In the selection of 3151 intelligent flange liquid level transmitter, there is a very striking statement - the range ratio of 3151 intelligent flange liquid level transmitter / 3051 pressure transmitter is 100:1. At first, I thought that this expression meant that the actual measurement range is 100, and the theoretical measurement range is 1. This understanding is obviously incorrect. After consulting the data, it is found that the range ratio is actually the ratio of the maximum measurement range to the minimum measurement range. It is not that the larger the range ratio, the better the performance of the transmitter
When it comes to the range ratio, first introduce a question of using the range. A pressure transmitter with a measurement range of 0-200kpa. When the actual measured pressure is 50kPa, the range we choose should be 0-100kpa, which is the range used. If the range ratio is 10:1, the minimum range is 0-25kpa, and the range used is 0-20kpa, the accuracy of the transmitter will be reduced. When the range used is 0.50kpa, the accuracy of the instrument can be guaranteed. The difference between the range used and the maximum range shall not be too large, otherwise the accuracy is not up to standard.
The quality of the transmitter depends not only on the range ratio, temperature and other influencing factors
1. Reasonable selection of materials
It is the fundamental method to select corrosion-resistant metal or non-metallic materials to manufacture instrument parts. For example, the instrument parts made of titanium and tantalum have strong corrosion resistance to chlorine chemical medium; the instrument parts and gaskets made of polytetrafluoroethylene are also widely used in various corrosive medium environments.
2. Add protective layer
It is a very common anti-corrosion method in industry to make a protective layer on instrument parts or components. According to the different materials and forming principles of the protective layer, it can be divided into the following three types:
Metal protective layer. Including spraying, electroplating, hot-dip, carburizing, etc.
Non metallic protective layer. Such as paint, acid resistant cement, rubber, plastic, enamel, etc;
The non-metallic protective film is chemically treated on the metal surface to form oxide film, phosphate film and other protective films;
Long term stability and reliability are important criteria for 3151 intelligent flange level transmitter. The accuracy, measuring range and temperature / static pressure influence coefficient of the transmitter can not fully reflect the whole performance of the transmitter, because these data are scattered, and each data can not reflect the comprehensive performance of the transmitter. For the current transmitter, we should pay more attention to its long-term stability and reliability, which should be the most concern of the user!
In the future, Hua Heng instrument will continue to adhere to the "craftsman spirit" of "craftsman Hua Heng instrument will continue to do one thing well" throughout its life. While producing and researching, the R & D team will continue to enrich technology, improve product performance, and make industrial automation instruments economic and durable to promote China's industrial development by conducting numerous tests on instruments in various environments Products, to become the domestic instrument industry leader.
In the future, the pressure transmitter industry will become more and more sophisticated. Some brand enterprises will continue to improve the competitiveness of products, improve the service of supporting measures, accelerate the development of value-added products of transmitters, enrich the product series, and no longer only make a single product, increase the function extension of skill type, facilitate the daily use of customers, and drive the quality of technical standards of the whole industry With the rapid development of science and technology, the pressure transmitter has entered the development direction of science and technology.