Patent ID: 11898953
Assignee: SENSIRION AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. The particulate matter sensor device according to claim 1,
wherein the constriction extends over a constriction region and defines a constriction maximum,
wherein a distance L0 between said constriction maximum and a position of a maximum opening angle Θmax complies with the formula:, L
    0
  
  =
  
    
      Θ
      max
    
    β
  

or wherein a constricted clear minimum width D1 at the constriction maximum complies with the formula:, D
    1
  
  ≤
  
    
      D
      0
    
    +
    
      
        2
        β
      
      ⁢
      
        log
        (
        
          cos
          ⁡
          
            (
            
              β
              *
              
                L
                0
              
            
            )
          
        
      
    
  

D0 designating an average flow channel diameter,
or wherein a distance L1 between said constriction maximum and a position of a stall angle SA is chosen according to the formula:, L
    1
  
  =
  
    
      S
      ⁢
      A
    
    β
  

β designating an opening angle change per millimeter of said constriction.