| 摘要 |
<p>A sanitary sight indicator (10) for viewing the contents of a production process is provided. The sanitary sight indicator includes a body (14), an optical unit (16), and a sanitary connection (18) between the body (14) and the optical unit (16). The body (14) includes a process-interfacing portion (32) which is adapted to interface with the production process and an optical-interfacing portion (30) which interfaces with the optical unit (16). The optical unit (16) includes a viewing portion (50) for viewing the contents of the production process and a body-interfacing portion (56) which interfaces with the optical-interfacing portion (30) of the body (14). The sanitary connection (18) includes a sanitary gasket (20) having a substantially flat annular portion (62), and first and second annular projections (64, 66) which are approximately semi-circular in cross-sectional shape and which extend outwardly from opposite sides of the annular portion (62). The sanitary connection (18) further includes a sanitary-gasket groove (70, 72) in each of the optical unit-interfacing portion (30) and the body-interfacing portion (56). Each of the sanitary-gasket grooves (70, 72) includes a flat surface (74) supporting one of the annular porjections (62) of the sanitary gasket and a channel (76) supporting one of the annular projections (62) of the sanitary gasket (18). Such a sight indicator (10) may be in the form of a 'sight flow indicator' for installation in a process line or a 'sight window' for installation on a process tank.</p> |
