News Topic

Thermal Mass Compressed Air and Gas Flow Meters VA500

Flow sensor for compressed air and gas – VA 500

Contrary to the previously used bridge circuit the newly developed evaluation electronics of our flow sensor records all measured values digitally. This leads to a better accuracy also in case of large measuring spans of 1:1000.

What are the advantages of our flow measuring technology?

  • Even under pressure, the flow sensor VA 500 is mounted by means of a standard 1/2“ ball valve. During mounting and dismounting the safety ring avoids an uncontrolled ejection of the probe which may be caused by the operating pressure. For the mounting into different pipe diameters VA 500 is available in the following probe lengths: 120, 160, 220, 300,  400 mm. So the flow sensors a being mounted into existing pipelines with inner diameters  of 1/2“ upwards. The exact positioning of the sensor in the middle of the pipe is granted by means of  the engraved depth scale. The maximum mounting depth corresponds with the resprective probe length. Example: VA 500 with probe length 220 mm has a maximum mounting depth of 220 mm.
  • If there is no suitable measuring site with a 1/2“ ball valve present there are two simple possibilities to set up a measuring point :
    •  Weld on a 1/2“ screw neck and screw on a 1/2“ ball valve
    • Mount spot drilling collar incl. ball valve (see accessories)
    • By means of the drilling jig it is possible to drill under pressure through the 1/2“ ball valve into the existing pipeline. The drilling chips are collected in a filter. Then the probe can be mounted as described  under point A.
  • Due to the large measuring range of the probe even extreme requirements to the consumption measurement (high volume flow in small pipe diameters ) be met. The measuring range is depending on the pipe diameter

Special features of flow sensor VA 500:

  • RS 485 interface, Modbus-RTU as a standard
  • Option integrated display for m³/h and m³
  • Usable from 1/2“ to 12“ (DN 300)
  • Easy installation under pressure
  • 4…20 mA analogue output for m³/h resp. m³/min
  • Pulse output for m³
  • Inner diameter adjustable via keypad
  • Consumption counter resettable
  • Adjustable values at the display of the flow sensor: Reference conditions, °C and mbar, 4…20 mA scaling, pulse weight

Technical data VA 500

  • Parameters  : m³/h, l/min (1000 mbar, 20°C) in case of compressed air resp. 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
  • Adjustable via keypad : Diameter for volume flow calculation, counter resettable
  • Meas. principle: :  calorimetric  measurement
  • Sensor: Thermal mass flow sensor
  • Meas. medium : air, gases
  • Sas types adjustablevia external devicesDS 400, DS 500, PI 500 : air, nitrogen, argon, nitrous oxide, CO2, oxygen
  • Meas. range: see table measuring ranges page 80
  • Accuracy :
    • ± 1.5 % of m.v. ± 0.3 % of f.s.on request
    • ± 1.0 % of m.v. ± 0.3 % of f.s.
  • Operating temp.: -30…110 °C probe tube -30…80 °C housing
  • Operating pressure: up to 50 bar
  • Digital output:  RS 458 interface, Modbus RTU, M-Bus (optionally)
  • Analogue output :  4…20 mA for m³/h resp. l/min; on request : scaling for cfm,m³/min, l/min, l/s, ft/min, m/s
  • Pulse out-put: 1 pulse per m³ resp. per liter  galvanically separated
  • Power supply: 18…36 VDC, 5 W
  • Housing : polycarbonate (IP 65)
  • Probe tube: stainless steel, 1.4301 mounting length 220 mm, Ø 10 mm
  • Mounting thread : G 1/2“



Articles: Flow meters Wiratama

Promag L 400 EH Electromagnetic Flow Meter

The versatile, weight-optimized Promag L is the preferred choice for all standard applications in the water and wastewater industry. Due to its unique lap-joint flange concept, the flowmeter guarantees flexible, easy and economical installation. Promag L 400 saves time and costs thanks to the broad functionality of its water- and wastewater-optimized transmitter. In addition, Heartbeat […]

SITRANS FUS060 Siemens Ultrasonic Flow Meter

The SITRANS FUS060 transmitter is engineered for high performance applications and designed for remote installation in hazardous as well as non-hazardous environments. In addition to the standard outputs, it also offers communication. The SITRANS F US SONO 3100/SITRANS FUS060 flowmeter consists of a sensor and transmitter. For details and information about the transmitter, see SITRANS FUS060 […]

Flow meter air dingin chiller

Sistem pendingin yang banyak di gunakan untuk gedung dengan kapasitas besar seperti hotel, mall serta cold storage biasanya menggunakan chiler sebagai pilihan utama. Untuk bisa memantau performa dari chiller biasanya mengacu pada kapasitas energi yang dihasilkan oleh chille. Karena itu perlu diketahui berapa besar flow rate dengan flow meter air dingin yang  dikalkulasikan dengan besaran […]

Flow meter sistem / pompa pemadam Kebakaran

Flow meter pompa pemadam merupakan flow meter yang digunakan untuk : Mengetes kapasitas sistem pemadam kebakaran Memantau kapasitas pompa sistem pemadam kebakaran Mengetahui performa dari sistem pompa pemadam kebakaran. Flow meter yang digunakan untuk sitem pemadam kebakaran ini menggunakan sitem kerja dari jenis venturi flow meter dengan penunjukan kapasitas berupa dial gauge. Fire pump flow […]

Flow meter ultrasonic 2 Path

Flow meter ultrasonic 2 path atau Double path merupakan jenis flow meter ultrasonic clamp on yang bisa di operasikan atau di instalasi di 2 pipa dengan ukuran dimeter pipa  yang sama maupun ukuran dimeter pipa yang berbeda. Jadi jika kita ingin mengetahui atau mengecek aliran suatu cairan dalam pipa dengan ukuran pipa berbeda ataupun sama […]


Ada yang ingin ditanyakan silahkan :

1. Jika ada Pertanyaan tentang Product ataupun harga silahkan langsung hubungi :


2.  Jika ada pertanyaan atau diskusi Tentang tulisan ini silahkan email ke


Atau silahkan isi kolom dibawah ini dan klik submit  



Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s

%d bloggers like this: