The Corning PC-420 Hot Plate Stirreris today’s standard in hotplate stirrers. It comes equipped with ceramic top built for safe operation. The knob controls situated on the front of the instrument allow the users to safely adjust the temperature and speed plate. The LED light brightens to alert the user when the plate is hot and ready to be used. This hotplate stirrer has a built in regulator to monitor and consistently make balancing adjustments to speed and temperature. The Corning PC-420 has all of the features and ruggedness you want in a hotplate stirrer.