English 
The vacuum degree refers to the extent to which the gas pressure is lower than atmospheric pressure at a certain temperature. In laboratories, vacuum degree is often used to describe the performance of a vacuum system. The higher the vacuum degree, the fewer the gas molecules, the lower the pressure, and the better the vacuum system’s performance.
The vacuum degree is usually measured in pascals (Pa) or millibars (mbar), where 1 millibar equals 100 pascals. Other commonly used units of vacuum degree in laboratories include Torr and millimeters of mercury (mmHg).
For electric heating constant temperature vacuum drying ovens, there are many questions about the vacuum gauge readings. Here, an example using the vacuum drying oven produced by Kenton Instruments is provided. The vacuum gauge is a single-turn spring tube type, measuring relative pressure, with the needle moving counterclockwise. The starting point of 0 represents one atmosphere pressure (0.1 MPa). If the indicated value is Px (negative value), the pressure is P = Px + 0.1 MPa. For example, if Px = -0.02 MPa = -20 kPa, the pressure is P = Px + 0.1 MPa = 80 kPa. If Px = -0.04 MPa = -40 kPa, the pressure is P = Px + 0.1 MPa = 60 kPa. If Px = -0.1 MPa = -100 kPa, the pressure is P = Px + 0.1 MPa = 0 kPa, which indicates a large negative pressure reading on the gauge. It is important to note:
One standard atmosphere = 101325 Pa = 101.325 kPa = 0.101325 MPa ≈ 0.1 MPa, which is the value indicated by the pressure gauge at normal pressure. The vacuum degree in the parameter table refers to values smaller than 0.133 kPa or 0.000133 MPa, essentially close to 0 kPa.
Kenton Instruments is a professional manufacturer of laboratory equipment. The vacuum drying ovens produced by the company have the following advantages:
High Precision Control System:
Using an advanced microcomputer control system, it offers high precision and stability, ensuring precise temperature and vacuum degree control.
Large Capacity Design:
The vacuum drying oven has a spacious interior, capable of accommodating a large number of samples, thus improving work efficiency.
Safe and Reliable:
The vacuum drying oven is equipped with multiple safety features, such as over-temperature protection, over-pressure protection, and leakage protection, ensuring the safety and reliability of the experiment process.
Ease of Operation:
The oven is designed with user-friendly features, making it simple and convenient to operate, suitable for various laboratory needs.
The vacuum drying oven is one of the commonly used devices in laboratories. The calculation of vacuum degree is essential for the accuracy and reliability of experiments. Kenton Instruments’ vacuum drying ovens, with their high-precision control systems, large capacity design, safety features, and ease of use, are indispensable equipment for laboratories.
