What is the purpose of the float level gauge, what is the difference between a magnetic float level

The equipment adopts the sensor core imported from abroad, converts the liquid level and pressure signal into the corresponding digital signal, and then outputs the RS485 two-wire standard signal through digital circuit processing. The all-in-one design encapsulates the isolated sensor and digital processing circuitry in the probe and outputs the 485 digital signal directly corresponding to the liquid level pressure via a special cable. 2. Application direction:

Open water tank, water tower water level; rivers, lakes, wells, dams, groundwater tables, etc.; urban water supply and sewage treatment; water conservancy construction, irrigation, drainage water level monitoring, etc.; the fuel tank level of diesel power generation equipment and hydropower equipment; Alcohol and other organic solvent levels. 3. Advantages and characteristics of the equipment: high-performance sensors, digital processing...

The water level gauge is suitable for long-term measurement of water level in reservoirs, rivers, lakes, dam body pressure measuring pipes, etc., and is an effective monitoring equipment for monitoring water level changes. The water level gauge adopts the magneto-optical coding principle for measurement, its measurement accuracy is high, the stability is good, there is no influence of temperature drift and time drift, and the signal can be connected to the MCU-32 distributed modular automatic measurement unit or directly connected to the computer to realize the automatic monitoring of water level changes.

The magnetic float level gauge (generally known as the magnetic flap level gauge) can be displayed on site and has the functions of switching output and 4-20mA output;

The float level gauge has a single float, a multi-float ball and a guide rod type, a single float and a multi-float ball are used for switch control, and a number of reed switches are installed in the guide rod with a guide rod, which can output multi-point and continuous signals, wherein the continuous signal is a number of reed switches installed at a medium distance from the guide rod (this distance is the resolution of the level gauge) and an equal number of equivalent resistances, which can output resistance signals and can also be converted into standard current signal output of 4-20mA by the transmitter.

It's just that the names of various manufacturers are different, and the principle is the same.

The magnetic float level gauge (also known as the magnetic flip level gauge) of Shenyang Shentuo automatic control equipment is a field display instrument, the principle is that when the float equipped with permanent magnet floats on the surface of the measured medium, with the change of the liquid level, the position of the magnet (that is, the actual liquid level position) changes, and the two-color magnetic flip column is driven to flip through the magnetization system coupling, so as to display the liquid level position. At the same time, it can output the liquid level from 4-20, and has the function of switch alarm, which can withstand high temperature and high pressure.

Shenyang Tektronix automatic instrument float level gauge is an instrument with remote transmission function, the principle is that in the sensor guide rod, a number of reed switches are installed at equal distances (this distance is the resolution of the level gauge) and an equal number of equivalent resistances. When the magnetic float floats to a certain position with the liquid surface, the reed switch at that position turns on the corresponding resistors (at least one to n) representing that position. The value of resistance at the output represents the level at that point.

Then the transmitter becomes a standard current signal output of 4-20mA. For display and adjustment of the gauge. The float level gauge can be used at a maximum temperature of 80 °C and a maximum pressure.

Although both are instruments for measuring liquid levels, their uses and functions are different.

The concepts are different, the principles are different, look it up on the Internet for yourself.

The working principle of the float level gauge: the float floats on the liquid surface according to the principle of discharging the liquid volume phase, etc., when the liquid level of the container changes, the float also moves up and down, changes the position of the liquid level into an electrical signal, and displays the actual position of the liquid with numbers through the display instrument, and the float level gauge achieves long-distance detection and control of the liquid level.

The reed transistor of the float level gauge is magnetically engaged, so that the resistance in the sensor changes linearly, and then the converter converts the change of resistance into a 4mA 20mA standard DC signal output to realize liquid level detection and control.

Fields of application. The float level gauge has the characteristics of simple structure, convenient debugging, good reliability and high precision. The float level gauge can be widely used for continuous measurement of liquid level (boundary) of high temperature, high pressure, viscous, dirty media, asphalt, wax-containing oils, and flammable, explosive, corrosive and other media.

The float level gauge can be used for industrial measurement and control of the liquid level of various liquid tanks such as petroleum, chemical raw material storage, technological process, biochemical, pharmaceutical, food and beverage, tank farm management and underground inventory of gas stations. Float level gauges are also suitable for dam water level, reservoir water level monitoring and sewage treatment, etc.

It is suitable for measuring the level and interface of the liquid medium in the container. In addition to on-site instructions, it can also be equipped with remote transmitters, alarm switches, and detection functions.

Principle. The pontoons immersed in the hidden liquid are subjected to a combination of downward gravity, upward buoyancy and spring spring. When these three forces reach equilibrium, the pontoon is stationary in a certain position.

When the liquid level changes, the buoyancy of the pontoon changes accordingly, and the equilibrium state is broken, which causes the elastic force to change, that is, the expansion and contraction of the spring, to achieve a new equilibrium. The expansion and contraction of the spring allows it to be rigidly connected to the magnet.

Displacements are generated. In this way, the liquid level is indicated by the magnetic sensing element and the actuator in the indicator. Limit switches.

The instrument can realize the alarm function of the liquid level signal.

Based on the displacement measurement principle, the displacement cylinder suspended from the measuring spring is immersed in the measured liquid and subjected to Archimedes.

The upward buoyancy force is proportional to the mass of the liquid discharged. According to the level of liquid, the immersion depth of the cylinder is different, the upward buoyancy changes, and the measuring spring will be extended accordingly to achieve the measurement result of the virtual carrying draft.

Advantages of pontoon level gauges

1. The measurement accuracy is poor and filial piety is high.

2. Intelligent: using HART communication protocol.

The meter provides the user with easy access to information about the operation of the process.

3. High sensitivity: it can respond to small changes in the process.

4. The torsion tube adopts an optimized heat treatment process.

It has excellent temperature and time stability.

5. The structure is sturdy and corrosion-resistant.

6. Wide range of applications and strong applicability.

The pontoon level gauge is a commonly used liquid level measuring instrument, and its working principle is to use the buoyancy of the pontoon and the gravity balance of the measured liquid to judge the liquid level. Specifically, a pontoon level gauge consists of a pontoon and a measuring rod. The pontoons are usually cylindrical, with a closed conical cavity in the upper part and a sealed cylindrical part in the lower part.

The measuring rod is fixed to the barrel wall of the level gauge and has a series of scales on the measuring rod to indicate the level height. When the liquid level rises, the pontoon will be buoyant and will float upward, so that the Xiangchun indicator on the measuring rod points to the corresponding liquid level height. Conversely, when the liquid level drops, the gravity of the pontoon will cause it to sink, and the indicator will point to a lower cavity scale position.

304 stainless steel. Because the magnetic float level gauge is placed in a closed system, the display part is completely isolated from the medium, providing a safe and reliable detection instrument for the level indication of flammable and explosive media and other industrial toxic and highly toxic media in petrochemical plants, the liquid level gauge can realize long-distance liquid level offside alarm and control, equipped with a signal transmitter, the liquid level can be converted into 4-20mA standard DC signal output, to achieve long-distance display, detection, recording and control, It is an ideal replacement for glass tube level gauge.

Precautions for the use of float level gauges.

When using the level gauge, pay special attention to it, and never use a strong magnet to pull the float up and down outside the connecting tube for inspection. Failure to do so will cause the magnetic float to magnetize and change its polarity, or even weaken the magnetism of the float, making it difficult to work normally.

When the magnetic flap level gauge is put into use on site, special attention should be paid to opening the upper gate valve first, and then opening the lower gate valve. This is due to the thrust spring installed at the bottom of the connecting tube of the level gauge to protect the float, otherwise, the action of large differential pressure may break the float and cause the level gauge to be unusable.

There are many kinds of floats for float level gauges, which come according to needs, and if it is a general medium, most of them are 304 stainless steel. If there is a corrosive medium, it is generally coated with PTFE or other plastic floats.

This is determined according to the requirements of Party A, the materials used in different environments are different, the general PP glue 304, 316L titanium, etc.

<> Magnetic Float Level Gauge Structure Principle The level gauge is developed according to the buoyancy principle and magnetic coupling. When the liquid level in the measured container rises, the magnetic float in the liquid level gauge body tube also rises and falls accordingly, and the permanent magnet in the float is transmitted to the magnetic turning column indicator by magnetic coupling, drives the red and white turning column to flip 180 °, when the liquid level rises, the turning column changes from judging reed white to red, when the liquid level falls, the turning column changes from red punch to white, and the red and white junction of the indicator is the actual height of the liquid level inside the container, thereby realizing the clear indication of liquid level. ZR-UZ side-mounted magnetic float level gauge installation, use and maintenance, magnetic flap level gauge installation, use and maintenance.

1.No magnetic conductive substances are allowed to approach around the body of the magnetic flap level gauge, and the iron wire is forbidden to fix, otherwise the normal operation of the magnetic flap level gauge will be affected; 2.If the user uses the heat trace pipeline, it must choose non-magnetic materials, such as copper pipes.

The heating temperature is determined according to the condition of the medium; 3.The installation of the magnetic flap level gauge must be vertical, and a ball valve should be installed between the magnetic flap level gauge and the container guide pipe to facilitate maintenance and cleaning; 4.The medium should not contain solid impurities or magnetic substances, so as not to cause jamming to the float; 5

Before use, the small balls below the zero position should be placed red with a correction magnet, and the other balls should be placed white; 6.Open the bottom flange and load the magnetic float (Note: the heavy end has a magnetic end pointing up, and cannot be reversed.)

The series of magnetic float level gauges and the measured container form a communicator to ensure that the liquid level between the measured container and the measuring tube is equal. When the float in the measuring tube of the level gauge changes with the measured liquid level, the magnetic body in the float acts with the magnetic body in the color scale displayed on the display bar to flip it, red indicates liquid, white indicates no liquid, so as to achieve the purpose of accurately displaying the liquid level on the spot.

Users can also use magnetron level gauge according to engineering needs, which can be displayed digitally on site, or output a standard telecommunication signal of 4 20mA to meet the needs of recording instruments or industrial process control. It can also be used with a magnetic control switch or proximity switch to monitor the liquid level and alarm or control the liquid inlet and outlet equipment.

The float level gauge is a liquid level measuring instrument that works using the variable buoyancy principle in the buoyancy principle (Archimedes' theorem).

In a gravitational field, the perpendicular upward force exerted on an object in a fluid due to the difference in density with the surrounding fluid is buoyant.

In a liquid, the buoyant force experienced by the object is equal to the weight of the liquid dislodged by the object. When the volume of an object immersed in the liquid changes, the buoyancy it experiences changes (variable buoyancy).

When a long float with an equal cross-sectional area is immersed in the liquid vertically, the buoyancy of the float changes linearly with the length of the float immersed in the liquid.

Of course it's different, these are two different level gauges.

This is the float level gauge.

The float level gauge is composed of a float, a rod, etc. The float level gauge is installed on the top of the container by connecting the flange, the float floats on the liquid surface according to the principle of discharging the liquid volume phase and so on, when the liquid level of the container changes, the float also moves up and down with it, due to the magnetic effect, the dry spring of the float level gauge is magnetically engaged, the liquid level position changes into an electrical signal, the actual position of the liquid is displayed by the display instrument with numbers, and the float level gauge achieves the long-distance detection and control of the liquid level.

This is the pontoon level gauge.

The float level gauge is a liquid level measuring instrument designed according to Archimedes' law and the principle of magnetic coupling, which can be used to measure the liquid level, boundary level and density, and is responsible for the output of upper and lower limit alarm signals. Designed to measure the liquid level in pressure vessels, it consists of four basic parts: a float, a spring, a magnetic chamber and an indicator.

The float immersed in the liquid is subjected to a combination of downward gravity, upward buoyancy and spring spring. When these three forces reach equilibrium, the pontoon is stationary in a certain position. When the liquid level changes, the buoyancy of the pontoon changes accordingly, and the equilibrium state is broken, which causes the elastic force to change, that is, the expansion and contraction of the spring, so as to achieve a new crack and delay balance.

The expansion and contraction of the spring causes it to displace the magnet that is rigidly attached. In this way, the dengao liquid level is indicated by the magnetic sensing element and the transmission device in the indicator.