Patent ID: 7884932

Claim:
Measuring instrument for measuring sample particles moving in a cuvette ( 10 ) to measure a zeta potential or the Brownian particle size of the particle, comprising a filling device ( 20 ) for filling and an emptying device ( 30 ) for emptying the cuvette ( 10 ), which are mounted on the ends thereof and with devices ( 1 , 2 ) for irradiating and for monitoring the particles, the cuvette ( 10 ) member ( 11 ) is mounted by a cuvette bearing ( 40 ) and the filling device and the emptying device ( 20 , 30 ) are fastened exclusively to the cuvette in such a way that a position of the cuvette ( 10 ) relative to the surroundings thereof is determined/defined exclusively by the cuvette bearing ( 40 ).