What is a magnetic flap level gauge

The GCC-UHZ/158C series magnetic flap column liquid level gauge is a product introduced and developed by Anhui Chuchen Technology Co., Ltd. by absorbing similar foreign products and improving them for production. The series of products can achieve high sealing, leak prevention, and safe and reliable measurement of liquid level under high temperature, high pressure, high viscosity, and strong corrosive conditions. The entire measurement process has no blind spots, eye-catching display, intuitive reading, and a large measurement range. Equipped with liquid level alarm and control switch, it can realize upper and lower limit alarm and control of liquid level or boundary. Paired with LB type liquid level transmitter, it can convert liquid level and boundary signals into two-wire 4-20mADC standard signals, realizing remote detection, indication, recording, and control. The series of products are widely used for liquid level measurement and control in various industries such as power, petroleum, chemical, metallurgy, environmental protection, shipbuilding, construction, and food production processes.

Note: Anhui Chuchen Technology Co., Ltd. specializes in supplying a series of products such as magnetic flap level gauges. It is mainly committed to the research and production of standard calibration, temperature, pressure, level, flow and other instruments, and provides on-site solutions for automation control systems. To provide more efficient, energy-saving, and safe production services for enterprises in the fields of electricity, petroleum, metallurgy, chemical, environmental protection, and pharmaceuticals.

Magnetic flap level gauge is a mechanical level measuring instrument based on the principle of connected devices and magnetic coupling. It visualizes the liquid level by driving the external flap to change color through a magnetic float, and has both local indication and remote transmission functions. The following is a systematic analysis from the aspects of core principles, structural composition, technical characteristics, applicable scenarios, and limitations:

1、 Core working principle

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Principle of ConnectorThe instrument body is connected to the side wall of the container through a flange, formingU-shaped connected structure ensures that the liquid level inside the main body is always at the same level as the liquid level in the container.

Magnetic coupling transmission

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Float unit: Equipped with a built-in magnetic float (usually a stainless steel sealed structure), with a density slightly lower than the measured medium, it floats up and down with the rise and fall of the liquid level.

Flip board display: The float magnetic field drives the dual color magnetic flip column (red/white) in the external flip board box to flip, and the flip column at the liquid level displays red, clearly indicating the real-time liquid level height.

Remote transmission mechanism

‌By using a magnetic switch or magnetostrictive rod to convert the position of the float into4-20mA current signal or switch quantity, supporting remote monitoring and alarm.

2、 Core structure composition

3、 Core advantages and limitations

‌advantage‌

Intuitive and reliable: The mechanical flipper has no power dependence, clear red and white boundaries, and is suitable for explosion-proof, high temperature (-20 ℃~450 ℃), and high pressure (≤ 32MPa) environments.

Strong adaptability:

Corrosion resistance:PVC/PTFE lining material is suitable for strong corrosive media such as hydrofluoric acid;

Vacuum compatibility: Closed tank, vacuum tank liquid level monitoring.

Low cost and easy to maintain: priced at only half of the radar level gauge, with no complex circuits and a long cleaning cycle of 1415.

‌Limitations and Taboos‌

Media restrictions:

Prohibited for use in viscous, impurity containing, or easily crystallizable media (such as tar, mud), which may cause the float to become stuck‌；

Density difference<The interface measurement accuracy is low at 0.15g/cm ³.

Installation constraints:

Flange spacing>An intermediate support needs to be added for 4m to prevent pipeline deformation;

Vertical installation is required to avoid obstacles inside the mixer or container.

Accuracy defect: The error is about ± 10mm, which is lower than that of radar/ultrasonic instruments.

4、 Typical application scenarios

Industrial tank monitoring

Petrochemical industry: storage tanks (crude oil, acidic and alkaline solutions)‌；

Energy and electricity: boiler steam drum, desulfurization tower liquid level (under high temperature and high pressure conditions).2. Special working conditions

Underground storage tank:UPVC material is resistant to groundwater corrosion;

Closed system: liquefied gas storage tank, vacuum reactor.

5、 Selection and installation points

Density matching: The float density needs to be accurately calculated, as being too light can result in false high/non-zero values.

Material selection:

corrosive medium→ PVC/PTFE lining;

Food and Medicine→ 316L stainless steel.

Installation specifications:

Avoid turbulent zones at the feed inlet;

Installing waveguide tubes to prevent interference in high steam environments.

6、 Compared to other liquid level gauges

Note: In flammable, explosive, highly corrosive, and high-precision scenarios (such as sewage tanks and solvent storage tanks), magnetic flip plates are still a cost-effective option