1. The low temperature constant temperature bath adopts fully enclosed environmental protection compressor refrigeration, and the system adopts international advanced fluorine free environmental protection refrigeration technology, which has the advantages of energy saving and environmental protection.

2. The refrigeration system has multiple protection devices for overheat and over-current.

3. It has the advantages of intelligent temperature control, simple operation, good temperature stability, upper and lower limit temperature over temperature alarm and PID automatic control.

4. Large screen liquid crystal display, using international display standards, with a variety of function indicators, users can see at a glance.

5. The deviation of temperature measurement can be corrected by intelligent microcomputer, and the accuracy of temperature correction can reach 0.01 ℃.

6. Special user PID can be self-adjusting, with temperature self-tuning function.

7. There are internal circulation and external circulation. In the external circulation, the constant temperature liquid in the tank can be led out to establish a second constant temperature field. It can also be used as a cold source (heat source) to lead out the liquid in the tank, which can reduce (increase) the temperature of the experimental container outside the tank and expand the scope of use.

8. The instrument adopts double temperature sensors, and the temperature control accuracy is up to ± 0.01℃

Low temperature constant temperature bath is a necessary equipment in laboratory. It is widely used in petroleum, national defense, metallurgy, chemical industry, physics, bioengineering, chemistry, medicine and health, life sciences, electronic instruments, quality inspection and measurement, factory experiments, universities, scientific research institutions and other research departments.

At present, there are mainly two types of products on the market, indoor and outdoor. Single room and multiple pieces can be built. There are two kinds of configuration, i.e. air cooler and evaporator exhaust pipe, which can be selected at will. For example, in areas with relatively water shortage, air-cooled air cooler can be selected. The refrigeration control system of the refrigerator car should adopt the microcomputer full-automatic control system, which is unattended to store drugs, medical devices, etc., and monitor and record the temperature and humidity of the storage area.

1. Suitable for fruits and vegetables at about 0 ℃: most of the rhizomes and leafy vegetables are cool loving fruits and vegetables (originated from temperate and frigid zones), and the suitable storage temperature is 0-2 ℃, not lower than 0 ℃. Cabbage, spinach, cauliflower, celery, carrot, peach, grape, apple. When these fruits and vegetables are purchased, it is better not to put them into the cold storage immediately, because low temperature will inhibit the enzyme activity of fruits and vegetables, so that the residual poison can not be decomposed. Therefore, it is best to store these fruits and vegetables at room temperature for one day before putting them into the cold storage.

2. Fruits and vegetables suitable for about 10 ℃ temperature: tomato, cucumber, persimmon pepper, litchi, balsam pear, cowpea, pumpkin and other vegetables, suitable storage temperature is generally about 10 ℃; Due to the high water content, these fruits and vegetables will turn black, soft and taste bad after long-term cold storage.

3. Suitable for fruits and vegetables with temperature above 10 ℃: tropical fruits should be stored in a dark and cool place. If you must put it into the cold storage, it should be placed in the cold storage with higher temperature, and the storage time should not exceed two days. Banana, lemon, pumpkin and other fruits and vegetables suitable storage temperature is 13-15 ℃, low temperature storage easy to make it black, rotten.

4. Not suitable for refrigerated food: Ham should not be refrigerated, because it will make the fat precipitation, resulting in ham caking or loose. After refrigerated, the surface of chocolate is easy to form white frost, thus losing its original flavor. Bread and other pasta should not be stored in the cold storage, otherwise it will lead to the amylopectin part of its amylopectin slowly associate, thus gradually harden, appear "aging" phenomenon. If the storage temperature is higher than the optimum temperature, it will accelerate the aging process and shorten the storage period; If the storage temperature is lower than the optimum temperature, it will lead to chilling injury and freezing injury. The critical temperature of low temperature varies with varieties.

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