Measurement of mass flow rate, output of standard volume flow rate
High accuracy for both small and large flows
Pressure and temperature compensated by the thermal mass flow principle
Easy installation and removal of the sensor, the integrated measuring section can remain in the line for cleaning or recalibration of the sensor and can simply be closed with a sealing cap
No moving parts, therefore low maintenance
Vanishingly low pressure loss due to vanishingly low blockage of the diameter
Can be used for compressed air and non-corrosive gases such as nitrogen, oxygen, argon, helium, etc.
Technical Data VA 520
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
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 relay
Supply
18...36 VDC, 5 W
Burden
< 500 Ω
Housing
Polycarbonate (IP 65)
Measuring section
Stainless steel, 1.4301 or 1.4571
Process connection
R 1/4" to R 2" (BSP British Standard Piping) or 1/2" to 2" NPT thread
Mounting position
any
Flow measuring ranges VA 520 (max version 185 m/s) for compressed air (ISO 1217: 1000 mbar, 20°C)
Connection thread
Outer pipe
Inner pipe
Measuring range full scales
L
L1
H
H1
A
mm
mm
m3/h
(cfm)
mm
mm
mm
mm
mm
R 3/4"
26.9
21.7
175
100
475
275
179.2
165.7
20
R 1"
33.7
27.3
290
170
475*
275
182.6
165.7
25
R 1 1/2"
48.3
41.9
730
430
475*
275
186.9
165.7
25
R 2"
60.3
53.1
1195
700
475*
275
195.9
165.7
30
* Attention: shortened inlet section. Please observe the recommended minimum inlet section (length = 15 x inner diameter) on site!