GR150 series digital temperature controller is a high-performance constant temperature controller developed and produced by Sleic Instruments Co., Ltd. It has double display, double heater, external probe socket, powerful internal pump, adjustable high and low temperature alarm setting, five operation languages optional, maximum cooling/heating range (depending on the size of the bath) and other features, and is widely used in biological medicine, chemistry, pharmacy, food, water quality analysis and other fields of temperature control.