Flow sensor with integrated flow straightener / no inlet sections 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:

• Current consumption in m³/h, l / min, …
• Total consumption (meter reading) in m³, l, kg
• Temperature measurement
• Optional: Pressure measurement

Special Features

• Compact, small design – for use in machines, behind maintenance unit at the end user
• Optionally with classic analogue signals (4…20 mA and pulse) or digital interfaces such as Modbus RTU, Ethernet (also PoE), M-Bus
• All interfaces are 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, gases
Gas types are adjustable over CS service software or CS data logger:	Air, nitrogen, argon, CO2
Measuring range	See table above
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