1.6mpa, the service temperature is 0℃ ~ 200℃, the medium fluidity is good liquid.Although its structure is simple, easy to operate, easy to maintain, low price, but there is a narrow scope of application, afraid of breaking, not strong, unsafe, not withstand pressure, display is not clear, low temperature use weakness.

(1) Glass plate level meter: mainly used in transparent or relatively transparent medium, its nominal pressure is slightly higher than the glass tube level meter, can reach 6.3MPa, the upper limit of the use temperature reaches 250℃.It not only has the advantages of simple structure, intuitive observation, convenient installation and simple maintenance, but also is more widely applicable than glass tube level meter.However, it also has some disadvantages similar to the glass tube level meter, namely: poor indication definition;The measuring range is small, and the combined glass plate level meter should be used when the measuring range is exceeded.Easy to break, etc

(2) the magnetic liquid level gauge: often used in liquid density is not less than 0.45 g/cm3, mostly transparent and semi-transparent medium, but sometimes also can be used in high viscosity of crude oil and medium level of detection, its measuring range than the glass tube liquid level meter and glass liquid level meter big many, big can be up to 7 m, and the applicable nominal pressure reached 16 mpa, applicable temperature range reached - 40 ℃ ~ 300 ℃.Its advantage besides have reading intuition, structure is simple, installation is convenient, maintenance is convenient, still more than glass tube (or plate) liquid level gauge is corrosion-resistant, and explosion-proof, and because measuring range is big, can not be controlled by the height of storage tank, not easy to appear blind spot.However, it also has disadvantages. When solid impurities and magnetic impurities enter the cylinder of the liquid level meter, it will cause stuck resistance to the float and weaken the buoyancy. Therefore, the main pipe should be cleaned regularly to remove sediment impurities in the pipe.And the measurement effect of the mixed medium is not good.

(3) Color quartz tube level gauge: It is the replacement of glass tube (or plate) level gauge.Suitable for water, oil, acid and other media, especially for two kinds of mixed medium liquid level is not easy to distinguish, such as oil and water mixed liquid, and suitable for high viscosity medium such as heavy oil level detection.Its advantages include: clear display of gas and liquid phase, especially suitable for remote observation and night patrol;No blind area, good sealing performance, high temperature and pressure resistance, anti-viscosity, light quality, long life, etc.Disadvantages: small measurement range, not suitable for some high liquid level measurement.