Guardian 3000 Hotplates and StirrersOVERVIEW OHAUS Guardian 3000 Hotplate Stirrers are designed for economical heating and stirring in all laboratory settings. The bright LCD display includes easy to read temperature and speed settings, intuitive icons and a prominent hot top indicator that lights up when the heater is above 40C. Select from three plate sizes to suit your application. All models can be used with the optional temperature probe for precise temperature control of the