The Flow Meter for permanent installation


Quantities of measurement

Heat Quantity (Volume Flow, Mass Flow, Flow Velocity)


Any liquid heat transfer medium with up to 10% of gaseous or solid entrainments

Media temperature

-40°C … +130°C (extended up to +200°C)

Pipe diameter range

25 mm … 2.000 mm (no limitations on wall thickness and material)

Flow velocity range

0,01 … 25 m/s

Flow channels

1 or 2

Measurement accuracy

Flow: ±1.6 % of reading, ±0,01 m/s

Measurement accuracy
(field calibrated)

Flow: ±0.5 % of reading, ±0,01 m/s

Measurement accuracy

Temperature: ± 0,01% of reading, ± 0,03 K


Flow: ±0.15% of reading, ±0,01 m/s

Communication Protocol

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

Operating temperature of the transmitter

-40°C … +60°C

Degree of protection

Transmitter: IP65, Transducers: up to IP68

Available Hazardous Area Classification (optional)

ATEX and IECEx Zone 2

Inputs Energy Version

Max. 4, Temperature (Pt100/Pt1000), Current, Voltage, Binary

Outputs Energy Version

(Switchable active/passive) Current, Voltage, Frequency, Binary


  • Reliable and wearfree measurement from outside
  • Virtually unlimited application range – even at extreme applications (from -190 °C uo to +650 °C)
  • Accurate thermal energy measurement due to:
    – highly accurate flow measurement with paired and traceable calibrated ultrasonic transducers
    – highly accurate temperature measurement with paired and traceable calibrated temperature sensors (acc. to DIN EN 1434-1)
  • Extremely high measuring dynamics from the lowest to the highest flow velocities – captures even the slightest flows at night time
  • Simple, cost-effective retrofitting without any disruption to supply

Tamper-proof storage of measuring data