| Water bath is a common device for making materials in experiments of chemistry and other subjects.Water bath is mainly used in laboratory distillation for drying,concentration,and temperature-sensitive chemicals or biological products.It can also be used for constant temperature heating and other temperature tests.It is a necessary tool in biological,genetic,viral,aquatic,environmental,medical,health,and laboratory,analysis room for education and research.It is said that water bath has a high using frequency in all the universities and laboratories in the world.However,the safety of water bath is an important problem.Deionized water must be added when using the water bath to prevent scale formation.Adding too much water is not suitable because of overflowing.When an experiment is finished,we must turn the temperature knob to the minimum value.Moreover,the most important one is to prevent the water bath from drying without water.Since the temperature of the water bath is usually high(60 °C-80 °C),water in the bath will evaporate quickly.When the water bath is working for a long time,the water in the water bath will easily drop to the heating wire,which will cause the heating wire to be exposed in the air.Dry burning for a long time will cause the water bath broken.The most danger situation may be fire even.This paper based on the extension of the life of the water bath and the safety of the laboratory,produced a water bath automatic adding water system and a mobile phone APP.This system drops MCS-51 as the GPU,communicates with the mobile phone through the Bluetooth module,and transmits the real-time water level information to the mobile phone APP.The water level information in the water bath is measured by the distance measuring system.When the water level is lower than heating wire,the water pump will begin to work in the controll of the MCS-51.The water in the water tank will be added to the water bath to ensure the life of the water bath and the safety of the laboratory. |
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