Sauerbrey or Sauerbrei or Sauerbreij may refer to: Ellen Sauerbrey (born 1937), American politician Frank Sauerbrey, German ski jumper Günter Sauerbrey (1933–2003), German physicist and researcher Katherine Sauerbrey (born 1997), German cross-country skier Nicolien Sauerbreij (born 1979), Dutch snowboarder Rudolf Sauerbrei (1919–2007), German Major, highly decoracted in World War II Ulf Sauerbrey (born 1961), German rower See also Sauerbrey equation, in quartz crystal microbalance invented in 1959 Sauerbrey constant Sauerbrey layer