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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.

Readout values in the display can be rotated by 180º, e.g. for overhead installation

The sensor can be removed from the measuring section and cleaned.
Unit of Measure

Financing

Approve Payments

 N/A Finance with Approve Payments

Specifications

Parameters

 N/A m³/h, CFM (1000 mbar, 20 ºC) in case of compressed air or Nm³/h, Nl/min (1013 mbar, 0 ºC) in case of gases

Units Adjustable Via Keys at Display

 N/A CFM ft/min g/s kg/h kg/min l/s lb/h lb/min m/s m³/h m³/min

Sensor

 N/A Thermal Mass Flow Sensor

Measured Medium

 N/A Air Gases

Gas Types are Adjustable Over CS Service Software or CS Data Logger

 N/A Air Argon CO2 Nitrogen Oxygen

Accuracy

 N/A ± 0.3% of Full Scale (F.S.) ± 1.5% of Measured Value (M.V.)

Accuracy on Request

 N/A ± 1.0% of Measured Value (M.V.) ± 0.3% of Full Scale (F.S.)

Operating Temperature

 N/A -22 to 176 ºF

Operating Temperature with Pressure Sensor

 N/A -25 to 349 ºF

Operating Pressure

 N/A Up to 232 psi

Optional Pressure

 N/A Up to 580 psi

Digital Output

 N/A Modbus-Remote Terminal Unit (RTU) RS 485 Interface

Optional Digital Output

 N/A Ethernet Interface M-Bus Power over Ethernet (PoE)

Analog Output for Cubic Feet Per Minute (CFM)

 N/A 4 to 20 mA

Pulse Output

 N/A 1 pulse per CF or per liter electrically isolated. Pulse weight can be set on the display. Alternatively, the pulse output can be used as an alarm relay.

Direct Current (DC) Supply Voltage

 N/A 18 to 36 V

Power Supply

 N/A 5 W

Burden

 N/A <500 Ω

Housing Material

 N/A Polycarbonate

Protection Rating

 N/A Ingress Protection (IP 65)

Material

 N/A Aluminum Stainless Steel 316L

Mounting Position

 N/A Any

Measuring Range

Measuring Section

 N/A DN15

Thread Size

 N/A G 1/2 in.

Measuring Range Full Scales

 N/A 90 m³/h50 ft³/min

Dimension L

 N/A 135 mm

Dimension B

 N/A 55 mm

Dimension H1

 N/A 50 mm

Dimension H

 N/A 109.65 mm

Dimension A1

 N/A 25 mm

Dimension A

 N/A 20 mm

Note for Measuring Range

 N/A Flow measuring ranges VA 521 (max version 185 m/s) for compressed air (ISO 1217:1000 mbar, 20 ºC)
Measuring ranges for other types of gas.

Display Shows 2 Values at the Same Time

Display Shows 2 Values at The Same Time

 N/A
  • Present flow in, CFM, l/min/m³/min
  • Total consumption (counter reading) in CF, l, kg
  • Temperature measurement

Screw-In Thread

Screw-In Thread

 N/A Easy installation into the existing pipe due to integrated measuring section (suitable for 1/2", 3/4", 1", 1 1/4", 1 1/2" or 2" lines)

Advantages at a Glance

Advantages at a Glance

 N/A
  • 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 to 20 mA analog output for present flow
  • Pulse output total flow (counter reading), electrically isolated. Optional: M-Bus, Ethernet interface or PoE
  • New: Integrated pressure sensor (optional)

With a Key Stroke

With a Key Stroke

 N/A
  • Reset counter reading
  • Select units
  • Parameterise interfaces