Pressure sensor to measure negative pressure or vacuum often encountered, often contact suction pressure sensor can find the maximum negative pressure sensor of measuring the negative pressure range is - 100 kpa or - 0.1 MPA. But there are very few manufacturers that can detect even lower - 300 kpa, how did this happen?

This is the analysis of the two different angles. Learned to know the physical is the pressure of the vacuum - 100 kpa, so in general the minimum pressure is 100 kpa pressure sensor measurement is according to this, so the pressure sensor on market basically is the lowest kap can - 100, the - 300 kpa sensor is how to return a responsibility? - 300 kpa actually not by reference to the atmospheric pressure, 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, it will display a - 300 kpa, say so - 300 kpa pressure are produced in this way. It is not a reference to the atmospheric pressure.

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.