Volume flow measurement

AirFlow P

Measurement of the volume flow, especially in dusty applications. Easy installation on existing ducts, no Venturi or similar conversions are required. Can be used in environments with low dust loads or in harsh conditions with e. g. high dust loads.

AirFlow P is the perfect measuring device for volumetric flow measurement at positions where differential pressure measurements can not be used due to excessive dust loading or where duct conversions are not possible or desirable.

Volume flow measurement especially in dusty applications
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  • Reliable measured values even in dusty applications
  • Easy to retrofit
  • No calibration necessary
  • Output in operating cubic metres
  • Suitable for all diameters and geometries
  • No venturi (constriction) needed
  • Cement
  • Chemistry
  • Energy

Application examples:

Via two antennas that protrude into the air duct, the AirFlow P is able to perform a very accurate speed measurement.

If the area of the duct is stored on the evaluation unit, the AirFlow P system supplies a signal at the analogue output cubic metres per hour (v x A).

By using the latest technologies, it is possible to measure a volume flow with the AirFlow P in clean gas ducts with a dust loading of only a few mg/m³.

It is also possible to use the AirFlow P as a pure speed measuring device, e. g. in order to keep the actual material velocity constant.

Technical Specifications
Material to measure Dust
Working principle Electrodynamic
Process temperature -20 … +250 °C
Mounting Weld on socket, TriClamp
Type of Conveying Air transport
Flow rates Up to 20 g/m³
Pipe diameter Independend
ATEX rating Non
Output Relais, analog output
Technical Data
Sensor
Power supply 24 V DC, fed by evaluation unit
Measuring range from 1 mg/m³
Speed range 1 m/s … 100 m/s
Process temperature -20 … +250 °C
Ambient temperature -20 … +60 °C
Housing material Aluminium
Sensor rod material Stainless steel
Protection type IP65
Dimensions 220 x 840 x 120 mm (W x H x D)
Weight 5.5 kg
Evaluation unit (DIN Rail)
Power supply 24 V DC ± 10 %
Power consumption 20 W / 24 VA
Protection type IP40 to EN 60 529
Ambient operating temperature -10 … +45 °C
Dimensions 23 x 90 x 118 mm (W x H x D)
Weight Approx. 172 g
DIN rail fastening DIN 60715 TH35
Connection terminals cable cross-section 0.2 – 2.5 mm² [AWG 24-14]
Current output 1 x 4 … 20 mA (0 … 20 mA),
load < 500 Ω (Active)
Interface Modbus RTU (RS 485) / USB
Pulse output Open Collector – max. 30 V, 20 mA
Relay contact Max. rated load: 250 V AC
Max. peak current: 6 A
Max. rated load 230 V AC: 250 VA
Max. breaking capacity DC1:
3/110/220 V: 3/0.35/0.2 A
Min. switching load:
500 mW (10 V / 5 mA)
Data backup Flash Memory
Evaluation unit (field housing)
Power supply 110 / 230 V AC 50 Hz (optional 24 V DC)
Power consumption 20 W / 24 VA
Protection type IP65 to EN 60 52910.91
Ambient operating temperature -10 … +45 °C
Dimensions 258 x 237 x 174 mm (W x H x D)
Weight Approx. 2.5 kg
Interface RS 485 (Modbus RTU) / USB
Cable screw connectors 3 x M20 (4.5 – 13 mm Ø)
Connection terminals cable cross-section 0.2 – 2.5 mm² [AWG 24-14]
Current output 3 x 4 … 20 mA (0 … 20 mA),
load < 500 Ω (Active)
Pulse output Open Collector – max. 30 V, 20 mA
Relay contact Max. rated load: 250 V AC
Max. peak current: 6 A
Max. rated load 230 V AC: 250 VA
Max. breaking capacity DC1:
3/110/220 V: 3/0.35/0.2 A
Min. switching load:
500 mW (10 V / 5 mA)
Data backup Flash Memory

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