Cold and hot plate models can heat up to 302°F (150°C). A cascade system provides a range of -58 to 305°F (-50 to 150°C), and single-stage systems can reach -58 to 248°F (-15 to 120°C). The thermoelectric systems, which are designed for laboratory research, do not use chemicals and are nearly maintenance-free. Features include an integral temperature controller, datalogging software, internal-to-external temperature switching and RS232 communications. Applications include cooling and heating laboratory samples and materials testing.