Coulter Counter ZM

This is a used Coulter Counter Model ZM, a classic electronic particle counter built on the original Coulter principle of impedance based counting and sizing. It was designed to count and size particles suspended in fluid, including blood cells, by drawing the sample through a small aperture and measuring the electrical impedance changes caused by each particle. This unit is offered in used condition for laboratories and researchers who need a straightforward, single parameter counting instrument. The Model ZM is valued for its simplicity and reliability, offering direct particle counts and size distribution data without the added complexity of multi parameter analyzers. It has long been used not only in clinical hematology but also in research applications such as cell culture monitoring, industrial particle analysis, and general biological research where accurate particle counting is required. Its rugged analog design has helped many units remain functional for decades with basic maintenance. Laboratories, research institutions, and specialty applications that need a dedicated particle counter rather than a full CBC analyzer will find this Coulter Counter ZM a practical and cost effective choice. It is particularly well suited to teaching labs, legacy research protocols, and any setting where the proven Coulter counting method is specifically required or preferred over newer optical technologies.