Two-wire Magnetostrictive Level Meter Features

The two-wire magnetostrictive level gauge produced by the company is a new generation of high-precision liquid level measurement level gauge developed using the magnetostrictive principle. It has the characteristics of high precision, high reliability, long life, high stability, compact structure, strong adaptability to the environment, easy installation and so on. Compared with other level liquid level gauges, it has obvious advantages. Can be widely used in petroleum, chemical, pharmaceutical, food and other tanks, tanks, tanks, liquid level monitoring, measurement and control. The product meets the requirements of GB3836.1-2000 "General requirements for electrical equipment for gas atmospheres Part 1" and GB3836.2-2000 "Part 2 flameproof type "d" for electrical equipment for gas atmospheres".

First, the working principle is as follows:

The structure of the magnetostrictive liquidometer is composed of stainless steel tube (rod), magnetostrictive wire (waveguide wire) and movable float (with permanent magnet inside). When the liquid level gauge is working, the circuit of the liquid level gauge Part of the pulsed current will be excited on the waveguide wire. When the current propagates along the waveguide wire, a pulsed current magnetic field will be generated around the waveguide wire. A float is arranged outside the liquid level measuring rod, and the float can move up and down along the change of the liquid level with the measuring rod. Inside the float there is a set of permanent magnetic rings. When the pulsed current magnetic field meets the magnetic field of the magnetic ring generated by the float, the magnetic field around the float changes so that a waveguide wire made of a magnetostrictive material generates a torsional wave pulse at the position where the float is located. This pulse is at a constant speed along the The wire was returned and detected by the detection agency. By measuring the time difference between the pulse current and the torsional wave, the position where the float is located, ie, the position of the liquid surface, can be precisely determined.

Third, the main performance characteristics of the product are as follows:

● Advanced principle, many functions, and a wide range of applications.

● High precision, high stability, high reliability, and high resolution.

● Non-contact measurement, long life.

● Low power consumption and high cost performance.

● Isolated explosion-proof or intrinsically safe.

● 4 ~ 20mA two-wire output method.

● Compact structure, strong environmental adaptability, anti-fouling, dust-proof and waterproof. (IP65)

● Easy installation and adjustment, easy maintenance.

● No periodic rebalancing and maintenance are required.

● The power supply voltage adapts to a wide range and has strong anti-interference ability.

● Real-time measurement.

● Reverse polarity protection.

● Lightning protection against RF interference.

 

Third, the main technical parameters of the product are as follows:

3.1 Power Supply: 12 to 24VDCC

3.2 Working temperature: -20   °C～+ 60°C;

3.3 The main technical performance indicators

3.3.1 Range of Measurement:   0.2m～16m;

3.3.2 output format: standard 4 ~ 20mA;

3.3.3 Response time: less than 2 seconds;

3.3.4 Resolution: ≤0.05%FS;

3.3.5 Nonlinearity: ≤0.05%FS;

3.3.6 Repeatability: ≤0.05% FS;

3.3.7 Hysteresis: ≤0.05%FS;

3.3.8 Output temperature drift: 50ppm/°C;

3.3.9 Insulation resistance: 50V, 50MΩ;

3.3.10 Explosion-proof grade: ExdIICT6 Gb;

 

3.4 Other parameters

3.4.1 Material: 0Cr18Ni9, 1Cr18Ni9Ti for rod material,

3.4.2 Lead mode: The lead mode is the connection terminal. The wiring instructions are as follows:

POWER+:+24V   POWER-:0V

3.4.3 Use of media: Suitable for water, oil, ethanol and other clean level measurement.

3.4.4 The rod is under pressure ≤ 3MPa.

3.4.5 Sealing: All sealing surfaces that come into contact with the medium shall be welded. Inspection shall not be carried out with 1.5 times the pressure of use. Welds and seals shall be used between the base and the cover of the electronics compartment, and the tail cover and the cover shall be welded and tested with a pressure of 0.4 MPa. leak.

3.4.6 Appearance: The appearance of the level gauge should meet the requirements of the drawings, and the signage should be clear and complete.

3.4.7 Connection form: M27×2 thread.

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