Direct reading magnetic level gauge

GKYWG-57Direct reading magnetic level gauge

GKYWG-57 magnetic level gauge is a direct reading level instrument based on the principle of magnetic coupling, also known as a magnetic flip column level gauge or magnetic flip plate level gauge. Suitable for measuring liquid levels or boundaries in open or closed containers. According to Article 6.3.2 of the current "Design Specification for Tank Areas in Petrochemical Storage and Transportation Systems" SH/T3007, "a set of remote instruments and a set of local indicating instruments should be installed for measuring the liquid level of pressure storage tanks, and glass plate level gauges should not be used as local indicating instruments." Magnetic level gauges have replaced glass plate level gauges and become the ideal choice for local level indicating instruments.

Magnetic level gauge uses a magnetic float as the measuring element. When the liquid level in the storage tank changes, it will cause the float with magnetic steel to float along with the liquid level. The floating of the float linearly transmits the liquid level change to the magnetic flip column (plate) in the indicator through the principle of magnetic coupling. The magnetic flip column (plate) rotates 180 ° to change the indicator color, thereby achieving the purpose of indicating the liquid level in the storage tank.

Product Features

Reasonable structure, simple, and stable operation

The medium, indicator, and remote transmission unit are sealed and isolated, ensuring safety and reliability

Optional remote transmission device or liquid level switch

Optional damping device to avoid damaging the float during feeding or emptying

Can be used in hazardous areas such as corrosion, toxicity, flammability, and explosiveness

Large measurement range, not limited by container height pressure

Suitable for liquid level measurement and control in various industrial automation process controls

High voltage transparent window facilitates instrument debugging and maintenance

The product has a built-in surge protector with lightning protection and anti-interference functions

The weighing label can identify the position of the floating ball

GKYWG-57Direct reading magnetic level gauge Technical Specifications

Measurement range: Choose freely within the range of 150-6000mm. When it exceeds 6000mm, flange connection is used for the connecting section

Measurement accuracy: ± 10mm ± 5mm Medium density: ≥ 0.45g/cm ³ Medium temperature: ≤ 500 ℃ (customizable)

Pressure: ≤ 20MPa

Wetting material: 304 316L titanium alloy Hastelloy C lining PTFE can be customized

Flange standards: comply with current industry and national standards such as HG/T20592 and HG/T20615

Protection level: IP66 IP68 (glass tube indicator)

Electrical interface: NPT1/2 NPT3/4 (customizable)

Security level: SIL3

Process pressure: ≤ 1.6MPa ≤ 4.0MPa ≤ 20MPa

Remote transmission unit

Remote transmission devices include two forms: magneto resistive remote transmission devices and magnetostrictive remote transmission devices.

Magnetic resistance type remote transmission device: Its remote transmission unit is tied to the outside of the measuring cylinder. When the liquid level in the storage tank changes, it will cause the float with permanent magnet steel to float along with the liquid level. The float floating causes the magnetic resistor corresponding to the liquid level value to close under the action of the float's magnetic field, resulting in changes in resistance and current. The 4-20mA signal is output through an analog-to-digital conversion circuit, thus achieving the purpose of remote transmission of liquid level signals. When applied in explosion-proof situations, the magnetoresistance type remote transmission device should use an explosion-proof shell.

Magnetostrictive remote transmission device: Its remote transmission unit is tied to the outside of the measuring cylinder, and the remote transmission unit emits current pulses along the magnetostrictive lines inside the measuring tube to form a circular magnetic field. When the liquid level in the storage tank changes, it will cause the float with permanent magnet steel to float along with the liquid level. The magnetic field of the float magnetizes the magnetostrictive wire along the axial direction.

A twisted pulse is generated at the superposition of two magnetic fields. The remote transmission unit detects the transmission time of the pulse and processes it through a processor to output a 4-20mA signal through an analog-to-digital conversion circuit, thereby achieving the purpose of remote transmission of liquid level signals. When applied in explosion-proof situations, magnetostrictive remote transmission devices should use explosion-proof shells.

Magnetoresistance type remote transmission device

Power supply: 24DCV

Output signal: 4-20mA/HART RS485 MODBUS protocol

Load impedance: 500 Ω (when powered by 24DCV)

Measurement accuracy: ± 10mm ± 5mm Electrical interface: M20 × 1.5 (F) or according to user requirements

Protection level: IP66 IP68

防爆形式： ExdIICT6 Gb ExiaIICT6 Ga

Environmental temperature: -40 to+80 ℃

Magnetostrictive remote transmission device

Power supply: 24DCV

Output signal: 4-20mA/HART RS485 MODBUS protocol

Load impedance: 500 Ω (when powered by 24DCV)

Measurement accuracy: ± 1mm Electrical interface: M20 × 1.5 NPT1/2 NPT3/4

Protection level: IP66 IP68

防爆形式： ExdIICT6 Gb ExiaIICT6 Ga

Environmental temperature: -40 to+80 ℃

level switch

Contact capacity: 220ACV 3A

Output format: SPST

Electrical lifespan: ≥ 100000 cycles

Electrical interface: M20 × 1.5 NPT1/2 NPT3/4

Protection level: IP66 IP68

Explosion proof grade: ExdIICT6 Gb ExiaICIT6 Ga

Environmental temperature: -40 to+80 ℃