Function and construction
- Product, level or flow sight glasses
- Rotor or indicator flap variants, depending on the model
- Circular or longitudinal MAXOS glass
Configurator
The images are for illustrative purposes and may differ from the final product.
ACI sight glasses provide visual inspection of products, levels and flow in vessels and pipework. Selection covers complete sight glass assemblies and thermally tempered MAXOS borosilicate safety glass in circular and longitudinal formats.

The assembly includes the body, mounting components and seals. MAXOS glass is the observation element: circular to DIN 7080 or longitudinal to DIN 7081. Longitudinal glass is available in transparent and reflex versions. Replacement requires identification of the format, dimensions and reference.
The rotor improves visual detection of liquid flow, particularly with transparent products or low turbulence. In its Type 550 documentation, ACI specifies liquid service for the rotor and sufficient flow velocity to set it in motion.
Manufacturer technical documentation: ACI — Type 550 · MAXOS — DIN 7080 · MAXOS — DIN 7081