Development history of pressure transmitters

The development of pressure transmitters has gone through four stages:
(1) Early pressure transmitters used a large displacement working principle, such as mercury float differential pressure gauges and capsule differential pressure transmitters, which had low accuracy and were bulky.
(2) In the 1950s, there were force balanced differential pressure transmitters with slightly higher accuracy, but the feedback force was small, the structure was complex, and the reliability, stability, and vibration resistance were poor.
(3) In the mid-1970s, with the emergence of new processes, materials, and technologies, especially the rapid development of electronic technology, displacement transmitters with small size and simple structure emerged.
(4) In the 1990s, with the rapid development of science and technology, the measurement accuracy of transmitters improved and gradually moved towards intelligence. Digital signal transmission was more conducive to data acquisition, and different types such as diffused silicon piezoresistive transmitters, capacitive transmitters, differential inductance transmitters, and ceramic capacitive transmitters emerged. [3]
(5) Entering the 21st century, the third-generation transmitters - digital intelligent transmitters - have gradually entered our field of vision, with representative products such as Rosemount's 3051S transmitter, ABB's 2600T265 series transmitter, Yokogawa's EJX transmitter, etc. The third-generation transmitter adopts advanced detection technology to eliminate the impact of moisture, dust, and other harsh on-site environments on the measurement of the transmitter, resulting in higher accuracy; Stable for more than 5 years; The communication protocol is more comprehensive, and the new transmitter has also passed safety certification, ensuring safe shutdown when process conditions exceed critical values.