Bluetooth and CS SensorApp
Bluetooth is standard. The iOS and Android app finds all nearby sensors, shows live readings, curves and consumption, and enables remote service support.
New device
CS Instruments – VA 526
Compact. Connected. Future-proof. The new thermal mass inline flow sensor for compressed air and gases measures flow, consumption and temperature in one sensor – optionally pressure and dew point too.
| Measuring Principle: Thermal mass flow |
| Measured Medium: Compressed air, N₂, Ar, CO₂, O₂, N₂O (other gases on request) |
| Measuring Range: up to 1195 m³/h (DN 50, Max version 185 m/s) |
| Operating Pressure: up to 16 bar (optionally 40 bar) |
| Connections: G or NPT, 1/4" to 2" |
| Interfaces: Bluetooth (standard), 4–20 mA, Modbus-RTU, Ethernet/PoE, M-Bus, IO-Link |
| Options: Pressure and dew point measurement, flow straightener |
| Measuring Principle: Thermal mass flow |
| Measured Medium: Compressed air, N₂, Ar, CO₂, O₂, N₂O (other gases on request) |
| Measuring Range: up to 1195 m³/h (DN 50, Max version 185 m/s) |
| Operating Pressure: up to 16 bar (optionally 40 bar) |
| Connections: G or NPT, 1/4" to 2" |
| Interfaces: Bluetooth (standard), 4–20 mA, Modbus-RTU, Ethernet/PoE, M-Bus, IO-Link |
| Options: Pressure and dew point measurement, flow straightener |
- Compact inline design with measuring sectionMeasuring sections from 1/4" (DN 8) to 2" (DN 50) with G (BSP) or NPT thread.
- Thermal mass flow sensorMeasures flow, consumption (meter) and temperature; units m³/h, l/min for air (1000 mbar, 20 °C) or Nm³/h, Nl/min for gases.
- Colour display with rotationChoose the most important values to display; the view rotates in software for good readability in any mounting position.
- Bluetooth and CS SensorAppMeasuring point name, meter reset, units, gas type, zero point and averaging settings, live readings and export of consumption and leakage analyses.
- Built-in data logger50 MB of memory (about 2 years at a 10-minute interval).
- Supply and housing18…36 VDC, 5 W; IP65 polycarbonate housing; aluminium measuring block.
| Parameter | VA 526 |
|---|---|
| Measured Parameters | m³/h, l/min (1000 mbar, 20 °C) for compressed air; Nm³/h, Nl/min (1013 mbar, 0 °C) for gases |
| Configurable Units (CS SensorApp) | 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 |
| Thread | G 1/4" |
| Measuring range (air) [m³/h] | 6.3 (105 l/min) |
| Measuring range [cfm] | 3.6 |
| Length L [mm] | 135 |
| Width B [mm] | 50 |
| Height H [mm] | 86 |
| Accuracy (r.v. = reading value, f.s. = full scale) | ± 1.5 % r.v. ± 0.3 % f.s.; on request ± 1 % r.v. ± 0.3 % f.s. or ± 6 % r.v. ± 0.5 % f.s. |
| Pressure Measurement Accuracy | 1 % r.v. |
| Operating Temperature [°C] | −20 … +80 |
| Operating Pressure [bar] | up to 16 (optionally up to 40) |
| Digital Output | RS 485 (Modbus RTU), M-Bus (optional), Ethernet or PoE, IO-Link, Bluetooth |
| Analog Output | 4…20 mA for m³/h or l/min |
| Power Supply | 18 … 36 VDC, 5 W |
| Load | < 500 Ω |
| Housing | Polycarbonate (IP65) |
| Measuring Block | Aluminium or 316L stainless steel |
| Connection Thread | G 1/4" to G 2" (BSP) or 1/4" to 2" NPT |
| Mounting Position | Any |
| Data Logger | 50 MB (about 2 years at a 10-minute interval) |
Why Choose the VA 526?
4 values in one sensor
Flow and consumption plus temperature, optionally pressure (0–16 bar, 0–40 bar or 10–2000 mbar abs.) and humidity/dew point (−20…+50 °Ctd).
No inlet section
The optional integrated flow straightener creates a stable flow profile even right after a 90° elbow – for installation in the tightest spaces.
Every key interface
4–20 mA, Modbus-RTU (RS485), Ethernet with PoE (Modbus/TCP), M-Bus and IO-Link – for easy integration with energy monitoring and PLCs.
Robust, cleanable measuring tip
The sensor sits in the centre of the flow inside a stainless steel tube with baffles and is protected by a glass coating. The tip can be cleaned with water and a mild cleaning agent.
CRA-ready
Compliance with the EU Cyber Resilience Act is already implemented as standard.
Built-in data logger
50 MB of memory – enough for about two years of readings at a 10-minute interval.
Compact and robust
IP65 polycarbonate housing, aluminium or 316L stainless steel measuring block, any mounting position.
Energy
Energy MonitoringReliable measurement of air and gas flow rates to support energy monitoring and improve process efficiency.
Compressor Stations (FAD)
FAD MeasurementMeasurement of Free Air Delivery (FAD) directly in pipelines, even while the system remains in operation.
Chemical Industry
Process Flow MeasurementAccurate flow measurement of technical gases for stable and safe chemical processes.
Food Industry (N₂ / CO₂)
Inert GasesMonitoring nitrogen and CO₂ consumption in packaging, cooling, and protective atmosphere applications.
Automotive Industry
Production Line MonitoringReliable measurement of air and gas flow rates in manufacturing, assembly, and painting processes.
Aerospace Industry
Critical Flow MonitoringHigh measurement accuracy for monitoring flow rates in demanding and safety-critical applications.
Metallurgy and Welding
Shielding GasesMeasurement of shielding and process gas flow rates for stable welding and metallurgical processes.
Natural Gas and Steam
Process MediaMonitoring industrial gas and process media flow rates for energy and technological applications.
Measuring devices
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Fill in a short form and we will prepare a proposal for measurement equipment and implementation based on the medium, measuring range, and measurement objective.
Proposal of the right instrument type and measuring range
Measurement reports, trends, and interpretation of results
Supply, installation, calibration, and service
Where to find us
DirectionsPod lipami 4 · 1370 Logatec, Slovenija
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