Flow Sensor That Expands The Possibilities Of Thermal Flow Measurement In Laboratory Analytics

SLF3S-4000B high-flow sensor enables accurate measurement of flow rates up to 1 l/min

SLF3S-4000B is a liquid flow sensor by the Swiss manufacturer Sensirion. The flow sensor can accurately measures flow rates up to 1 l/min with the usual quality, while measuring just 5 cm in length and weighing 7 g. The accurate flow measurement sensor will enable researchers to measure measure high flow rates while negating the effect of turbulence caused due to higher flow velocities or larger channel cross-sections, thus enabling the sensor to be placed along the narrower side stream (with laminar flow), therefore providing high measurement accuracy.

The company claims that to accurately measure high flow rates, either higher flow velocities or larger channel cross-sections are required; both factors, however, increase the likelihood of turbulence. To overcome this hydrodynamic limitation, Sensirion’s engineers employed a design trick when developing the new high-flow sensor: they laid out the new channel profile in a W-shape.

“By expanding our product portfolio, we are pursuing a one-stop-shop concept for liquid flow measurement. With the SLF3x family, we now cover the measurement range from microliters to 1 liter per minute in the same look and feel,” explains Patrick Reith, Product Manager for Liquid Flow.