| 摘要 |
An apparatus ( 10 ) for analysing material in particulate form is disclosed. The apparatus ( 10 ) comprises a vertically elongate housing ( 12 ) having an open upper end ( 26 ) and a restricted outlet at the lower end. A probe ( 28 ) directs light through a transparent cover ( 22 ), provided in one wall of the housing ( 12 ), and collects light reflected from particulate material in the housing ( 12 ). A slide valve ( 24 ), which includes a U-shaped section ( 30 ) and a T-shaped section ( 34 ) with a hole ( 32 ) therebetween, partially closes the outlet of the housing ( 12 ). Movement of the slide valve ( 24 ) by means of a knob ( 56 ), rod ( 36 ) and coil spring ( 44 ) allows for adjustment of the flow rate of the material through the apparatus ( 10 ), as well as for clearing blockages which may occur at the exit of the apparatus ( 10 ).
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