Differential pressure transmitters have become an important part of measuring instruments, and like other instruments, differential pressure transmitters are in a period of rapid development and change. Today we are going to understand the development of differential pressure transmitters.
In the beginning, differential pressure measurements were made using the principle of force equilibrium. The force-balanced differential pressure transmitter uses the negative feedback principle of depth to reduce the direct influence of the modulus of the sensitive element with ambient temperature, elastic hysteresis and its nonlinear deformation, thereby ensuring measurement accuracy. However, this method is complex, cumbersome, and has static pressure errors that are difficult to eliminate.
Due to the development of new materials, elastic materials with a small modulus of elasticity and temperature coefficient have appeared. In particular, the development of electronic detection technology has made it possible to detect small displacements, thus allowing for small deformations of elastic materials, which further reduces the variation caused by nonlinearity and elastic hysteresis. All this has created the conditions for the development of new differential pressure transmitters with open loops. This type of capacitive differential pressure transmitter is commonly used on the market today. The differential pressure transmitter not only has undergone a fundamental change from closed-loop to open-loop in principle, but also has the characteristics of simple structure, reliable operation, no static pressure error and convenient maintenance.
With the update of science and technology, various other new types of transmitters and vibrating wire and diffusion silicon transmitters have also been successfully developed and put into production and use. The successful development of intelligent differential pressure transmitters is a product of the development of computer and communication technology. The intelligent differential pressure transmitter has high signal conversion accuracy, small direct impact of ambient temperature changes, small direct impact of static pressure and vibration, and a particularly small range ratio. As a result, intelligent differential pressure transmitters can meet the needs of a wide range of measurement environments. Another feature of the intelligent differential pressure transmitter is that it has a good communication function. Through the simple operation of the intelligent differential pressure transmitter field communicator, remote setting, change and adjustment can be realized, and these functions bring great convenience to the user’s on-site use and maintenance.
Nowadays, due to the development of industrial modernization, the automation system is becoming more and more large-scale and complex, and the industrial production link has changed from the single purpose of ensuring the stability of production and operation in the past to today’s large-scale centralized and optimized control. In addition, the expansion of application fields also requires differential pressure transmitters to meet more and more functions, and the performance requirements are becoming more and more stringent. To put it simply, the differential pressure transmitter needs to meet high precision, strong adaptability to the measurement object and use environment, miniaturization, digitalization, easy installation and maintenance, and especially strong reliability, which directly affects the reliability and safety of the entire automation system.
The development of differential pressure transmitters is dependent on technological innovation and progress in all walks of life. At the same time, the application of new differential pressure transmitters also provides more convenient sensing measurement and monitoring solutions for all walks of life.
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