Supplied with temperature probe that is inserted directly into sample or sample block, EchoTherm™ Model IC50 displays and controls temperature to ±0.1°C. Peltier-driven unit can freeze, chill, or heat samples from -10.0 to 110.0°C in assay plates, centrifuge tubes, vials, test tubes, and most any other sample container. Measuring 65 x 8.75 x 3.5 in., IC50 includes countdown timer, surface hot indicator lamp, data logger, and RS232 I/O port to control unit by computer or to record data.