Digital mass flow sensors with very high accuracy in both flow directions

March 21, 2013 // By Julien Happich
First Sensor presents the new cost-effective Sensortechnics WBI mass flow sensors with ranges of 200 sccm (standard cubic centimeter per minute) and 1 slpm (standard liters per minute).

In addition to unidirectional devices the WBI series offers bidirectional sensors to measure flows in both directions. The digital flow sensors achieve a very high accuracy over the complete measuring range in the positive as well as negative flow direction. A linear output signal is available via a digital I²C bus interface (analogue output on request). The WBI mass flow sensors utilise a very sensitive thermal measuring principle to detect even lowest air and gas flows. The sensors feature a 2.7 to 5.5V supply and low power consumption to allow for battery powered portable or handheld applications. The small housings enable space-saving and flexible PCB-mounting and compact OEM device constructions.

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