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https://www.alphainstruments.com/product/model-168-differential-pressure-transmitter/

As a professional differential pressure transmitter manufacturer, Alpha instruments Inc was founded in 2005, in Massachusetts, US. We specialized in the development and manufacture of low differential pressure transducer, which were applied in HVAC, Critical Environments, Medical Industry, Semiconductor Equipment, etc.

No matter what the transmitter is, there will always be some unavoidable problems in the process of using, such as the inevitable errors of the differential pressure transmitter. And we are able to consider comprehensively when choosing the differential pressure transmitter, such as the accuracy and linearity of the differential pressure transmitter, so as to avoid the errors of the differential pressure transmitter as much as possible. Generally, there are four unavoidable errors in differential pressure transmitters, and a brief introduction is as follows.

1. Linear error: This is a factor that has less influence on the initial error of the dp pressure transmitter. The cause of the error is the physical non-linearity of the silicon chips. However, for the transmitter with amplifier, it should also include the non-linearity of the amplifier.

2. Offset error: Since the vertical offset of the differential pressure transmitter remains constant throughout the pressure range, the variations of the transmitter diffusion and laser adjustment correction will produce offset errors.

3. Hysteresis error: In most cases, the hysteresis error of the differential pressure transmitter can be completely negligible, because the silicon chips have a very high mechanical rigidity. In general, only the hysteresis error needs to be considered in the case when the pressure changes greatly.

The above three errors are unavoidable. Now can only try to choose a differential pressure transmitter, of which the precision that is suitable for oneself. Using good production equipment and technology to reduce these errors and it is also possible to perform error calibration before leaving the factory to minimize the impact of errors.