There are usually two methods for identifying vacuum degree

There are usually two methods for identifying vacuum degree:8HfTextile Testing Instruments, Testing Equipment Manufacturer
One is to useamp;quo; Pressureamp; Ldquo; Vacuum degree; (i.e. how much pressure is higher than the theoretical vacuum) marking; In practical situations, the pressure value of the vacuum pump ranges from 0 to 101.325KPa.8HfTextile Testing Instruments, Testing Equipment Manufacturer
The pressure value needs to be measured using a pressure gauge. At an altitude of 0 and 20 ℃, the initial value of the instrument (vacuum gauge) used to measure vacuum degree is 101.325KPa. (i.e., one standard atmospheric pressure) The second is to useamp;quo; Relative pressureamp; Ldquo; Relative vacuum degree; (i.e. how much pressure is lower than the quot;atmospheric pressurequot;) to indicate. quot;Relative vacuum degreequot; refers to the difference between the pressure of the measured object and the atmospheric pressure at the measurement location. Measure with a regular vacuum gauge. In the absence of vacuum (i.e. at atmospheric pressure), the initial value of the table is 0.8HfTextile Testing Instruments, Testing Equipment Manufacturer
When measuring vacuum, its value ranges from 0 to -101.325KPa (usually expressed as a negative number). Commonly used in the vacuum industry; Vacuum degree;, It is also scientific to use pressure identification; Refers toamp;quo; Extreme vacuum, vacuum degree, pressure;, Butamp;quo; Relative vacuum degree; (Relative pressure, vacuum gauge pressure, negative pressure) Due to its simple measurement method, widespread use of measuring instruments, ease of purchase, and affordable price, it is also widely usedamp; Ldquo; Vacuum degree; As the name suggests, it is the degree of vacuum. A gas state with a pressure below 101325 Pascals (approximately 101KPa of standard atmospheric pressure) within a given space.8HfTextile Testing Instruments, Testing Equipment Manufacturer
The commonly used vacuum units include Pa, Kpa, Mpa, atmospheric pressure, kilograms (Kgf/cm2), mmHg, mbar, bar, PSI, etc. The approximate conversion relationship is as follows: 1MPa=1000KPa 1KPa=1000Pa1 atmospheric pressure=100KPa=0.1MPa1 atmospheric pressure=1 kilogram (Kgf/cm2)=760mmHg 1 atmospheric pressure=14.5PSI1KPa=10mbar1bar=1000mbar Vacuum pump type Starting pressure (Pa) 1amp;times; 105 piston vacuum pump 1amp;times; 105~1.3amp;times; 102 1amp;times; 105 rotary vane vacuum pump 1amp;times; 105amp;flash; 6.7amp;times; 10-1 1amp;times; 105 water ring vacuum pump 1amp;times; 105amp;flash; 2.7amp;times; 103 1.3amp;times; 103 Roots vacuum pump 1.3amp;times; 103amp;flash; 1.3 1.3amp;flash; 1.3amp;times; 10-5 turbo molecular pump 1.3 1amp;times; 105 steam jet pump 1amp;times; 105amp;flash; 1.3amp;times; 10-1 1.3amp;times; 10-7 oil diffusion pump 1.3amp;times; 10-2amp;flash; 1.3amp;times; 10amp;lt; 1.3amp;times; 105 oil vapor jet pump 1.3amp;times; 10amp;flash; 1.3amp;times; 10-2 1amp;times; 105 molecular sieve adsorption pump 1amp;times; 105amp;flash; 1.3amp;times; 10-1 6.7amp;times; 10-1 sputtering ion pump 1.3amp;times; 10-3amp;flash; 1.3amp;times; 10-9 1.3amp;times; 10-2 titanium sublimation pump 1.3amp;times; 10-2amp;flash; 1.3amp;times; 10-9 1.3amp;times; 10 zirconium aluminum vacuum pump 1.3amp;times; 10amp;flash; 1.3amp;times; 10-11 1.3amp;flash; 1.3amp;times; 10-1 low-temperature pump 1.3amp;flash; 1.3amp;times; 10-11