The background and situation, continue to the instrument of a higher, newer, more requirements, such as requiring faster, higher sensitivity, better stability, less sample volume, detection of micro-damage and even destructive, remote sensing remote sensing and control more remote, more convenient, cheaper, no pollution, but also for the instrumentation technology and industrial development provided a powerful impetus, and became the instrument for further development of material, knowledge and technology base. The world nearly 20 years, microelectronics, computer technology, precision machinery technology, high sealing technology, special processing technology, integration technology, thin film technology, network technology, nanotechnology, laser technology, superconducting technology, biotechnology and other high-tech access to the rapid development.

It can be said of modern instrumentation products have become the most typical high-tech products. At present, it not only has completely broken through the traditional optical, mechanical, electrical framework toward computerization, networking, intelligent, multi-functional in the direction of rapid development, but due to extensive use of high science and technology research, interdisciplinary integrated design, sophisticated manufacturing technology and strict scientific practical applications, thus making it is moving faster, more sensitive, more reliable and simple access to be analyzed, detection, control the direction of the object marching full range of information . Through the above analysis we can see that high technology is not only the main features of modern instruments, and is the only way to revitalize the instrument industry, but also in the new century instruments and their industry mainstream.

In particular, be pointed out that: the past 10 years, due to the precision machinery, including nano-scale research, molecular-level research results of modern science, gene-level biological research, new sensor technology and intelligent technology research, and ultra-high precision Performance of Special Functional Materials, a global network of research and application technologies, including a large number of results, and other recent scientific and technological achievements of contemporary race to come out, making a fundamental instrument of change occurred in the field - these new results, not only into modern instrumentation and The industry's survival and development of soil, foundation, support and power, but also is rapidly changing the instrumentation principles and essential characteristics of the work, and make it available and have the traditional instruments simply can not match the many and implementation, full The new, ultra-high function.

With the advent of fieldbus, process measurement and control instrumentation witnessed a major turning point in the course of development and a rare opportunity

It produces not only the actual needs of customers and manufacturing techniques result of competition between firms, but also computer technology, communication technology and control technology in the field of industrial control product of the combination. The emergence of fieldbus, the replacement for the instrumentation, product upgrades, and the realization of further high-precision, high performance (especially multi-parameter online real-time monitoring and automatic monitoring and control), high stability, high reliability, high adaptability, versatility, low consumption power and has provided a huge space for development. Currently, the field bus has become a global automation technology hot spots. Field bus intelligent instrument for on-site and a development between the control room, all digital, bi-directional, multi-station communication system.