Viewing glass

An eye for the essentials

With inspection glasses and two-sided Guth sight glasses you see what is going on. The sight glasses are suitable for both tank bottoms and vessel walls.

The corresponding measuring and control systems provide additional information. Our long-lasting LED sight glass illumination provides additional visibility of the process medium. The LED technology has a substantially longer service life than conventional halogen lamps. Moreover, they have an extremely low power consumption. A further advantage is that they do not produce any heat.

A burning on of the medium onto the viewing glass, as it partially occurs with halogen lamps, is thus excluded. The LED lights are available as a separate unit for screwing to the sight glass screw, or in an in-line design.

• Affordable visual control

• 2 device connections with grooved nut screw connection

• Viewing glass illumination halogen or LED

Technical data


DN 25–150


in product contact not in product contact

1.4301 / AISI 304 1.4301 / AISI 304 1.4404 / AISI 316L




+95°C medium dependent +130°C (Steam sterilisation) cyclically


RA 0.8 µm RA 1.5 - 2.5 µm e-polished


Welding end DIN EN 10357