• Compressed air balancing, compressed air consumption measurement
• Leakage air / leak rate determination
• Mobile compressed air measurement in front of single machines / plants
• Flow measurement of process gases like e. g. nitrogen, CO2, oxygen, argon, nitrous oxide
• Flow measurement at nitrogen generators

Intelligent solutions for accurate consumption measurement for compressed air and gases  The new affordable consumption counters  VA 520 work according to the approved  calorimetric measuring principle.  In this process a heated sensor is cooled down by the gas circulating around it. The flow dependent  cooling-down is used as a measuring effect while the degree of  cooling-down is directly depending on the passing air resp. gas mass. Therefore, an additional pressure and temperature compensation is not necessary. Due to its compact design it is possible to monitor all compressed air systems from the compressor to the smallest compressed air tool (1/4” to 2 inch) with the new affordable consumption counter VA 520. VA 500 consumption sensors are available for larger pipe diameters from DN 50 to DN 300. Due to the new evaluation electronics all VA 520 have an integrated Modbus output as a standard. So all parameters can be transferred via Modbus Apart from compressed air also other gases like e. g. nitrogen, oxygen and CO2 can be measured. The installation of the compressed air counters VA 520 can be done easily and quickly. A special advantage is the removable measuring device. The measuring device can be demounted quickly and easily for calibration or cleaning purposes without removing the complete measuring section.

TECHNICAL DATA

VA 520 Parameters: m3/hr, l/min (1000 mBar, 20° C)  for compressed air - or  Nm3/h, Nl/min (1013 mBar, 0° C) for other gases
Adjustable via keypad:  m3/h, m3/min, l/min, l/s,  ft/min, cfm, m/s, kg/h, kg/min.
Meas. principle: calorimetric measurement.
Meas. medium: air, gases.
Gas selectable via software : air, nitrogen (standard), NO2 CO2,oxygen, argon (optional)
Accuracy: ±1.5% of m.v., ±0.3% of f.s.
Operating temp.: from -30 to 80°C.
Operating press.: up to 16 bar. Optional up to PN 40 (pls require special quotation).
Analogue output: 4...20 mA for m3/h resp. l/min
Digital output: RS 485 interface, Modbus RTU
Pulse output: 1 pulse per m3 resp.  galvanically separated
Power supply: 24 VDC smoothed ± 15 %
Housing: polycarbonate
Meas. section: stainless steel, 1.4301
Mounting thread meas section:  R 1/4”, R 1/2”, R 3/4”, R 1”, R 1 1/4”, R 1 -1/2”, R 2”, external thread.