[Daily Question 20090218] Why should the detection element of the differential pressure transmitter be made into a membrane box structure? Is it okay to use a single diaphragm?
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[Daily Question 20090218] Why should the detection element of the differential pressure transmitter be made into a membrane box structure? Is it okay to use a single diaphragm? Summarize: The detection element of the differential pressure transmitter generally consists of a single diaphragm and a capsule assembly. The single diaphragm is easy to process and has high sensitivity, but it cannot withstand one-way overload. Most of the detection components of differential pressure transmitters use membrane box components. This is because the membrane box components have good sensitivity and linearity within the differential pressure range of use. When the differential pressure exceeds the use range, that is, when one-way overload occurs, the membrane closure not only does not break, but also rarely has any impact. This is a characteristic of the membrane box structure. Since the membrane box is filled with silicone oil, it not only transmits pressure but also has a damping effect, so the instrument output is stable.
Because silicone oil has a high boiling point, small expansion coefficient, and low freezing point, changes in ambient temperature will not affect measurement accuracy and it is non-corrosive.
The membrane box has good sensitivity and linearity and will not be damaged when pressed in one direction. A single diaphragm cannot withstand one-way overload and is rarely used!
Because the membrane box assembly has good sensitivity and linearity within the differential pressure range of use, and when the differential pressure exceeds the use range, that is, when there is a one-way overload, the membrane box not only does not break, but also rarely has any impact.； Since the diaphragm is filled with silicone oil, in addition to transmitting pressure, it also has a finite nips function, so the instrument output is stable. ； It can be seen from the above that a single diaphragm cannot withstand one-way overload, although it is easy to process and has high sensitivity, so it is not suitable for use.
Because the membrane box assembly has good sensitivity and linearity within the differential pressure range of use, and when the differential pressure exceeds the use range, that is, when there is a one-way overload, the membrane box not only does not break, but also rarely has any impact.； Since the diaphragm is filled with silicone oil, in addition to transmitting pressure, it also has a finite nips function, so the instrument output is stable.
Because the membrane box assembly has good sensitivity and linearity within the differential pressure range of use, and when the differential pressure exceeds the use range, that is, when there is a one-way overload, the membrane box not only does not break, but also rarely has any impact.； Since the diaphragm is filled with silicone oil, in addition to transmitting pressure, it also has a finite nips function, so the instrument output is stable. ； It can be seen from the above that a single diaphragm cannot withstand one-way overload, although it is easy to process and has high sensitivity, so it is not suitable for use.
A single diaphragm cannot withstand one-way overload, so a diaphragm structure is generally used. The diaphragm structure has good sensitivity and linearity, will not be damaged during single-phase overload, and has high stability.
Because the membrane box assembly has good sensitivity and linearity within the differential pressure range of use, and when the differential pressure exceeds the use range, that is, when there is a one-way overload, the membrane box not only does not break, but also rarely has any impact.； Since the diaphragm is filled with silicone oil, in addition to transmitting pressure, it also has a finite nips function, so the instrument output is stable. ； It can be seen from the above that a single diaphragm cannot withstand one-way overload, although it is easy to process and has high sensitivity, so it is not suitable for use.
Because the membrane box assembly has good sensitivity and linearity within the differential pressure range of use, and when the differential pressure exceeds the use range, that is, when there is a one-way overload, the membrane box not only does not break, but also rarely has any impact.； Since the diaphragm is filled with silicone oil, in addition to transmitting pressure, it also has a finite nips function, so the instrument output is stable. ； It can be seen from the above that a single diaphragm cannot withstand one-way overload, although it is easy to process and has high sensitivity, so it is not suitable for use.
Because the diaphragm can withstand one-way working pressure, the working pressure of the differential pressure transmitter is often much greater than the measured differential pressure. Due to careless operation or other abnormal reasons, the measuring element will inevitably bear a one-way working pressure that is much larger than the measuring range. While a single diaphragm is easy to process and has high sensitivity, it cannot withstand one-way overload, so most differential pressure transmitters use a diaphragm. At the same time, the membrane box component has good sensitivity and linearity within the differential pressure range used. When the differential pressure exceeds the range, it is less affected.
The differential pressure signal measured by the differential pressure transmitter, how to measure the differential pressure when the detection element is made into a single diaphragm?
Compared with a single diaphragm, the diaphragm box can effectively carry overpressure, has better linear sensitivity, and has good recovery ability from deformation.
Because the membrane box assembly has good sensitivity and linearity within the differential pressure range of use, and when the differential pressure exceeds the use range, that is, when there is a one-way overload, the membrane box not only does not break, but also rarely has any impact.； Since the diaphragm is filled with silicone oil, in addition to transmitting pressure, it also has a finite nips function, so the instrument output is stable. ； It can be seen from the above that a single diaphragm cannot withstand one-way overload. Although it is easy to process and has high sensitivity, it is not suitable for use.
Because the membrane box assembly has good sensitivity and linearity within the differential pressure range of use, and when the differential pressure exceeds the use range, that is, when there is a one-way overload, the membrane box not only does not break, but also rarely has any impact.；
Because the membrane box assembly has good sensitivity and linearity within the differential pressure range of use, and when the differential pressure exceeds the use range, that is, when there is a one-way overload, the membrane box not only does not break, but also rarely has any impact.； Since the diaphragm is filled with silicone oil, in addition to transmitting pressure, it also has a finite nips function, so the instrument output is stable. ； It can be seen from the above that a single diaphragm cannot withstand one-way overload, although it is easy to process and has high sensitivity, so it is not suitable for use.
Because the membrane box assembly has good sensitivity and linearity within the differential pressure range of use, and when the differential pressure exceeds the use range, that is, when there is a one-way overload, the membrane box not only does not break, but also rarely has any impact.； Since the diaphragm is filled with silicone oil, in addition to transmitting pressure, it also has a finite nips function, so the instrument output is stable. ； It can be seen from the above that a single diaphragm cannot withstand one-way overload, although it is easy to process and has high sensitivity, so it is not suitable for use.
Why should the detection element of the differential pressure transmitter be made into a membrane box structure? Is it possible to use a single diaphragm? answer: The detection element of the differential pressure transmitter generally consists of a single diaphragm and a capsule assembly. The single diaphragm is easy to process and has high sensitivity, but it cannot withstand one-way overload. Most of the detection components of differential pressure transmitters use membrane box components. This is because the membrane box components have good sensitivity and linearity within the differential pressure range of use. When the differential pressure exceeds the use range, that is, when one-way overload occurs, the membrane closure not only does not break, but also rarely has any impact. This is a characteristic of the membrane box structure. Since the membrane box is filled with silicone oil, it not only transmits pressure but also has a damping effect, so the instrument output is stable.