Compressed Air Flow Meter


Flow channels

1 or 2

Operating temperature of the transmitter

-20°C … 60°C

Degree of protection Transmitter


Explosion protection

ATEX, IECEx Zone 2 optional


2, Available are: temperature (Pt 100, Pt 1000), current


4, Available are: switchable current, binary

Communication Protocol

Modbus RTU, M-Bus, BACnet MS/TP, RS485

Media temperature

-40°C … +100°C

Pipe diameter range

15 mm … 250 mm

Flow velocity range

0,01 … 35 m/s (dependent on pipe size)

Measurement accuracy

±1% … 3% of reading, ±0,01 m/s, depending on application

±0,5% of reading, ±0,01 m/s, field calibrated


±0,15% of reading, ±0,01 m/s

Additional Notes

Minimum operational pressure: 3 bar on steel pipes, atmospheric pressure and below on plastic pipes


  • Reliable and maintenance-free compressed air flow measurement from the pipe wall outside (starting at 3 bar on steel pipes; atmospheric pressure and below at plastic pipes)
  • Highly accurate due to paired, temperature compensating and traceable calibrated ultrasonic transducers
  • Extremely high measuring dynamics from the lowest to the highest flow velocities
  • Simple, cost-effective retrofitting without any disruption to supply and pipe works
  • No risk of leakage, No pressure losses
  • Bidirectional measurement: simple recognition of the flow direction