Posted in | Mass Flow Meter

WBI Flow Sensors for HVAC and Analytical Instruments

The WBI sensors from First Sensor comes with I²C bus interface and offer mass flow measurement for gases and air based on an extremely sensitive thermal measuring principle. The WBI series includes unidirectional and bidirectional flow ranges. The digital sensors realize a very high accuracy over the whole measuring range in both positive and negative flow directions and feature low power consumption and rapid response times.

Common applications include HVAC, medical devices, instrumentation, as well as analytical instruments.


  • Flow ranges 0...200 sccm, 0...±200 sccm, 0...1 slpm, 0...±1 slpm
  • Digital I²C bus output
  • Thermal mass flow sensing
  • Quality Management System according to ISO 13485:2003 and ISO 9001:2008
  • RoHS and REACH compliant

Technical Specifications

Flow ranges 0...±200 sccm to 0...±1 slpm
Output signal I²C bus
Repeatability and hysteresis (max.) ±0.25 of reading
Flow connection tube fitting (Ø 5.1 mm)
Size without ports and pins (approx.) 31 x 16 x 32 mm



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