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VA 550 - Thermal mass flow sensor for flow measurement

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PRODUCT DETAILS

This insertion thermal mass flow meter is designed for applications with high cleanliness requirements and harsh industrial environments. All wetted parts are manufactured from stainless steel, ensuring excellent surface quality and suitability for demanding gas applications.

The robust aluminium housing allows reliable operation under tough industrial conditions. Thanks to ATEX and DVGW approval, the device is especially recommended for flammable gases such as natural gas, hydrogen, biogas, and similar media.

The instrument measures mass flow directly and provides standardized volume flow output, with automatic pressure and temperature compensation based on the thermal mass flow principle. Installation is quick and simple via a standard ½" ball valve, enabling mounting under pressure without interrupting operation.

With no moving parts, the flow meter is low maintenance and ensures an extremely low pressure loss due to negligible blockage of the pipe diameter.

KEY FEATURES & BENEFITS

Stainless steel wetted parts for high cleanliness and surface quality

Robust aluminium housing for harsh industrial environments

ATEX and DVGW approved for flammable gases

Direct mass flow measurement with standardized volume flow output

High accuracy at both low and high flow rates

Pressure and temperature compensated via thermal mass flow principle

Easy installation via ½" ball valve, even under pressure

No moving parts for low maintenance

Vanishingly low pressure loss

TECHNICAL SPECIFICATIONS

Pressure range: up to 50 bar

Special version: up to 100 bar

Media temperature: up to 180 °C

ATEX version temperature: up to 120 °C

Protection class:

IP 67

IP 64 (ATEX II 2D Ex tb IIIC T90°C Db)

Flow velocity: up to 224 Nm/s

Pipe sizes: 3/4" to DN 1000 (insertion version)

Measurement accuracy:

±1.5% or ±1% of measured value

plus ±0.3% of final value

OUTPUTS & INTERFACES

Standard outputs:

4...20 mA analogue output

Pulse output

Modbus RTU (RS 485)

Optional interfaces:

Modbus TCP (Ethernet)

Power over Ethernet (PoE)

M-Bus

DISPLAY & OPERATION

Integrated display for measured values

Parameter settings adjustable via display buttons

Main counter reset directly via the display

Name File Name
Data_sheet_accessories_flow_EN (2) Data_sheet_accessories_flow_EN (2).pdf
Data_sheet_VA550_EN Data_sheet_VA550_EN.pdf
overview_of_products_VAxx_EN (2) overview_of_products_VAxx_EN (2).pdf

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