- High precision, high stability, high reliability
- Long service life
- Multiple signal output mode selection
- With reverse polarity protection
- Anti-lightning, anti-radio frequency interference
- Exquisite structure, strong environmental adaptability
- No need for regular re-bid and maintenance
- Isolation explosion-proof type (optional)
- Easy to install
- Overview
The magnetostrictive sensor is developed by applying “magnetostrictive” technology. It is widely used in liquid level and displacement measurement systems that require high measurement accuracy and reliable measurement. It has the characteristics of high accuracy, high resolution, good repeatability, stability and reliability, non-contact measurement, long life, easy installation, and strong environmental adaptability. Its output signal is a true absolute position output, not a proportional signal or a signal that needs to be re-amplified, so there is no signal drift or value change, so it does not need to be re-calibrated and re-calibrated regularly like other liquid level and displacement sensors. Maintenance; it is precisely because its output signal is an absolute value, so even if the power is interrupted and reconnected, it will not cause a problem in data reception, and there is no need to reset to zero. It can be widely used in the measurement and control of the liquid level and mechanical displacement of various liquid tanks in petroleum, chemical, electric power, pharmaceutical, food, beverage, engineering machinery and other industries.
- Working principle
The working principle of the magnetostrictive liquid level and displacement sensor is shown in the picture. The product is mainly composed of a measuring rod, an electronic warehouse, and a non-contact floating ball or magnetic ring (with a magnet inside) that is sleeved on the measuring rod. A magnetostrictive tube (wave guide) is installed in the measuring rod, which is made of non-magnetic stainless steel tube, which reliably protects the wave guide. During operation, an initial pulse is generated by the electronic circuit in the electronic warehouse. When this initial pulse is transmitted in the waveguide, a rotating magnetic field that advances in the direction of the waveguide is generated at the same time. When this magnetic field meets the permanent magnetic field in the magnetic ring , Produces a magnetostrictive effect, which causes the waveguide to twist. This twist is sensed by the pickup mechanism installed in the electronic warehouse and converted into a corresponding current pulse. The electronic circuit calculates the time difference between the two pulses. , You can accurately measure the liquid level height or mechanical displacement of the measured medium.
3.Technical Parameters
Measuring range(mm): 80, 150,300, 500, 800, 1000, 1200, 1500, 2000, 2500, 2800,3000,3500, 4000, 4500, 5000 | |||
Output and supply Voltage | Analog type: 0～5V/+24VDC+10%、0～10V/+24VDC+10%、（-5～+5）V/+15VDC+10%、（-10～+10）V/+15VDC+10%或4-20mA/+24VDC+10%
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Digital type: RS485, SSI | |||
Working temperature: | T1：0～70℃ T2：-25～+80℃ T3：-40～+85℃ | Non-linear error (±%FS): | 0.05 |
Storage temperature: | -40～100℃
| Repeatability: | <0.01%FS |
Ripple: | <2mVrms(Low noise environment); < 6mVrms(80～1600mm); <10mVrms(80～1600mm); | Resolution: | <0.01%FS |
Hysteresis: | <0.01%FS | Temperature influence | +0.007% FS /℃ |
Zero adjustment range: | 20%FS | Full scale adjustment range: | ±10%FS |
Frequency response time: | 0.2～5ms | IP grade: | IP65 |
Material | 1Cr18Ni9（304）; 316L stainless steel or teflon option | Connection type: | Thread connection: M18×1.5; M20×1.5; 3/4-16UNF; Flange connection; |
Cable: | 2.8m PVC shield cable |
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4.Selection guide:
5.Dimension
Standard type:
Anti-Explosion type:
6.Installation
Installation method with accessories:
For sensors with a measuring range less than 1000mm, it is recommended to use L1 mounting accessories; for sensors greater than 1000mm, it is recommended to use L2
Install accessories.
①. Clamp the sensor with the sensor bracket, and fix the bracket on the thread of the sensor with a lock nut.
② Fix the split magnetic ring on the magnetic ring bracket with two lock washers #6 and two special screws M3×12. When the magnetic ring is installed on the measuring rod, the screw head should face the side of the hexagonal base; The ring should be as concentric with the measuring rod as possible without contact, but the magnetic ring is slightly
Eccentricity will not affect the performance of the sensor.
③. Tightly wrap the fixing plate around the end of the measuring rod and fix it with two M3×8 screws and two M3 nuts.
Note: L1 mounting assembly only provides a fixed slat, which is fixed within 50mm from the end of the measuring rod; L2 mounting
The module has three fixed slats, the installation method is: one fixed within about 25mm from the end, the other two
The roots are evenly distributed on the measuring rod.
Installation method without accessory components
①. For the installation method of the hydraulic cylinder as shown in the figure, screw the sensor into the M18×1.5 mounting hole, and pay attention to the tightness of the “O” ring
The cover should be processed as shown in the figure.
② According to the position of the magnetic ring, drill two or four M3 threaded holes on the self-made mounting plate, and use special screws for the magnetic ring
M3×12 and special gasket #6 are fixed.
③. Insert the magnetic ring and the mounting plate into the measuring rod, with the screw head facing the hexagonal base side of the sensor; the magnetic ring should be as concentric with the measuring rod as possible, but the magnetic ring is offset
The heart has no influence on the measurement accuracy. For sensors with a measuring range less than 500mm, they must be fixed within 50mm from the end to reduce vibration Impact.
7.Connection:
Analog output type:
Wiring notes:
- Standard mode means that the zero position of the signal output is on the side of the electronic warehouse, and the full output position is on the end of the measuring rod. When the line 3 is shorted with the 2nd line (the reverse switch is closed), the zero position is on the end of the measuring rod. The full output position is on the side of the electronic warehouse;
- The shielded cable of the sensor must avoid high-power power supplies, radio frequency signal sources and other noisy transmission lines, etc.;
- The shielded network cable of the cable must be kept intact and unbroken, and connected to the ground terminal of the subsequent equipment.
Digital output type:
Wiring notes:
- Standard mode means that the zero position of the signal output is on the side of the electronic warehouse, and the full output position is on the end of the measuring rod. When the line 3 is shorted with the 2nd line (the reverse switch is closed), the zero position is on the end of the measuring rod. The full output position is on the side of the electronic warehouse;
- The shielded cable of the sensor must avoid high-power power supplies, radio frequency signal sources and other noisy transmission lines, etc.;
- The shielded network cable of the cable must be kept intact and unbroken, and connected to the ground terminal of the subsequent equipment.
8.Application:
- Servo hydraulic cylinder piston position feedback or preset
- Detection and control of the opening of steam turbine air lock valve
- Servo cylinder piston position feedback or preset
- Detection and control of hydraulic turbine guide vane opening
- Position feedback or preset of grinding machinery
- Positioning and monitoring of injection molding machine template
- Displacement control of casting and forging machine tools
- Wood processing positioning control
- Other mechanical positioning and displacement detection
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