Low Temperature Thermostatic Circulating Controller, that is, constant temperature circulating water bath, was successfully designed and developed according to the needs of biomedical experimental research. It provides an ideal constant temperature source for biological and biochemical experimental research or other high-precision temperature control, and is an ideal supporting device for electrophoresis instruments. It is widely used in research experiments and identification work in hospitals, scientific research, forensic identification, etc. It can also be used in conjunction with measuring instruments that require constant temperature.
How a Low Temperature Thermostatic Circulating Controller works
A Low Temperature Thermostatic Circulating Controller is a Low Temperature Thermostatic Circulating Controller that uses the principle of steady-state bubbles to control temperature. The main liquid pool is equipped with liquid nitrogen. By adjusting the gap of the conical air plug, the nucleation boiling condition of the gas-liquid interface is changed, so that the heat leakage of the constant temperature block is roughly stable at a certain value, and then the heating current is adjusted by the temperature controller. It can quickly change the temperature of the sample between the cryogenic liquid temperature and room temperature (80-320K), and accurately balance it at the set temperature; through decompression-control pressure, it can also reach a lower temperature.
Compared with other temperature control methods, the liquid nitrogen thermostat has the advantages of wide temperature zone, convenient temperature control at low temperature, less refrigerant consumption, no mechanical vibration, and the sample is in vacuum (so the leakage current is small).
A device that uses a cryogenic liquid or gas refrigerator to keep the sample in a space with a constant or variable cryogenic temperature, and to measure one or more physical quantities of the sample. Low Temperature Thermostatic Circulating Controller is the general term for the experimental Dewar vessel and the internal device of the vessel. It is widely used in the measurement of thermophysical properties at low temperatures, the mechanical properties and experiments of materials at low temperatures, optical physics research, the measurement of magnetocaloric properties of materials, and superconductivity experiments. field.
Low Temperature Thermostatic Circulating Controllers are not the same due to the difference in experimental purpose, precision, temperature range and temperature control method.
The structure of the thermostat should be specially considered according to the content of the measurement. For example, the calorimeter thermostat for measuring specific heat should consider reducing the heat leakage to a negligible level as much as possible. The thermostat for thermal conductivity measurement should consider a heat flow path, which can establish a constant heat flow on the sample. The most convenient way to achieve low temperature is to immerse the device in a cryogenic liquid. If you use liquid nitrogen, you can get 77K, and if you use liquid nitrogen, you can get 4.2K. The liquid is evacuated and decompressed, and the temperature corresponding to the saturated vapor can be obtained by using a thermostat to keep the vapor pressure of the liquid constant, and any temperature from the boiling point to the triple point can be selected. It is also possible to insulate the sample space from the low-temperature liquid pool by pumping into a high vacuum, and then use electric heating to control the temperature of the sample through an electronic temperature controller, so that a wide temperature range can be obtained, and at the same time, a good Excellent temperature uniformity and stability are essential for accurate measurement of physical quantities.
DHH-C2001 Low Temp Thermostatic Controller
DHH-C2001 Low Temp Thermostatic Controller is suitable for low temperature constant temperature reaction tank, high and low temperature circulator and other equipment. The touch screen instrument can choose cascade temperature control, the heating time is faster, and the temperature control accuracy is higher.
The instrument has high temperature control precision, easy operation, and digital display of temperature preset and measurement, which is clear and intuitive. The refrigeration system is a fully enclosed air-cooled compressor unit, and the user does not need to install a water-cooling system, it can be used immediately after power-on. The sink is made of stainless steel, which is beautiful and corrosion-resistant. The overall volume is small, the weight is light, the noise is low, and the heating and cooling speed is fast.
