TURBIDIMETRE Russian patent published in 2011 - IPC G01N21/85 

FIELD: physics.

SUBSTANCE: turbidimetre has a cup with a perforated lateral surface, a hollow cylinder, a radiation source, a cover with holes and a radiation receiver. On the lateral wall of the cup opposite each perforation there is light-absorbing cap having a perforated lateral wall, and inside the cup there is a ⊥-shaped hollow rotor placed coaxially with possibility of rotation, in which are mounted a direct illumination light-emitting diode and a diode, light from whose output of which is partially scattered and partially absorbed in the light-absorbing cap, each of which has entrance and exit windows. The entrance windows of the light-emitting diodes lie opposite the radiation source, the exit window of the light-emitting diode, light from whose output of which is partially scattered and partially absorbed in the light-absorbing cap, lies opposite the perforation in the cup closed by the perforated cap, and the exit window of the direct illumination light-emitting diode lies opposite the radiation receiver. The light-emitting diodes can be made from metal or polymer material and have total reflection mirrors. The material of the light-emitting diodes can be optical fibre.

EFFECT: high measurement accuracy by taking into account the background component of the optical radiation used.

3 cl, 2 dwg, 1 tbl