Negative pressure of pressure sensor

Pressure sensor is used to measure the negative pressure and vacuum degree, often contact suction pressure sensor can find the maximum negative pressure sensor of measuring the negative pressure range is - 100 kpa or - 01MPA。 But there are very few manufacturers that can detect - 300 kpa is even lower, this is what reason?

this is the analysis of the two different angles. Learned to know the physical vacuum pressure is - 100 kpa, so that the minimum pressure is - general pressure sensor 100 kpa is according to this, so the pressure sensor on market basically is the lowest can - That - 100 kap 300 kpa sensor is how to return a responsibility? - 300 kpa not by reference to the atmospheric pressure, actually physically all pay attention to a reference, you can understand it, in a sealed box filled with 300 kpa high pressure gas, there is a set of vacuum inside the box, we use the negative pressure sensor in the outside big boxes to measure small box pressure inside, this will show a - 300 kpa, say so. . . This is 300 kpa pressure. It is not a reference to the atmospheric pressure.

to understand the concept of choosing negative pressure sensor is very helpful to us, so we don't choose the wrong pressure sensor, which is why we often help the customer to choose the use of the pressure sensor will first ask he to ask him how much is the range of environment. Only in this way will not choose the wrong pressure sensor.