Product 41317 is the most versatile air velocity meter in the market, It has combined GrayWolf's advanced hotwire air velocity sensor technology with the powerful capability of mobile computers.Though it primarily measures air velocity and temperature by calculating basic Volume Flow Rate in real-time, options for differential pressure, pitot tube airspeed, %RH and more are also available.It is extremely easy to use with optional software modules like WolfSense PC software for thermal comfort applications (measuring "drafts"), clean room apps (HEPA filters), Equal Area and Log-Tchebycheff volumetric flow calculation, or for fumehood face velocity measurement.It has wide range for calculating duct air flow and diffuser volumetric flow measurement.