The difference between constant temperature water bath and constant temperature water tank

The constant temperature water bath is mainly used to accurately control the required temperature of the sample that needs to be heated, so as to compare different samples in the same temperature-controlled environment, or perform the same sample in different states at different temperatures. Comparison. Since the water in the constant temperature water bath is in a static state, there will be small temperature differences at different points. The water bath is generally used to heat the Erlenmeyer flask, and the Erlenmeyer flask with a capacity of not more than 1000 ml can only be used without removing the cover of the water bath.

The constant temperature water tank has the characteristics of internal and external circulating water flow. When using a conical flask with a capacity of 1000ml-5000ml, due to its large bottom area and high height, the unevenness of the water temperature is more serious, and the temperature uniformity is required at this time. Next, it is necessary to add a circulating pump to force the water flow to circulate to improve the uniformity of water temperature. Another purpose is to use its characteristic of external circulation to establish a second constant temperature field.

The main difference between a constant temperature water bath and a constant temperature water tank is the uniformity of water temperature, the water temperature uniformity of the water bath (≤0.5℃), and the constant temperature water temperature uniformity (≤0.05℃). At the same time, the constant temperature water tank increases the external circulation function, which greatly expands Range of use.