... 1.12 inch), nine stage, side-on photomultiplier tubes, borosilicate glass, double-alkali photocathode Features: Diameter of ... 5mm(1.12 inch), nine stage, side-on photomultiplier tubes, borosilicate glass,double-alkali photocathode, 170 ~ 350nm spectral ... , colorimeter, dust meter, light meter, radiation calorimeter,scanning electron microscopy, turbidity meter, particle counter, biochemical analyzer, X- ...