The two-wire magnetostrictive level sensor is a new generation of high-precision liquid level measurement sensor developed using the principle of magnetostriction. It has the characteristics of high precision, high reliability, long service life, high stability, exquisite structure, strong environmental adaptability, and easy installation. Compared with other liquid level sensors based on different principles, it has significant advantages. It can be widely used for liquid level monitoring, measurement, and control of various tanks, pools, and tanks in petroleum, chemical, pharmaceutical, food, and other industries.

1、working principle

The structure of the magnetostrictive level sensor consists of stainless steel tube (measuring rod), magnetostrictive wire (waveguide wire), movable float (with a long-lasting magnet inside), and other parts

When the sensor is working, the circuit part of the sensor will excite a pulse current on the waveguide wire. When this current propagates along the waveguide wire, a pulse current magnetic field will be generated around the waveguide wire. There is a float outside the sensor measuring rod, which can move up and down along the measuring rod with the change of liquid level. There is a set of long-lasting magnetic rings inside the float. When the pulse current magnetic field meets the magnetic ring magnetic field generated by the float, the magnetic field around the float changes, causing the waveguide wire made of magnetostrictive material to generate a torsional wave pulse at the position of the float. This pulse is transmitted back along the waveguide wire at a fixed speed and detected by the detection mechanism. The position of the float, i.e. the liquid level, can be determined accurately by measuring the time difference between the pulse current and the torsional wave.

2Main performance characteristics

Advanced principle, multiple functions, and wide application range.

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

Low power consumption and high cost performance ratio.

4-20mA two-wire output mode.

Exquisite structure, strong environmental adaptability, anti fouling, dustproof, and waterproof. （IP66）

Easy installation and debugging, convenient maintenance.

No need for regular re labeling and maintenance.

The power supply voltage has a wide range of adaptability and strong anti-interference ability.

Real time measurement, LCD display.

● It has reverse polarity protection function.

● Lightning protection and radio frequency interference prevention.

3Technical parameters

3.1 Power supply: 24VDC ± 2.4VDC

3.2 environmentTemperature: -40 ℃ to+70 ℃;

3.3 Medium temperature -40-110 ℃ (standard); High temperature optional

3.4 Range: Hard rod 0.2m to 5m; Soft cable<16m;

3.5 Output format: Standard two-wire system 4-20mA;

3.6 Response time:<1 second;

3.7 Repeatability: ≤ 0.05% FS;

3.8 Pressure range 64Kg; (High pressure optional)

3.9 Output temperature drift: 50ppm/℃;

3.10 Zero point full degree adjustable range: 100% F.S;

3.11 Insulation resistance: 50V, 50M Ω;

3.12 Dead Zone: Standard Dead Zone: Upper Dead Zone: 150mm, Lower Dead Zone: 50mm;

(Can be adjusted according to the diameter of the float and user requirements)

3.13 Probe Material: 316 Stainless Steel PTFE

3.14 Connection form: 3/4NPT (standard) flange or customized by the user.