Transparent Flat Glass has precision moulded prismatic grooves cut on inner surface, which comes in contact with liquid. Light striking on glass portion covered by liquid is refracted (absorbed) making this portion appear BLACK, whereas glass portion covering vapour space reflectmore...
GAUGE GLASS THOUGHNED REFLEX PLAIN TYPE & ROUND GLASS as per ISI specification full transparent gauge glass tube for high pressure boiler O.D.L. length required and we offer red/green/blue Milky white glass furnace peeping strip Wilcox Rubber Cone-Ring, MICA strips 0.15 mm thick more...