Our sturdy plastic Secchi disk handily meets industry standards. It is 200 mm in diameter (7-7/8”) and has four quadrants, two white and two black. We include 20 meters of 1/8” diameter line on a styrofoam form that will float if dropped in the water. Line is unclaibrated. Plus instructions that are written at a basic level.
D**.
Turbidity Measuring tool
This was an excellent tool for the marine biology class that I was teaching. It definitely helped them understand how marine biologists measure the visibility of the water
TrustPilot
1 周前
1 个月前
