A constant temperature water tank is a device that heats and heats a sample until it reaches a certain temperature, and is used to keep the sample at a certain temperature for a certain period of time.
The frozen thermostat is a device that can be used for experiments that require precise temperature control even at room temperature and low temperature, and it is possible to experiment with various types of samples at a wide range of temperatures.
An oil tank is a device that uses a fluid, not water, to increase or maintain a temperature range that cannot be raised by a general constant temperature tank.