Brief introduction of pressure sensor and matters needing attention in use
Release date: July 6, 2019Hits: 61
Use and purchase in daily lifePressure sensorIt needs to have a certain understanding, especially when using, if you do not understand the precautions, it is easy to cause machine failure or damagesensorThe occurrence of the phenomenon may lead to the decrease of measurement accuracy or even the data error.
Pressure sensorWhen the pressure is felt, the pressure can be converted into an output signal that can be usedsensorIt's based on the principle of piezoelectric effect, usually piezoelectricsensorIn this case, only when the static resistance of the measurement circuit is not affected by the external force, can the static resistance be preserved.
In daily industrial practice,Pressure sensorHas become a very widely usedsensorIn many industries, in order to control the quality of the environment, it has been put into use.
Pressure sensorIt's based on the polarization effect.So what is the polarization effect? Crystal, I believe you are familiar with it.Crystals are anisotropic, but non crystals are isotropic.When the shape of a certain crystal medium is changed by the mechanical force in a certain direction, the polarization effect will be formed.When the mechanical force disappears, the crystal will return to its original state of no charge.Therefore, the so-called polarization effect means that when subjected to mechanical external force, some crystals may appear charged effect.
Many units and industries are using itPressure sensorThere will be a lot of problems, so before you use it, you should understand the relevant matters needing attention in the use process.Firstly, it is necessary to avoid the transmitter from contacting with corrosive and high temperature medium to avoid damaging it; the pressure pipe should be installed at the place where the temperature fluctuation is small; when measuring some medium with high temperature, the condenser must be connected, because the temperature of the transmitter should not exceed a certain limit when working;To keep the conduit unobstructed; in cold winter, if the transmitter is installed outdoors, you should also pay attention to take anti freezing measures, which is to prevent the liquid in the pressure mouth from expanding due to freezing, which is easy to damagesensorWhen wiring, the user should put the cable through the waterproof joint or flexible pipe, and then tighten the sealing nut, which can prevent the liquid from leaking into the transmitter shell through the cable.Now let's talk about the matters needing attention when measuring the liquid pressure and the gas pressure, we should distinguish clearly.When measuring the liquid pressure, the pressure tap must be opened at the side of the process pipe, which is to prevent sediment deposition. At this time, the place where the transmitter is installed should be prevented from the impact of other liquidssensorDamage due to excessive pressure.When measuring the gas pressure, the pressure tap must be opened at the top of the process pipe. Note that this is different from that when measuring the liquid pressure. Then the transmitter must be installed on the upper part of the process pipe, which is convenient for the accumulated liquid to be easilyInto the process pipeline.
