Scientific Instruments and Research Equipment Design Guardian 7000 Hotplate Stirrer by Michael Manera Think safer, think Smart! Modernize your lab with the Guardian 7000 Series Hotplate Stirrers featuring Ohaus Smart technology; SmartPresence, SmartLink, SmartRate, SmartHeat, SafetyHeat, and SmartHousing. The Guardian Series protects the lab with these integrated safety features to reduce the chance of accidents. Designed with superior heating and stirring performance, the Guardian 7000 Series combine durability and affordability to reduce the costs of doing business in science labs. Count on Guardian 7000 Hotplate Stirrers for outstanding safety and performance.