LFS-15SU Ultrasonic High-Precision Flow Measurement for Bioprocessing

Flow Range 0 – 50 l/min
Accuracy ±1% of reading
TC fitting size (ID) 1″
Wet material Biocompatible PP
Fluid temp 10–60°C / 50–140°F

The LEVIFLOW® LFS-15SU is designed for non-invasive, high precision flow measurements in bioprocessing. Two piezoelectric transducers generate and receive ultrasonic waves. When flow is present, the with-stream wave is accelerated, and the against-stream wave is slowed down. The difference in transit time is proportional to the velocity of the fluid. All wet materials are fabricated from biocompatible (FDA, USP-VI, and BSE/TSE free) gamma robust polypropylene (PP). For accurate measurement down to the lowest flows, the special calibrated version LFS-15SU-SC1 is available.

System Benefits

High accuracy and repeatability of reading
LFS-15SU
10.6 – 50 lpm: ±1 % acc. and <0.5 % rep.
0 – 10.6 lpm: ±0.106 lpm acc. and < 0.053 lpm  rep.
LFS-15SU-SC1
2 – 50 lpm: ±1 % acc. and <0.5 % rep.
0 – 2 lpm: ±0.020 lpm acc. and < 0.010 lpm  rep.

High Precision Flow Measurement

Accurate measurement up to 5 bar
The sensor is made of PP and therefore ideal for high-pressure applications such as TFF or Chromatography.

Pressure Robust

Low shear and no particle generation
The measurement method is completely non-invasive and therefore ideal for delicate fluids.

Non-Invasive Measurement

Suitable for high volume applications
For high volume applications, multi-channel converters are available, which can process up to 6 sensors with one single converter. The sensor signals are available over an RS485 two-wire bus or a PLC interface, thereby reducing cabling, footprint, and cost.

6-Channel Converter for Multiple Sensors

Special calibrated sensor SC1
The special calibrated version LFS-06SU-SC1 with additional calibration points at low flow values, allows accurate flow measurement over a broader range.

Very Wide Flow Range

FDA, USP-VI and BSE/TSE free and Gamma Robust
All wet materials are fabricated from biocompatible (FDA, USP-VI and BSE/TSE free) gamma stable (up to 40 kGy) polypropylene (PP).

Biocompatible Wet Material

Smart digital signal processing
The flow converter uses a digital signal processor (DSP) to provide accurate flow measurement even when bubbles are present.

Improved Robustness against Bubbles

Smart sensor
Various parameters such as full scale, total volume, bubble detection, or high flow alarm are provided and can be configured with the Levitronix® Service Software.

Configurable Flow Sensor Parameters

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