SWP-T20X Series Differential Level Transmitter Mechanical Pressure Sensor

SWP-T20X series economical pressure transmitter Mechanical pressure sensor

Summary

Swp-t20x series economical pressure transmitter adopts imported ceramic piezoresistive sensor with international advanced level, cooperates with high-precision electronic components, and is assembled through strict process. The dry pressure measurement technology without intermediate liquid is adopted, which gives full play to the technical advantages of ceramic resistance sensor, so that swp-t20x series pressure transmitter has excellent technical performance. High stability and high measurement accuracy.

Swp-t20x series economical pressure transmitter has a variety of models, ranges and process connection forms. It can be widely used in many industrial fields such as petroleum, chemical industry, electric power, metallurgy, pharmacy, food, etc. it can adapt to various occasions and media of industrial measurement. It is an ideal upgrading product of traditional pressure gauge and traditional pressure transmitter, and an ideal pressure measuring instrument in the field of industrial automation.

Main features

◆ high stability, better than 0.1% of full scale every year.

◆ small temperature excursion because the intermediate liquid in the measuring element is eliminated, the sensor not only obtains high measurement accuracy, but also is less affected by temperature.

◆ good reliability large scale IC is adopted, with good circuit reliability and strong anti-interference performance.

◆ wide applicability the product has a variety of models, process connection forms and manufacturing materials, which can adapt to various media in industrial measurement.

◆ easy installation and maintenance. The product has reasonable structure, small volume and light weight. It can be installed directly at any position.

Working principle

The instrument changes the temperature signal into electrical signal through the temperature sensor, and then the preamplifier amplifies and filters the electrical signal, which is sent to the a/d conversion module of CPU for analog to digital conversion. Finally, the CPU performs data processing, display and PWM output. The principle block diagram is as follows:

The pressure of the measured medium directly acts on the ceramic diaphragm of the sensor, causing the diaphragm to produce a small displacement proportional to the medium pressure. Under normal working conditions, the maximum displacement of the diaphragm is not more than 0.025mm. After the electronic circuit detects this displacement, it converts this displacement into a standard industrial measurement signal corresponding to this pressure. In case of overpressure, the diaphragm is directly attached to the solid ceramic substrate. Since the gap between the diaphragm and the substrate is only 0.1mm, the maximum displacement of the diaphragm in case of overpressure can only be 0.1mm. Therefore, the structure ensures that the diaphragm will not produce excessive deformation. The sensor has good stability and high reliability.

Technical parameter

◆ accuracy level: 0.5

◆ return difference 0.1%fs

◆ temperature influence ± 0.1%/10 ℃

◆ working voltage DC 13V ~ 30V

◆ annual stability ± 0.2%

◆ signal output 4 ~ 20mA

◆ allowable overvoltage range 150%

◆ overall dimension 120 × sixty × 100 max

◆ maximum pressure range 200%

◆ allowable temperature medium -20 ~ 70 ℃ environment -20 ~ 80 ℃