1 /
4
VA500 Insertion flow sesnor
Germany- CS instruments
Description：
The VA500 Thermal Mass Flow Meter from CS Instruments Germany is designed for measuring the flow of compressed air and various gases. The flow meter features a hot-swappable installation design, allowing the sensor to be inserted or removed at any time without system shutdown, while still providing accurate measurement of all types of dry gases.
The VA500 Thermal Mass Flow Meter operates based on the principle that a flowing gas or liquid carries away heat. As the fluid passes over a heated sensor element, it removes heat, causing a temperature change. By measuring this temperature change, or by determining the amount of energy required to maintain a constant temperature of the heating element, the flow rate of the fluid can be precisely calculated.
Download file
Gases Measured
- Compressed air (from air compressors)
- Nitrogen (N₂)
- Natural gas flow
- Liquefied petroleum gas (LPG) flow
- Carbon dioxide (CO₂)
- Argon (Ar)
- Biogas
- Vacuum
Advantage
- Insertion design: Enables quick on-site installation, removal, and maintenance without interrupting the pipeline system.
- Direct mass flow measurement: Measures mass flow directly, requiring no temperature or pressure compensation.
- High accuracy: Provides excellent measurement precision, especially in low flow ranges.
- Wide applicability: Suitable for various gases and liquids, and capable of measuring very low flow rates.
- No moving parts: Designed with no mechanical moving components, making it wear-resistant and low-maintenance.
Technical data
- Accuracy: ±1.5% of measured value (m.v.)
- Power supply: 18…36 VDC, 5 W
- Communication interfaces: 4–20 mA, Pulse, Modbus RTU (RS485), Modbus TCP (Ethernet), PoE
- Pressure resistance: Up to 50 bar
- Temperature range:
Sensor: -30…+110 °C
Built-in pressure sensor model: -20…+85 °C
Housing: -20…+70 °C - Protection rating: IP65
- Probe material: Stainless steel (1.4301)
- Insertion lengths: 220 mm, 300 mm, 400 mm; Ø10 mm
- Installation range: Suitable for pipe diameters from ½" to 40"
- Optional features:
Bidirectional flow measurement and totalizer
Integrated pressure measurement function (data accessible via communication interface)
