VA 500 - Flow sensor for compressed air and gases

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VA 500 - Flow sensor for compressed air and gases

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VA 500 - Flow sensor for compressed air and gases Specification

Equipment Type
Thermal Mass Flow Sensor

Resolution
0.001 Nm/h

Port Size
1/2 (DN 15), 1 (DN 25), 2 (DN 50), and other sizes available

Temperature
Medium: -30C to +110C; Ambient: 0C to +50C

Mounting Type
Insertion type

Display Type
Backlit LCD, graphical display

Operating Voltage
1836 V DC

Features
Bidirectional measurement, easy installation, IP65 protected, menu operation via touch buttons

Power Supply
1836 V DC

Gas Pressure
Max. 16 bar (depending on sensor variant)

Automation Grade
Automatic

Response Time
t90 < 1s

Measuring Range
0.25 to 825 Nm/h depending on probe and pipe diameter

Accuracy
1.5% of m.v. 0.3% of f.s.

Interface Type
420 mA output, Modbus RTU, pulse output, optional relay

Application
Measurement of compressed air and technical gases

Humidity
095% RH (non-condensing)

Usage
Inline or insertion flow measurement in pipes/ducts

Machine Weight
Approx. 0.5 kg (sensor only)

Control Mode
Digital/Analog Output control

Cable Length
Up to 10 m (depending on version)

Media Compatibility
Compressed air, nitrogen, oxygen, argon, CO2, other non-corrosive gases

Sensor Material
Stainless Steel 1.4301 (probe), others on request

Protection Class
IP65

Mounting Accessories
Welding socket, positioning adapter, ball valve for sensor removal under pressure

Comm. Options
Optional RS485, Modbus RTU

Electrical Connection
M12, 5-pin, A-coded

Display Functions
Flow, totalizer, temperature

Operation
Menu driven, multilingual

Calibration
Five-point factory calibration certificate included

Pressure Loss
Negligible due to no moving parts

Process Connection
1/2" ball valve for hot tap (optional)

Data Storage
EEPROM, retentive for configuration and counter values

Probe Lengths
120/160/220/300/400 mm

About VA 500 - Flow sensor for compressed air and gases

Special features of flow sensor VA 500:

RS 485 interface, Modbus-RTU as a standard
Option integrated display for m/h and m
Usable from 1/2 to 12 (DN 300)
Easy installation under pressure
4...20 mA analogue output for m/h resp. m/min
Pulse output for m
Inner diameter adjustable via keypad
Consumption counter resettable
Adjustable values at the display of the flow sensor: Reference conditions, C and mbar, 4...20 mA scaling, pulse weight

Robust and Flexible Measurement Solutions

The VA 500 flow sensor is engineered with stainless steel for durability and reliability, making it ideal for industrial environments. Compatible with a range of gases and supplied with a five-point calibration certificate, it ensures accurate measurements across different media and conditions.

User-Friendly Operation and Installation

Featuring a large backlit LCD display and multilingual, menu-driven controls, the VA 500 simplifies on-site operation. Its insertion-type design, optional hot tap ball valve, and range of probe lengths enable straightforward installation and sensor maintenanceeven under pressure.

Advanced Output and Communication Capabilities

The sensor supports multiple output and communication options, including analog (420 mA), digital, Modbus RTU, and pulse signals, ensuring seamless integration with diverse automation and monitoring systems. Configuration and data retention are supported by robust EEPROM storage.

FAQs of VA 500 - Flow sensor for compressed air and gases:

Q: How do I install the VA 500 flow sensor into existing compressed air or gas pipelines?

A: The VA 500 is designed for insertion mounting and can be installed quickly using a welding socket or positioning adapter. For installations where shutting down the process is not possible, the optional 1/2" ball valve enables safe hot tap sensor insertion and removal under pressure.

Q: What gases can the VA 500 accurately measure, and are there material compatibility concerns?

A: This flow sensor reliably measures compressed air, nitrogen, oxygen, argon, CO2, and other non-corrosive gases. Its probe is made from stainless steel 1.4301, suitable for these media. For special or corrosive gases, alternative materials may be available on request.

Q: When should the VA 500 be used for gas flow measurement?

A: The VA 500 is ideal when precise measurement of gas or compressed air flow and consumption is required, such as in energy monitoring, leak detection, and process optimization within industrial settings. Its broad measuring range, high accuracy, and five-point calibration ensure dependable results.

Q: Where can the VA 500 be installed within an industrial environment?

A: This sensor can be installed in pipes or ducts handling compatible gases, in line or as an insertion device. With probe lengths from 120 to 400 mm and port sizes from 1/2" to 2" (and others), it adapts to a variety of pipeline diameters commonly found in factories and processing plants.

Q: What operational benefits does the VA 500 provide compared to traditional flow meters?

A: With its non-moving parts, the VA 500 offers negligible pressure loss, reducing energy waste. Its digital outputs, fast response time (t90 < 1 s), accurate bidirectional measurements, and menu operation simplify integration and maintenance, while its protective IP65-rated housing supports use in harsh industrial environments.

Q: How does the VA 500 handle configuration and long-term data integrity?

A: All configuration and counter values are securely stored in EEPROM memory, ensuring settings and measurements are retained even in the event of power loss. This supports reliable, uninterrupted data tracking for process monitoring and control.

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