W&J Instrument CO., LTD.

  For laboratory researchers, the accuracy and precision of the weighing of experimental instruments are very important, but there are often small factors that affect the accuracy of weighing. Some   analytical balances  use the principle of electromagnetic force balance  to achieve weighing. Although the measurement accuracy and sensitivity exceed traditional mechanical precision balances, they are easily affected by external temperature and electromagnetic environment, so we are using Attention must be paid to improve the weighing accuracy. In daily life and work, various reasons can lead to the generation of static electricity. The most common cause of static electricity is the contact and separation of two materials. And similar to the movement of people, the handling of items, the placement of tools, etc., the existence of daily activities will inevitably produce static electricity. There is static electricity. If there is static electricity, this gravity may no...

  DC  thermostatic water bath   is currently the most advanced experimental device in China that integrates low temperature, constant temperature, and agitation. It is suitable for low temperature experiments in scientific research, biology, physics, medicine, chemical and other departments. It can replace dry ice and liquid nitrogen. The low-temperature reaction and related equipment provide low-temperature conditions. It can also be used as a low-temperature water tank for viscosity testing. The bottom is equipped with strong magnetic stirring to make the temperature in the tank more uniform. It is suitable for low-temperature constant temperature chemical synthesis experiments. The bottom of the DC series low temperature constant temperature tank is equipped with magnetic stirring, the stirring speed is adjustable, and the fully enclosed compressor unit is cooled. The refrigeration system has multiple protection devices for overheating and overcurrent. . The cold liqui...

  I. Overview Thermostatic water bath   adopts microcomputer intelligent control and PID self-tuning adjustment. It has high temperature control accuracy, small temperature fluctuation, high cooling efficiency and low noise. It is an ideal temperature sensing experiment instrument and constant temperature experiment instrument. Stable and reliable, easy and safe operation. Constant temperature water bath can be divided into vertical low temperature constant temperature and horizontal constant temperature water bath. There are many manufacturers producing thermostatic water baths on the market today, and their specifications are not the same, but manufacturers divided by DC are more common. These products have the following advantages: [1] The refrigeration system has multiple protection devices for overheating and overcurrent. [2] Microcomputer intelligent temperature control, stable temperature and easy operation, high and low temperature over temperature alarm, PID automatic...

  Precautions for electronic balance operation The electronic balance is a very precise weighing instrument. Whether the user can use it correctly directly affects not only the accuracy of the weighing result, but also the normal performance of the electronic balance. 1 Choosing the right   electronic balance When we choose a balance, the first thing we need to consider is whether there is a special requirement for the accuracy of the symmetrical quantity. We must avoid using an inaccurate balance for weighing as much as possible, and we also need to avoid using an excessively accurate balance. Weighing results in wasteful use. In addition, when choosing a balance, in addition to considering accuracy, you also need to consider whether the measuring range can meet the needs of weighing. Because according to the specific use situation, the selection of the range should also be based on the application, not the larger the better because the same accuracy of the balance, the large...