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The ruler incorporates 90° positive-stop locking joints for accurate alignment and dependable measuring
Durable ceramic pressure sensor
-Two pockets at front with flaps
Seafood processing
Fieldmaster (Educational Use) Secchi Disk, 20 cm Diameter with 20m Line Clothing The ruler incorporates 90° positive-stopProduct 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
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