The low temperature constant temperature bath adopts microcomputer intelligent control and PID self-tuning adjustment, with high temperature control accuracy, small temperature fluctuation, high refrigeration efficiency and low noise. It is an ideal temperature sensor experimental instrument and constant temperature experimental instrument. . Cryogenic thermostats can be divided into vertical cryogenic thermostats and horizontal cryogenic thermostats in terms of appearance design. At present, there are many manufacturers producing low temperature thermostats, and their specifications are also different, but they are generally distinguished by direct current. Then, let's learn how to choose a suitable low temperature thermostat!

The cryogenic thermostat has the following advantages:

[1] It adopts air-cooled hermetic compressor for refrigeration, which has the advantages of fast cooling speed and low noise.

[2] The refrigeration system has multiple protection devices for overheating and overcurrent.

【3】Microcomputer intelligent temperature control, temperature stability and good operability, upper and lower limit temperature over-temperature alarm, PID automatic control.

[4] Two colors of red and green are used in double windows. The measured value of the upper window is red, the set value of the lower window is green, and the LED is displayed.

【5】Intelligent microcomputer can correct the deviation of temperature measurement value.

[6] The special user PID can be adjusted by itself.

【7】Vertical and horizontal The two DCW series are horizontal, which is easy to place in the workbench.

[8] There are internal and external circulations. During the external circulation, the constant temperature liquid in the tank can be drawn out to form two constant temperature fields.

[9] It can lead the liquid in the tank to the outside as a cold source (heat source).

[10] It can reduce the temperature of the external experimental container of the storage tank and expand the scope of use.

2. The scope of application of low temperature thermostat

Low temperature thermostatic bath is widely used in bioengineering, medicine, food, chemical industry, metallurgy, chemical analysis, petroleum and other fields, providing users with a certain field source with high precision, controllability and uniform temperature. It is the laboratory of research institutes, universities and factories. , Ideal low temperature thermostat for quality inspection department.

3. Main technical indicators of low temperature constant temperature bath

The technical parameters of the cryogenic thermostat include temperature control range, temperature control accuracy, bath volume, digital resolution, pump flow, and working voltage. These parameters are the main basis for selecting a suitable cryogenic bath. The temperature control range and bath volume are z The main selection parameters, the temperature control range is -20~100. The volume of the bathtub is generally within 10L, 10L~20L, 20L~30L or above. These two parameters are the main parameters that customers consider when choosing a low temperature thermostatic bath. .

At present, most of the low temperature thermostatic bath products on the market use LCD control panel, with digital display, simple installation, convenient operation, temperature calibration, alarm signal display and other functions; external circulation pump can be set to be used as the second constant temperature field outside the machine. The cooling liquid in the tank can be drawn out to cool the experimental container outside the machine, and the temperature can be quickly set by touching the soft key, which is easy to operate. Upper window LED digital temperature measurement value; lower window LED digital temperature set value. The microcomputer corrects the deviation of the temperature measurement value and has an over-temperature alarm system. These are the factors to be considered in the selection, and constant current can meet the customer needs of most products.