Levitronix® has released the first ultrasonic, single-use (SU) flowmeter on the market. Characterized by high accuracy and superior performance, LEVIFLOW® SU noninvasive flowmeters enable a highly precise and low-cost flow measurement. With an accuracy of <1% of reading and flow ranges from 1 mL/min to 80 L/min, they offer the highest level of accuracy for measuring liquids in biopharmaceutical and other applications that require FDA, USP-VI, BSE/TSE, and animal-component–free materials that can be gamma sterilized.
Technical Background: Figure 1 illustrates the operating principle: Two piezo-electric transducers, mounted in the sensor housing, generate and receive an ultrasonic wave. The wave going in direction of the flow (with-steam wave) is accelerated, and the wave going against the flow direction (against-steam wave) is slowed down. Both waves are processed by a signal converter. The difference of the transit time of both waves is proportional to the velocity of the fluid.