Flow meter for compressed air and gases VA 500
Product information "Flow meter for compressed air and gases VA 500"
Flow meter for compressed air and gases VA 500
The VA 500 flow meter for compressed air is a thermal mass flow meter that uses the principle of thermal dispersion to monitor the flow rate of compressed air in a system. Here's how the VA 500 flow meter works to monitor compressed air:
Items of Flow meter for compressed air and gases VA 500
| Product | Description | Order No. |
| VA 500 consumption probe in the basic version: standard (92.7 m/s), probe length 220 mm, without display | 0695 5001 |
Thermal mass flow sensor for compressed air and gases
Recording and reducing energy costs and CO2 emissions while increasing the sustainability of any compressed air system. With our VA500 it is possible to monitor your consumption and analyze your leakage flows with just one measuring device. Due to its design, it is also ideal for mobile measurements.Technical Data VA 500
| Parameters | m3/h, l/min (1000 mbar, 20 °C) in case of compressed air or Nm3/h, Nl/min (1013 mbar, 0 °C) in case of gases |
| Units adjustable via keys at 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 keypad | Diameter for volume flow calculation, counter resettable |
| Sensor | Thermal mass flow sensor |
| Measured medium | Air, gases |
| Gas types are adjustable over CS service software or CS data logger | Air, nitrogen, argon, helium, CO2, oxygen, vacuum |
| Measuring range | See Measuring range table |
| Accuracy (m.v: of meas. value) (f.s.: of full scale) | ±1.5% of m.v. ± 0.3% of f.s. on request: ±1% of m.v. ± 0.3% of f.s. |
| Operating temperature | -30... 110°C sensor tube -20...+70°C housing |
| Operating pressure | -1...50 bar (for pressure > 10 bar order additional high-pressure protection) |
| Digital output | RS 485 interface, (Modbus-RTU), optional: Ethernet interface PoE, M-Bus |
| Analogue output | 4...20 mA for m3/h or l/min |
| Pluse output | 1 pulse per m3 or per litre electrically isolated. Pluse weight can be set on the display. Alternatively, the pluse output can be used as an alarm |
| Supply | 18...36 VDC, 5 W |
| Burden | < 500 Ω |
| Housing | Polycarbonate (IP 65) |
| Sensor tube | Stainless steel, 1.4301 Installation length 220 mm, Ø 10 mm |
| Mounting thread | G 1/2", G 1/2" NPT male thread |
| Ø housing | 65 mm |
| Mounting position | any |
| Flow measuring ranges VA 500 for compressed air (ISO 1217: 1000 mbar, 20°C) | ||||||||
| Inside diameter of pipe | VA 500 Standard (92.7 m/s) | VA 500 Max. (185.0 m/s) | VA 500 High-Speed (224.0 m/s) | |||||
| Inch | mm | Measuring range full scale | Measuring range full scale | Measruting range full scale | ||||
| m3/h | (cfm) | m3/h | (cfm) | m3/h | (cfm) | |||
| 1/2" | 16.1 | DN 15 | 759 l/min | 26 | 1516 l/min | 53 | 1836 l/min | 64 |
| 3/4" | 21.7 | DN 20 | 89 m3/h | 52 | 177 m3/h | 104 | 215 m3/h | 126 |
| 1" | 27.3 | DN 25 | 148 m3/h | 86 | 294 m3/h | 173 | 356 m3/h | 210 |
| 1 1/4" | 36.0 | DN 32 | 266 m3/h | 156 | 531 m3/h | 312 | 643 m3/h | 378 |
| 1 1/2" | 41.9 | DN 40 | 366 m3/h | 215 | 732 m3/h | 430 | 886 m3/h | 521 |
| 2" | 53.1 | DN 50 | 600 m3/h | 353 | 1197 m3/h | 704 | 1450 m3/h | 853 |
| 2 1/2" | 68.9 | DN 65 | 1028 m3/h | 604 | 2051 m3/h | 1207 | 2484 m3/h | 1461 |
| 3" | 80.9 | DN 80 | 1424 m3/h | 838 | 2842 m3/h | 1672 | 3441 m3/h | 2025 |
| 4" | 110.0 | DN 100 | 2644 m3/h | 1556 | 5278 m3/h | 3106 | 6391 m3/h | 3761 |
| 5" | 133.7 | DN 125 | 3912 m3/h | 2302 | 7808 m3/h | 4594 | 9453 m3/h | 5563 |
| 6" | 159.3 | DN 150 | 5560 m3/h | 3272 | 11096 m3/h | 6530 | 13436 m3/h | 7907 |
| 8" | 200.0 | DN 200 | 8785 m3/h | 5170 | 17533 m3/h | 10318 | 21229 m3/h | 12493 |
| 10" | 250.0 | DN 250 | 13744 m3/h | 8088 | 27428 m3/h | 16141 | 33211 m3/h | 19544 |
| 12" | 300.0 | DN 300 | 19814 m3/h | 11661 | 39544 m3/h | 23271 | 47880 m3/h | 28177 |
- Principle of Operation: The VA 500 flow meter measures the flow rate of compressed air by utilizing two temperature sensors and a heater element within the flow sensor probe. One sensor measures the actual gas temperature, while the other sensor is heated to a constant temperature above the gas temperature.
- Thermal Dispersion: As the compressed air flows past the heated sensor, heat is transferred from the sensor to the gas. The amount of heat transferred is directly proportional to the mass flow rate of the compressed air. The difference in temperature between the two sensors is used to calculate the flow rate of the compressed air.
- Signal Processing: The VA 500 flow meter processes the temperature difference signal and converts it into a digital output representing the actual flow rate of the compressed air in standard units such as cubic feet per minute (CFM) or liters per minute (LPM).
- Monitoring and Display: The VA 500 flow meter provides real-time monitoring of the compressed air flow rate through a digital display or communication interface. Operators can view and track the flow rate data to ensure that the system is operating within specified parameters.
- Features and Benefits: The VA 500 flow meter offers high accuracy, fast response time, and low pressure drop, making it suitable for a wide range of compressed air applications. It can help operators optimize system performance, detect leaks, and improve energy efficiency by providing accurate flow rate measurements. Overall, the VA 500 flow meter for compressed air monitoring is a reliable and effective tool for measuring and monitoring the flow rate of compressed air in industrial applications, helping operators maintain system efficiency and reduce operational costs.
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