Instrument selection|Pressure transmitter selection Guide——Accuracy Requirement
2024-07-19 16:16Accuracy refers to the deviation between the output signal of the pressure transmitter and the actual pressure value. When choosing a industrial pressure transmitter, the required pressure measurement accuracy needs to be considered. In general, high-precision pressure transmitters are more expensive, so a trade-off needs to be made between accuracy and economy. If measurement accuracy is required for high applications, it is recommended to choose a high-precision pressure transmitter.
The accuracy of the industrial pressure transmitter is mainly determined by the following factors:
1、Nonlinear error: nonlinear error refers to the sensor output and input pressure is not an ideal linear relationship, which is the deviation between the actual characteristic curve and the theoretical straight line.
2、Hysteresis: known as hysteresis error, refers to the difference between the output signal of the dp pressure sensor during pressure rise and fall at the same pressure point.
3、Repeatability error: consistency of output reading when the same pressure is applied to the sensor several times.
4、Temperature effect: includes zero shift and sensitivity drift, is the change of pressure sensor output caused by temperature change, even without pressure change there will be errors.
5、Thermal stress and mechanical stress: deformation of the material under long-term working conditions, aging, etc. May affect the accuracy.
6、Manufacturing tolerance and assembly error: such as the manufacturing accuracy of sensitive components, packaging process, etc.
7、Environmental factors: humidity, electromagnetic interference, vibration, etc. may also indirectly affect the accuracy of the pressure transmitter.
To improve the accuracy of industrial pressure transmitters, advanced manufacturing technology and compensation algorithms are often used in modern design, such as automatic patch technology, laser resistance adjustment technology, and temperature compensation technology, to reduce the influence of the above error sources, to improve the comprehensive accuracy of products.
The precision of our ATMH(Micro-Heart) Differential/Gauge/Absolute Pressure Transmitters(https://youtu.be/Mjo9f5fgh8w?si=g8SpPPGWUqBpoE6v) is extremely high, and the typical basic errors achieved are:±0.075%. In practical applications, choosing the right accuracy level depends on the specific application requirements and budget considerations. We can provide high-precision pressure transmitter with high precision grades to help you measure data more accurately.