Adaptable to most modern inverted microscopes, the simple, rugged and compact PLW20 provides three independently controlled and encoded axes for rotational, vertical and horizontal movement. Combine the PLW20 with a Prior ProScan stage for your inverted microscope and you have a system designed specifically for high content screening applications with a capacity of 20 well plates (two racks of 10 each). The two stainless steel racks provided with each loader accommodate covered and uncovered well plates up to 19mm in height. Sensors monitor the presence of well plate racks so that the system can be programmed to respond when racks are changed in the middle of a run. Additionally, the DLL provided with the PLW20 is compatible with both ProScan II and ProScan III stage and focus controllers.