... tubes, borosilicate glass, double-alkali photocathode Diameter of 28.5mm(1.12 inch), nine stage, side-on photomultiplier tubes ... , borosilicate glass, double-alkali photocathode Features: Diameter of 28.5mm(1.12 inch), nine stage, side-on photomultiplier tubes ... electron microscopy, turbidity meter, particle counter, biochemical analyzer, X-ray camera timer, optical density meter, optical properties to ...