SIGMA's Sight Flow Indicator (Flow Glass) are designed to facilitate instant visual indication of liquids flowing through pipes even from a distance. Visual inspection and proper control of vital areas are important in processes for proper operation of well-designed plants.

These are available in various types such as Flapper, Drip Lip, Full View, Elbow etc. with Double or Single windows in Flanged or Screwed and other end connection. For ease of installation, Flanged Type for sizes 3" and above are preferred.