Selection of liquid level gauge used are: glass level gauge, level gauge glass, magnetic level gauge and colored quartz tube level gauge and so on. Below this level gauge the scope of several advantages and disadvantages to do a brief introduction: (1) level gauge glass: mainly used for transparent or more transparent medium, its nominal level gauge slightly higher than the glass, up to 6.3MPa, the highest temperature reached 250 ℃. It not only has a simple structure, observed intuitive, easy installation, simple maintenance, etc., and the level gauge the scope is broader than glass. But it also has drawbacks similar to the glass tube level gauge, namely: indicates poor resolution; small measuring range, the measurement range is exceeded to the use of modular glass level gauge, large volume, heavy, and there was observed blind; and so easy to break. (2) magnetic level gauge: commonly used in liquid density of not less than 0.45g / cm3, mostly transparent and translucent media, but sometimes can also be used to detect high viscosity crude oil and other liquid media, the measurement range than glass level gauge and level gauge glass is much larger, up to 7m maximum explosion magnetic level gauge and applicable reached 16MPa nominal magnetic level gauge, temperature range reached -40 ℃ ~ 300 ℃. In addition to the advantage of intuitive readings, simple structure, easy to install, easy to maintain, but also than the glass (or board) level gauge more resistant to corrosion, and the explosion, but also due to the large measurement range, from tank height restrictions, less prone to observation blind spots. But it also has drawbacks, in the cylinder has a level gauge and magnetic impurities into the solid impurities, the float will cause jamming and reduced buoyancy, and therefore the main duct should be cleaned regularly, remove inner tube deposits of impurities; and measuring the effect of mixed media not good. (3) color quartz tube level gauge: He is a glass tube (or board) level gauge replacement products. For water, oil, acids and other media, especially for difficult to distinguish between two kinds of mixed medium level magnetic level gauge prices, such as oil and water mixed liquids and apply liquid level detection and heavy high viscosity of the medium. Its advantages are: gas, liquid display clear magnetic level gauge manufacturers, especially for long-distance observation and patrol at night; no blind spots, good sealing performance, high temperature, high pressure, anti-sticky, light weight, long life and so on. Disadvantages are: small measuring range, does not apply to some high-level measurements. Magnetic float, float type level gauge is mainly composed of the body part, local indicators, as well as several parts on the remote transmitter, the lower level alarms. Magnetic float type level gauge tube and float through the body of the container is connected with the process level (or interface) moves up and down, from the magnet inside the float principle driven by magnetic coupling magnetic flap indicator, with red and blue (liquid Red air blue) clearly indicate the level or intuitive process industry position within the container. Magnetic level gauge manufacturers, Anshan magnetic level gauge, one hundred to one hundred technology provided by Changzhou Technology Limited. Changzhou Best Technology Limited (www.czbckj.com) strong, credible, in Changzhou, Jiangsu chemical instrumentation industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement will lead one hundred innovative ideas into technology and you hand into the brilliant, for a better future!