VA521 – Compact Inline flow meter for compressed air and other gas types
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- Modbus-RTU output
- Compact, small design - for use in machines
- NEW: As option, integrated pressure sensor
- 04…20 mA, pulse and a Modbus RTU (RS 485) interface as standard
- Optional interfaces: Modbus TCP (Ethernet), PoE, M-Bus
- Pressure range up to 40 bar
- Temperature range up to 80°C
- Integrated display to show the measured values
- Available from ½” to 2”
- Settings adjustable via the keys of the display
- Main counter can be reset via the display
- For velocities up to 224 Nm/s
- Extremely precise 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 sections necessary
The newly developed VA 521 thermal mass flowmeter combines modern digital interfaces for connection to an energy monitoring system with a small, compact design. The VA 521 flow meter is ideally suited for use when many machines (compressed air consumers) are to be integrated 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
The advantages at a glance
- Screw thread for easy installation in existing piping through integrated measuring block (suitable for 1/2“, 3/4 ̋, 1“, 1 1⁄4 ̋, 1 1⁄2“ or 2″ lines)
- Compact, small design – for use in machines, behind maintenance unit at the end user
- All interfaces are programmable via the display
- Modbus RTU output
- 4…20mA analog output for actual flow
- Pulse output total flow (counter reading), galvanically isolated. Optionally M-Bus, Ethernet-Interface, or PoE
Specs
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Product Specification
Below is the product specification of the VA521 – Compact Inline flow meter for compressed air and other gas types 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, gases
Gas types are adjustable over CS service software or CS data logger:
Air, nitrogen, argon, CO2, oxygen
Measuring range:
See table
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.
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
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:
< 500ohms
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