Device for detecting the presence of pollen in the air, and corresponding detection method

A device for detecting a presence of pollen in air, comprising:

• a measuring chamber isolated from external light,
• means for driving an air flow through said measuring chamber,
• a light source emitting a light beam in a direction of propagation through said air flow, into said measuring chamber,
• at least four photosensitive sensors configured to measure a luminous flux diffused by said illuminated air flow, including:
• a first sensor measuring said luminous flux diffused in a direction forming an angle of between 5° and 25° with said direction of propagation;
• a last sensor measuring said luminous flux diffused in a direction forming an angle of between 150° and 175° with said direction of propagation;
• at least two sensors each measuring said luminous flux diffused in a direction forming an angle of between 25° and 150° with said direction of propagation;
• a clock,
• at least two meteorological sensors, and
• at least one computer configured to determine a nature of a pollen particle present in the air from data measured by said photosensitive sensors, said clock and said meteorological sensors.