CS INSTRUMENTS VA 500 Consumption sensor with RS 485 (Modbus-RTU) interface, with analog output 4-20mA
The VA 500 is a precise flow meter for compressed air and non-corrosive gases. It offers easy installation via a ½" ball valve and is characterized by high accuracy, minimal pressure loss and low maintenance. With a pressure range up to 50 bar and a temperature range up to 110°C as well as a wide range of interfaces, the VA 500 is ideal for efficiently monitoring your energy costs and reducing CO2 emissions.
CS Instruments
As a leading manufacturer of compressed air measurement technology, CS INSTRUMENTS stands for highest quality and innovation. "Made in Germany" is our practice - development, production, and calibration take place exclusively in Germany.
VA 500 - Flow meter for compressed air and gases
The VA 500 is the tailor-made solution for precise flow monitoring in compressed air and gas applications. This powerful measuring device enables you to record and reduce energy costs, lower CO2 emissions and increase your sustainable practices. With the VA 500, you can analyze your consumption and identify leakage flows - all with a single device. Thanks to its compact design, the VA 500 is ideal for mobile measurements.
Product details:
- Setting measured values: The VA 500 measures the mass flow and outputs the standard volume flow directly.
- Highly accurate: It ensures precise measurements for both small and large flow rates.
- Stability: Thanks to the thermal mass flow principle, the device is pressure and temperature compensated.
- Easy installation: The device can be installed quickly and easily using a standard ½" ball valve.
- Low maintenance: Due to the design without moving parts, the VA 500 requires little maintenance and offers extremely low pressure loss due to minimal blockage of the diameter.
- Variety of applications: The VA 500 is suitable for both compressed air and non-corrosive gases such as nitrogen, oxygen, argon and helium.
- Interfaces: Equipped with 04...20 mA, Pulse and a Modbus RTU (RS 485) interface as standard; optional interfaces such as Modbus TCP (Ethernet), PoE and M-Bus available.
- Optional: Bi-directional measurement for even more flexibility.
- Pressure and temperature range: Operating pressure up to 50 bar and temperature range up to 110°C.
- Protection class: IP65 for reliable operation under various conditions.
- Integrated display: Shows the measured values clearly and concisely; settings can be changed directly using the buttons on the display.
- Flexible application sizes: Suitable for pipe diameters from DN15 to DN1000, larger diameters available on request.
- Easy to use: The main counter reading can be reset directly via the display.
- High speed: For flow rates of up to 224 Nm/s.
- Precision: With a high accuracy of ± 1.5% or ± 1% of the measured value and ± 0.3% of the final value, the VA 500 impresses in every application.
Optimize your energy efficiency and actively contribute to environmental protection - the VA 500 is your reliable partner for the flow measurement of compressed air and gases.
| Burden | < 500 Ω |
| Operating temperature (°C) | -30...110 Sensor tube, -20...85 with pressure sensor -20...+70 Housing |
| Measured variables | m³/h, l/min (1000 mbar, 20 °C) for compressed air or Nm³/h, Nl/min (1013 mbar, 0 °C) for gases |
| Units via keypad on the display | m³/h, m³/min, l/min, l/s, ft/min, cfm, m/s, kg/h, kg/min, g/s, lb/min, lb/h |
| Adjustable via display | Diameter for volume flow calculation, counter resettable |
| Sensor | Thermal mass flow sensor |
| Measuring medium | Air, gases |
| Gas types via CS Service Software or | Air, nitrogen, argon, CO2, oxygen, vacuum |
| Accuracy (v. M. = from measured value) (v. E. |
± 1.5 % of the average ± 0.3 % of the average on request: ± 1 % of the average ± 0.3 % of the average |
| Operating pressure (bar) | -1...50 (For pressure > 10 - order high-pressure fuse separately) |
| Digital output | RS 485 interface (Modbus-RTU), optional: Ethernet interface PoE, M-Bus |
| Pulse output | 1 pulse per m³ or per liter galvanically isolated. Pulse value adjustable on the display. Alternatively, the pulse output can be used as an alarm |
| Supply | 18...36 VDC, 5 W |
| Housing | Polycarbonate (IP 65) |
| Sensor tube | Stainless steel, 1.4301 Installation length 220 mm, Ø 10 mm |
| Mounting thread | G 1/2″, 1/2″ NPT male thread |
| Ø Housing | 65 mm |
| Installation position | any |