NYCZ Cable Type Magnetostrictive Liquid Level Meter Level
Transmitter
Magnetostrictive Liquid Level Meter
Magnetostrictive Liquid Level Meter Operating Principle
The principle of magnetostrictive level gauge is shown in figure.
The products mainly consist of measuring rod, electronic warehouse
and non-contact float on the measuring rod. The rod is equipped
with magnetostrictive wire (waveguide wire), which is made of
stainless steel tube without magnetic conductivity. It protects the
waveguide wire very well.
When the magnetostrictive liquid level meter is working, the pulse
generator in the electronic chamber sends out an initial pulse,
which, as it travels through the waveguide wire, produces a
rotating magnetic field moving along the waveguide wire. When the
magnetic field meets the permanent magnetic field in the float
sphere, a magnetostrictive effect is produced, resulting in a
constant velocity mechanical wave caused by the twisting of the
waveguide wire. The mechanical wave propagates in two directions,
and the mechanical wave at the end of the rod is absorbed by the
damper, and the mechanical wave that returns the direction of the
electron bunker is sensed by the pickup mechanism installed in the
electronic chamber and converted into the corresponding current
pulse. The pick up mechanism calculates the time between the two
pulses The height of the measured liquid level can be accurately
measured by the difference.
Magnetostrictive Liquid Level Meter Technical Parameter
| Applications | liquid level |
| Measurement range |
Probe: 0-50~6000mm Cable: 25m
|
| Accuracy | ±0.5mm |
| Power supply | 24VDC ±10% |
| Signal output | 4~20mA / Hart / RS485 |
| Working current | 4~20mA; 20.4mA |
| Load characteristics | when current output, maximum load resistance 600 Q voltage output,
maximum load Resistance 2mA |
| Process temperature | -40〜130 °C,-40〜250 °C |
| Ambient temperature | -40〜80°C |
| Temperature effect | ±0.5 °C |
| Process pressure | - 0.1 ~ 4.0MPa |
| Resolution | ±lmm |
| Response time | 0.2 ms |
| Rod material | 304/316L (optional) |
| Process connection | Thread, flange, Support mounting (optional) |
| Site display | LCD (optional) |
| Housing material | stainless steel / aluminum (optional) |
| Protection grade | IP67 |
| Explosion proof grade | Exia IICT6 (optional) |
※ Note: Products can be customized according to the specific requirements of users!
Magnetostrictive Liquid Level Meter Design Features
- More widely applicable, there are a variety of probe forms, a
variety of process connection fbrms,a variety of manufacturing
materials, customizable design.
- High reliability: because magnetostrictive liquid level gauge uses
waveguide principle, no mechanical movable part, so no friction, no
wear. The whole converter is enclosed in stainless steel tube and
is not in contact with the measuring medium. The sensor works
reliably and has a long life.
- High accuracy: because the magnetostrictive liquid level meter uses
waveguide pulses to determine the measured displacement by
measxiring the time between the initial pulse and the termination
pulse, the measurement accuracy is high and the resolution is
better than 0.01FS, This is an accuracy that is difficult to
achieve with other sensors.
- Good safety: the magnetostrictive liquid level meter has high
explosion-proof performance, intrinsically safe explosion-proof,
safe use, especially suitable for chemical raw materials and
flammable liquid measurement. It is not necessary to open the lid
of the tank to avoid the insecurity of manual measurement.
- The magnetostrictive liquid level gauge is easy to install and
maintain: the magnetostrictive liquid level meter is usually
installed through the existing nozzle on the top of the tank. It is
especially suitable for the installation of the underground storage
tank and the storage tank that has been put into service, and can
not affect normal production during the installation process.
Magnetostrictive Liquid Level Meter Installation Requirement
Magnetostrictive level gauge can be used in flammable, explosive
and corrosive liquid applications. The electronic chamber of the
magnetostrictive liquid level gauge is spattered but not submerged,
and the liquid must not be immersed above the hexagonal base. The
float ball has an installation direction and the NC-marked
hemisphere should be above the liquid level. The installation
method is as follows:
Method 1: according to the connecting flange above, the
installation hole is processed on the flange cover and directly
rotated into the magnetostrictive liquid level meter, as shown in
fig. 1;
Method 2: fixing magnetostrictive liquid level meter with sensor
support and locking nut, this method is suitable for liquid level
measurement of open tank, as shown in figure 2;
Method 3: machining a G2 thread hole on the cover of the tank fbr
convenience Place the float, as shown in figure 3;
Method 4: the length of the measuring rod can be adjusted according
to the height of the liquid level by using.
Magnetostrictive Liquid Level Meter Electrical Connection
the movable connecting head, as shown in figure 4
◎The output zero position of magnetostrictive liquid level meter is
one side at the end of the rod and the full range output position
is on the side of electronic warehouse.
◎The shielding line of transmitter must avoid high power supply, RF
signal source and other noisy transmission lines.
The cable shield must be kept intact and connected.
