Thermostatic water bath circulator | thermostatic circulating water bath is more and more widely used in our daily experiments and production activities. Now Let's list some commonly used working tank media for you, so that you can select suitable working tank media according to your actual application in the experiment.
When selecting a medium for Thermostatic water bath circulator | thermostatic circulating water bath , the parameters such as specific heat, thermal conductivity, viscosity and flash point should be taken into account. In the selection, should be as far as possible to choose the specific heat of small, high thermal conductivity, low viscosity, high open flash point working medium, on this basis, take into account the economy, convenience and safety of working medium. When selecting the medium for the Thermostatic water bath circulator | thermostatic circulating water bath , we should also consider whether it is convenient for storage and transportation, whether it has certain economy, and whether it is convenient and safe for operation. The working medium should be non-toxic to human body or very low toxicity, and easy to clean. When not in use, it should be easy to store in a container and not easy to deteriorate, burn or explode.
These are a few of our experiments in the common temperature tank media as below:
1.water
Water is the most common working medium in a Thermostatic water bath circulator | thermostatic circulating water bath. Its advantages are cheap price, low viscosity, with a good thermodynamic characteristics. The upper limit its working temperature is determined by the local atmospheric pressure, usually 5 ℃ in a 100 c good working temperature scope. Its disadvantage is that the working temperature range is narrow, and easy to scale algae and lead to rust equipment, so for the constant temperature tank working medium, it is best to use pure water or distilled water to reduce scale, regularly clean, frequently change water, in order to maintain a good test environment.
2: silicone oil
Silicone oil is an artificial compound, with a variety of viscosity and a wide temperature range, but also has good thermodynamic properties and lower flammability, can meet the requirements of a variety of thermostat tank, but also a widely used thermostatic water bath circulator | thermostatic circulating water bath working medium. Its disadvantage is that at high temperature will produce a larger soot, and will have an oxidation reaction with the oxygen in the air. If this oxidation reaction continues, the coking phenomenon mentioned above will occur. In daily use, if the color of silicone oil turns dark, it usually indicates that an oxidation reaction has taken place. If the color of shantou has changed to a deep level, the working medium should be replaced. When using silicone oil as the medium, customers with conditions can be placed in a ventilated place to use. In addition, some silicone oil in low temperature area is the scope of work, in some areas with higher humidity, the water vapor in the air will condense into thermostatic bath, when through the pipe cooling, due to the oil-water separation, will the water condensation in tube formation of ice on the road to cover, lower the cooling efficiency of cooling pipe, a thermostatic bath temperature will slow down. At this time, it is suggested that the customer can set the temperature of the Thermostatic water bath circulator | thermostatic circulating water bath to about 100 degrees for water evaporation. To extend the service life of the medium.
3: alcohol
Alcohol is an ideal medium for cryogenic tank. Because alcohol can absorb water, it will not cause the phenomenon of water freezing in cryogenic oil tank. Moreover, it has very low viscosity and good thermodynamic characteristics. But the absorption of alcohol to water has a certain limit, when it reaches the saturation state, its physical and chemical characteristics will become very unstable, resulting in the performance of the thermostat. Therefore, the alcohol must be replaced when it reaches saturation. At the same time, because alcohol is volatile, the flash point is very low, so the use of alcohol should pay attention to safety, keep the use in the low temperature range, and when not in time into the closed container, in order to reduce its volatile.
4: bath salts
Thermal bath salts in the absence of pollution has good thermodynamic properties and stability, it is typically used for 200 C ^ - 550 ℃ temperature range, but when the temperature is greater than 454 ℃, it will be slow to produce thermal decomposition, eventually led to the decrease of the temperature field of the stability and uniformity. In addition, it has a strong hygroscopicity, must be placed in a dry place to prevent moisture. In addition, it is strictly prohibited to contact with water during work, otherwise, it is extremely easy to cause accidents when high-temperature bath salt sputtering.
Thermostatic water bath circulator | thermostatic circulating water bath in BuenoBiotech
The above mentioned media are common working mediums in actual production and experiment, and other working mediums such as perfluorocarbons and white kerosene have their own characteristics and applicable working temperature range. In practical application, we can choose appropriate working mediums according to our actual needs and the technical performance of the constant temperature tank. Generally speaking, in the low temperature range, alcohol is a good working medium, can form a good temperature field, in the middle temperature range, silicone oil and water have their own different temperature range, can form a uniform and stable temperature field, in the high temperature range, bath salt is the ideal choice, but in the operation must pay attention to safety