Why can't the vacuum pump reach the limit pressure?

Feb. 24. 2023

When the vacuum pump is in use, the limit pressure can not reach? It may be directly related to the local atmospheric pressure.

How to remove scale?

Feb. 23. 2023

How to remove the scale in the heating bath of the rotary evaporator, usually baking soda, acetic acid, citric acid, etc.

How to avoid the influence of lotime on experimental samples?

Feb. 22. 2023

Lotime is a substance that is easily dissolved in organic solvents. It will dissolve in pentane, hexane, petroleum ether and dichloromethane, and attach to the inner wall of glass.

How to choose air cooling and water cooling for heater chiller?

Feb. 20. 2023

There are two cooling modes of heater chiller: water cooling and air cooling. Both cooling modes are selected according to the environment of the heater chiller.

Temperature control test of semiconductor.

Feb. 15. 2023

Heater chiller test equipment is applied to the adaptive temperature test of semiconductors and chips in the range of -120℃ ~ 200℃.