Our Ward Counting Wheel provides a simple way to count zooplankton, micro-crustacea, & benthos.  Like our Bogorov chambers, the acrylic construction is designed for use under a binocular dissection microscopes (low power stereoscope), this provides an accurate, simple way to count samples, as referenced in Standard Methods.

• 4.5" Diameter
• Clear acrylic
• ~13ml chamber

Note: Our Ward Counting Wheel is priced to be replacable.  Other models on the market include a base plate. In our experience, the base only adds extra height and often cannot be used under most microscopes.  We decided to forgo the base and offer the wheel at a more reasonable price - - after all, acrylic is great for sizable applications, but must be replaced more often, now at less cost!