Device for measuring gas flow speeds and directions comprises an optical sensor and a receiver arranged in a measuring chamber surrounded by a perforated wall which forms a detector connected to an evaluating unit

摘要

Device comprises an optical sensor (18) and a receiver (20) arranged in a measuring chamber (16) surrounded by a perforated wall (24) which forms a detector connected to an evaluating unit (22). The detector measures the flow speed and direction of a through flow. Preferred Features: The perforated wall is made of a foil having a thickness of less than 100, especially less than 50 microns .