Working principle of magnetic level gauge

Magnetic liquid level gauge is the product that our factory introduces and absorbs similar foreign products, absorbs, digests, improves, and produces according to the standard HG / T21584-95 of the magnetic liquid level gauge issued by the former Ministry of Chemical Industry. It can be used to detect the medium level of equipment such as dry towers, tanks, tanks, spherical vessels and boilers. This series of magnetic liquid level gauges can achieve high sealing, anti-leakage, and are suitable for liquid level measurement of high pressure, high temperature, and corrosive media. They are reliable in use and have good safety. The lack of fragility is not affected by high and low temperature sharp bends, and does not require the combination of multiple level gauges. There is no blind area in the whole process measurement, the display is eye-catching, the reading is intuitive, the measurement range is large, especially the on-site indicator part, because it does not directly contact with the liquid medium, it is more obvious for high temperature, high pressure and high concentration, toxic, harmful, strong corrosive media Its superiority. Therefore, it has higher reliability, safety, precedence and practicality than traditional glass tubes and plate level gauges.
The most significant feature of the magnetic liquid level gauge is that the liquid medium is completely isolated from the indicator, so it is very safe, reliable and durable in any case, and various types of liquid level gauges are equipped with liquid level alarms and control switches to achieve liquid Alarm or control or interlock of the upper and lower limit of the position or boundary, equipped with static pressure liquid level transmitter or reed-resistance liquid level transmitter, can convert the liquid level and boundary signal into two-wire system 4-20mADC standard signal, realize remote indication, detection, recording and control. This series of side-mounted magnetic liquid level gauges can be widely used for liquid level measurement and control in the production process of various industries such as power, petroleum, chemical industry, metallurgy, environmental protection, shipbuilding, construction and food.

Features
1. Suitable for the measurement of the liquid level and boundary of the liquid medium in the container. In addition to on-site instructions, it can also be equipped with remote transmitters, alarm switches, and control switches, with complete detection functions.
2. Novel indication, intuitive reading, eye-catching, the direction of observation indicator can be changed according to user needs.
3. The measuring range is large, not limited by the height of the storage tank.
4. The indicator mechanism is completely isolated from the measured medium, so it has good sealing, high reliability and safe use.

5. Simple structure, easy installation and low maintenance cost.
6. Corrosion resistance, no power supply, explosion-proof.
Structural principle The liquid level gauge is developed based on the principle of buoyancy and magnetic coupling. When the liquid level in the measured container rises and falls, the float in the main conduit of the level gauge also rises and falls. The permanent magnetic steel in the float is transmitted to the on-site indicator through magnetic coupling, driving the red and white turning columns to turn 180 ° When the liquids rise, the turning column changes from white to red. When the liquid level drops, the turning column changes from red to white. The red and white boundaries of the indicator are the actual height of the medium liquid level in the container, so as to realize the liquid level indication .
Comparison table of liquid medium density and sink barrel distance (PN1 .6-40.MPa)

Liquid medium density
(G / cm3)

Shen Jian distance
(mm)

Examples of typical liquid media

0.45-0.60

320-380

Liquefied petroleum gas, liquid ammonia, ethylene, hydrocyanic acid, ethane

0.61-0.74

260-320

Gasoline, butadiene

0.75-0.85

230-260

Methanol, epoxy (propane), dimethyl stupid, light oil, ethyl

0.86-0.99

200-230

Acetone, ammonia, crude, beer, heavy wine, tallow, ethene

1.00-1.10

180-200

Water, acetic acid, camphor oil

1.11-1.25

160-180

Hydrochloric acid, tar, chlorosulfonic acid, nitrobenzene, FR-22

1.26-1.39

140-160

Liquid alkali, maltose, 20% dilute sulfuric acid, dimethyl sulfate

1.40-1.59

120-140

Liquid chlorine, dilute sulfuric acid, concentrated nitric acid, FR-12, chloroform

1.60-2.00

100-120

98% sulfuric acid, fuming sulfuric acid, perchloric acid, bromophosphoric acid, fluorine oil