Secchi Disk Water Quality Testing

Constructed from ABS plastic, this economy secchi disk is perfect for introducing students to this useful water clarity measuring device. To use, simply lower the disc into water until it “disappears” and record the depth to measure clarity. While the student version does not include all the features of the professional model, it does give accurate readings in shallow waters where the currents are not too strong, such as those found in most ponds and small lakes. (This model differs from the professional model in three ways: the line is thinner, the line attachment point is smaller, and the winding spindle is made of floating foam.)