This disc is used to check water transparency in oceans and lakes. The disc rests on a pole and is lowered into the water; the depth at which the pattern on the disc is no longer visible is taken as a measure of water transparency. This measurement, known as the Secchi depth, is related to water turbidity.

We are manufacturers and suppliers of the Secchi Disc, serving Algeria, Argentina, Australia, Bahrain, Bangladesh, Belgium, Bhutan, Brazil, Cambodia, Cuba, Cyprus, Denmark, Ecuador, Egypt, Ethiopia, Finland, France, Georgia, Germany, Ghana, Hungary, Iceland, Italy, Japan, Jordan, Kenya, Kuwait, Malaysia, the Philippines, Tanzania and Uganda.