About pressure transmitter negative pressure indication

The pressure transmitter uses for to measure that the negative pressure or the vacuum degree meet frequently, will contact the negative pressure pressure transmitter’s person to discover that frequently the general negative pressure sensor measured the negative pressure the greatest measuring range will be – 100kpa Mechanical Buzzer or is – 0.1MPA. But had few factories saying that could measure – 300kpa was even lower, how was this a matter?
Actually this is two different angle analyzes. Studies physics to know that vacuum the pressure is – 100kpa, therefore said the general pressure transmitter surveys the minimal pressure pressure is – 100kpa is the root comes according to this, therefore in the market condition negative pressure sensor base this on is measures – 100kap feeble-mindedly, how is that – 300kpa sensor a matter? – 300kpa is not actually refers to the atmospheric pressure to come, in physics is fastidious about a frame of reference, you may understand like this, fills 300kpa in inside a seal’s box the compressed gas, inside the wrap is putting a vacuum box, inside we use the negative pressure sensor to place in the big box to survey the small car receivers box’s pressure, will obviously like this show – 300kpa, therefore said that – the 300kpa pressure will be produces like this. It refers to the atmospheric pressure.
Had understood this concept chooses the negative pressure sensor to us has the help very much, like this we will not choose the wrong pressure transmitter, will this be our guild merchant household round loudspeaker selection pressure sensor’s time period of five days first will ask why that frequently his use environment asked again his measuring range will be how many. Only will then like this only then not choose the wrong pressure transmitter.