Palmer Cell Ceramic (NR)

This is a NON-RETURNABLE ITEM. See Terms & Conditions for more info. You will be required to approve Terms & Conditions at checkout. Approval acknowledges your acceptance of this item being non-returnable. Similar to the Sedgewick Rafter but specifically intended for nannoplankton. The shallow depth of the circular chamber permits use of 40 to 45 x objectives. Because its magnification limit is 400 to 450 x, it is recommended for 43 x dry objectives of approximately 0.65 n.a. and 4 mm e.f. Do not use unless your sample contains a dense population of 10 or more plankters per field, due to the cell’s small size. Such a small sample portion from a less dense population can cause serious underestimation of density. Specifications: • Volume is 0.1 mL for all types • Ceramic cell is shallow, 17.9 mm diameter x 0.4 mm deep, with 2 charging channels. Has greater volume variances than stainless steel.