At the scene of the liquid level level of the industry, we can see all kinds of different measurement principle, structure and appearance of different liquid level measuring instrument, including magnetic liquid level meter, float level gauge, radar level gauge, turning into type level gauge, ultrasonic level meter, are more common type of liquid level meter, each kind of level gauge has the adaptive measurement conditions, in meet the working conditions of instrument measurement, can maximize the efficacy of liquid level measurement, and also be helpful for the service life of the instrument.
However, for so many instrument varieties, how to make the correct selection, so that every novice instrument users have a headache.The following is a brief analysis of the commonly used liquid level instruments in various places, hoping to help you.
A.Input level gauge
The advantages of the input level gauge are high measuring accuracy.Convenient equipment;Signals can be transmitted to remote control;Different materials can be selected to resist the corrosion of various media;Suitable for explosion-proof applications;The price is moderate.
B.Float level gauge
Floating ball level gauge is a method to measure liquid level based on buoyancy principle.Usually by means of a float and scale, the observer can visually read the height of the liquid level.
Strengths: fast, intuitive reading;Low prices;Simple equipment.
C.Magnetic flip gauge
Magnetic flip plate liquid level gauge is based on the magnetic float installed in the inside of the container and the magnetic flip plate outside of the flapper to complete signal transformation and liquid level display.
Strengths: fast, intuitive reading;Lower prices;Complete remote transmission and conditioning.
D.Capacitive level gauge
Capacitive level gauge is used to measure the concave and convex liquid surface by changing the capacitance value between the two electrode plates.
Advantages: small size, simple remote transmission and conditioning;Suitable for corrosive and high pressure media.
E.Radar level gauge
The radar level gauge is the information that is reflected from the liquid surface by the microwave (electromagnetic wave with very short wavelength) declared by the exploration itself.
Advantages: can measure liquid level in pressure vessel, can ignore the influence of high temperature, high pressure, scale and condensate;High precision;No direct touch with medium;Corrosion resistance;Can be used in vacuum environment;Simple equipment.
F.Ultrasonic level gauge
Ultrasonic level gauge is the signal conversion of liquid/object level azimuth after ultrasonic wave reflected by the liquid surface declared by the exploration itself.
Advantages: no direct touch with medium;Corrosion resistance;High precision;Simple equipment.
The bubble method is to inflate into the medium through the bottom of the air source stabilizer.Only when the air pressure in the air supply system is balanced with the hydrostatic pressure at the bottom of the container will the gas enter the container from the trachea to form bubbles.The static pressure at the measuring point can be converted by measuring the pressure in the air supply system, and then the liquid level value can be obtained.
Advantages: corrosion resistance;High temperature media can be measured.