The KROHNE Altosonic III is a cost effective ultrasonic flow meter for custody transfer of light oil products. The 3-beam Altosonic III is the outcome of revolutionary development of liquid multiple-beam ultrasonic flowmeters. It combines innovative technology with long-term experience to guarantee superior performance at an attractive price. The Altosonic III combines excellent repeatability and reliable flow measurement with long-term stability. In addition, this bi-directional flow meter is light, compact, and robust.
Each Altosonic III flowmeter includes the appropriate signal converter and is calibrated by means of wet calibration to guarantee the highest possible accuracy and quality.
Like all KROHNE ultrasonic flowmeters, the Altosonic III operates by the transit-time differential method. The measurement principle is based on a simple physical principle. Imagine two canoes crossing a river diagonally, one with the flow and one against the flow. Naturally the canoe that is travelling with the flow will reach the opposite side sooner than the canoe that is travelling upstream.
Acoustic signals behave in a comparable way. By means of ultrasonic transducers, the transit-time of acoustic signals that travel upstream and downstream are measured. The difference in transit-time is proportional to the mean liquid flow velocity and is transformed into an output signal and display of volumetric liquid flow rates.
The three measuring beams of the ALTOSONIC III make a 3-dimensional cross-section of the velocity distribution, or flow profile of the medium that flows through the flow sensor. These measuring beams are positioned such that the influence of the flow profile is strongly reduced.
This product can be used in the following applications:
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