is intended to provide a platform with which to load and thermally seal biological plates to prevent sample loss at high temperature or prolonged periods of storage. Various types of plate may be loaded onto a plate carrier and covered by a thermal sealing medium, which may be foil or clear plastic. The operator may pre-set a precise temperature and seal time for the sealing operation. Sealing is initiated by pulling down a handle which raises the sample plate into contact with the hot plate. The plate sealer detects when the sample plate is in the correct position and starts a countdown timer. The countdown is displayed on a three digit LED display. When the display reads zero, the operator lifts the handle back to the upright position, which moves the sample plate away from the hot plate. The plate may then be manually removed for further processing