ExactSonic P - Ultrasonic flow measurement ExactSonic P for test bench applications

Measuring tube diameters 50, 80, 100, 150, 200, 250 and 300 mm (other diameters on request). With temperature and pressure, the transducer calculates the standard volume or mass flow rate from the operating volume flow rate. The transducer is integrated in the connector housing and has a touch display, via which the measured values can be displayed directly and the device can be parameterized. In parallel, both can be remote controlled via the AK protocol from the control room/computer.

Tube design with cone/intermediate flanges, tube connection by clamping rings or clamping chains.

For large pipe diameters usually with process connection via flanges acc. DIN EN 1092-1, form B1 and with additional eyelets for crane transport. Connection option of plain pipe ends is also available.

All versions are additionally equipped with feet that allow safe parking on a flat surface. A storage and transport case is also available on request.

The principle of measurement is also called ultrasonic transit time difference method. Ultrasonic pulses are sent alternately through the medium in and against the direction of flow with this measuring principle for flow measurement of gases. The sensors operate alternately as transmitters and receivers during use. The transit time of the sound signals passing through the medium in the flow direction, is shorter than the transit time of the signals against the flow direction. The transit time difference Δt is calculated on the path traversed by the sound and allows the mean flow velocity of gases to be determined. A special modulation method makes the transit-time measurement less sensitive to interference and more precise/accurate. Based on the measured flow velocity and the pipe cross-section, the integrated transducer can determine the operating volume flow and convert it to a standard volume or mass flow with the integrated pressure and temperature measurement.

The special feature of ExactSonic P is the high temporal resolution of the measurement of 1 kHz, which can map dynamic flow changes, such as those caused by the opening and closing of valves. This includes the fact that the flow is captured bidirectionally and no buffer volume is required. In addition to the temporal resolution, this is also the difference to ExacFlow II.

Further advantages of ultrasonic flow measurement are the low pressure loss and the realization of large measuring tube cross sections.

The ExactSonic P is suitable for clean, single-phase, neutral and non-flammable gases up to a pressure of approx. 0.4 MPa. For higher pressures and corrosive gases, the ExactFlow II is available as an alternative.

Output signals:
Analog output 4 - 20 mA and 0-10 V, updating and averaging adjustable
LAN, Ethernet RJ45, AK protocol
USB interface for log files and administration

Measuring range

±1 … ±6360 m³/h
±1,2 … ±7630 kg/h

Measurement accuracy / Repeatability

<1% of actual value; <±0.5% of actual value
ISO17025 calibration

Pressure resistance

4 bar g / 0.4 MPa

Media temperature

-20 … +60 °C

Displayed indicators

Temperature, pressure, operating volume, standard volume or mass flow + option rh (gas humidity)

IP protection type


Sensor output

Analog output 4 - 20 mA and 0-10 V, updating and averaging adjustable
LAN, Ethernet RJ45, AK protocol
USB interface for log files and administration