How to verify the multi-point temperature tester of constant temperature water bath pot

Constant temperature water bath pots are generally filled with oil and silicone oil, because oil has better thermal conductivity and uniformity, and the highest temperature is generally not higher than 300℃. The temperature probe for multipoint temperature measurement can be put into the oil bath pot, and the oil bath pot can be kept at a constant temperature. For example, if the temperature of the oil bath pan is set to 150℃, the temperature of the oil bath pan will be stabilized at 150℃. At this point, you can compare the change and deviation between the temperature displayed by the oil bath tray and the temperature of the multi-point temperature tester. Of course, this time depends on whether you believe in the accuracy of multi-point thermometer or the accuracy of oil bath pot. For example, the multipoint thermometers of TP 1000 and TP700 in Shenzhen Tuopu are more accurate, such as Peking University, Tsinghua, Southeast University, Nanjing University and Shanghai Jiaotong University, all of which are useful.