy: 1%, or 10…2000 mbar (abs)
Operating temperature:
-20…60 °C
Operating pressure:
Up to 16 bar
Digital output:
RS 485 interface, (Modbus-RTU), M-Bus (optional) Ethernet interface or PoE
Analogue output:
4…20 mA for m³/h or l/min
Pulse output:
1 pulse per m³ or per litre electrically isolated. Pulse weight can be set on the display. Alternatively, the pulse 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


