Fieldmaster (Educational Use) Secchi Disk, 20 cm Diameter with 20m Line Clothing and aren't fazed by a

and aren't fazed by a little time off it

Product Code: 77222

The ruler incorporates 90° positive-stop locking joints for accurate alignment and dependable measuring

Designed for maximum throwing performance and rapid reloading

Product Code: HI98331

Fieldmaster (Educational Use) Secchi Disk, 20 cm Diameter with 20m Line Clothing and aren't fazed by aProduct Code: 623 2010 The 623 2010 Fieldmaster Secchi Disk Kit is an economical, student friendly limnological Secchi disk designed to measure water transparency, turbidity and light penetration in lakes, ponds, reservoirs and slow moving rivers. Built to the accepted industry standard, the 200 mm (7 7 8 in.) diameter disk features four quadrantstwo black and two whiteto provide consistent, repeatable water clarity measurements that can be compared