Eltra Magnetostrictive Liquid Level Sensor

The Italian Eltra magnetostrictive liquid level sensor is a high-precision, ultra-long stroke absolute position measurement sensor manufactured by the principle of magnetostriction. The product is composed of pulse circuit, waveguide line, echo signal unit, structural parts and protective sleeve. It has the characteristics of high precision, reliability, long life, easy installation, and multiple output modes to choose from. It can not only measure The linear displacement of the moving object, and the analog signal of the displacement and speed of the moving object can be given. Due to the non-contact measurement method, the sensor has stable performance, long service life, and multiple output modes for selection. Therefore, it is widely used in petrochemical, food, water treatment, environmental protection, pesticides, papermaking, reservoirs, dyes, hydraulic machinery and other industrial equipment. 2. Working principle When measuring, the pulse generator generates a waveguide pulse, which is processed by the electronic part and transformed into a current pulse that propagates along the waveguide line, that is, the initial pulse. The magnetic field generated by it and the magnetic field formed by the magnetic ring are superimposed to produce instantaneous torque. , The waveguide wire is twisted and a tension pulse is generated. This pulse is transmitted back along the waveguide wire at a fixed speed, and the induced current pulse is generated at both ends of the coil, that is, the termination pulse. The time difference between the initial pulse and the termination pulse can be measured Accurately measure liquid level or displacement.

The principle of the Italian Eltra magnetostrictive liquid level sensor: the change of the magnetization direction in the ferromagnetic substance will cause the change of the medium lattice spacing, so that the length and volume of the ferromagnetic substance will change, namely: magnetostriction phenomenon , Also known as the Widman effect, and its inverse effect is the Villari effect. But not all ferromagnetic materials have application value, only some new materials with high magnetostrictive properties have practical application value.

　　The technical parameters of Italian Eltra eltra magnetostrictive liquid level sensor:

　　1. Measuring range: 50～3000mm (hard rod structure), more than 3000 mm (soft rod structure)

　　2, power supply voltage: +24VDC±10%

　　3. Output mode: 0～5VDC, 0～10VDC, 4～20mA

　　4. Load characteristics: 2 mA (0～10VDC/+24VDC), 600Ω (4～20mA/+24VDC)

　　5, linear error: ≤0.05%FS

　　6. ​​Working temperature: -40℃～85℃ (for measuring rod part), -20℃～80℃ (electronic part)

　　7, measuring rod material: Z7CN18.09, Z7CND17-12-2, P.P

　　 8. Connection form: tooth mouth type, steel cable type (customizable), flange type (customizable)

　　Italian Iltra eltra magnetostrictive liquid level sensor features:

　　 1. Easy to install

　　 2. Long service life

　　3. Isolation and explosion-proof

　　4. No need for regular re-standard and maintenance

　　 5. Lightning protection, radio frequency interference

　　6. ​​Multiple signal output mode selection

　　7. With reverse polarity protection

　　 8. Exquisite structure, strong environmental adaptability

　　 9. High precision, high stability, high reliability

　　10. Can monitor the liquid level of the pressurized or non-pressurized liquid tank

　　Italian Iltra eltra magnetostrictive liquid level sensor performance index:

　　 1. Resolution: better than 0.01% FS

　　2. Late lag: better than 0.01%FS

　　 3. Zero adjustment range: 20%FS

　　 4. Full scale adjustment range: 20%FS

　　 5. Frequency response time: 0.2~5ms

　　 6. Repeatability error: better than 0.01% FS

　　7. Temperature influence: ±0.007%FS/℃

　　 8. Non-linear error (±%FS): 0.05; the maximum error is 150μm below the range of 300mm.

The Italian Eltra magnetostrictive liquid level sensor uses the time when the strain pulse signal generated when two different magnetic fields intersect is detected to calculate the accurate position of the magnetic field intersection point. A magnetic field is excited by a pulse generated by the electronic component of the sensor’s electronic compartment. The magnetic field generated by the excitation pulse moves from the end of the electronic compartment to the end at the speed of light along the waveguide filament made of high magnetostrictive material in the sensor rod. When it intersects with the active permanent magnetic field (the permanent magnet is generally installed on the moving plate where the detection position is needed), due to the magnetostriction phenomenon, the waveguide wire generates a mechanical strain pulse at the intersection point, and from this point through the waveguide wire to the electron at the speed of sound The warehouse end transmits back, and the strain pulse is detected by the detection circuit in the electronic warehouse. Therefore, from transmitting an active pulse wave to receiving a strain pulse wave, the time between this is the time for the speed of sound to propagate in the waveguide wire (the active wave running time has been ignored here, and the actual impact is only 0.0001%). Knowing the speed of sound (the fixed amount is 3000m/s) and the transmission time, this distance is of course determined. When the permanent magnet moves to a new position, the above measurement is determined again. Therefore, the magnetostrictive displacement sensor has the advantages of high precision, high response, low hysteresis, high reliability, non-contact, long life, high stability, and easy installation. It does not need to be recalibrated, and does not require regular maintenance, so it is widely used in accurate measurement fields. use.