LD series Rigid Probe Magnetostrictive Level Transmitter

Magnetostrictive level transmitter also known as Magtech LTM Level Transmitter. The magnetostrictive level transmitter realizes continuous liquid level measurement of the tank.

LD series Rigid Probe Magnetostrictive Level Transmitter

Magtech magnetic level indicator is Emerson’s name for magnetostrictive liquid level transmitter. Magnetostrictive liquid level gauge can perform continuous liquid level and interface measurement. The magtech magnetic level indicator uses magnetostrictive technology to measure the liquid level. The measured value is then transmitted back to the control system.
LD series magnetostrictive level sensor adopts hard measuring rod. Can be used with a variety of floats. With the flange, the liquid level sensor is installed in any liquid tank, filling and metering machinery.

Sino-Inst offers a variety of magnetostrictive level transmitters for industrial level measurement. If you have any questions, please contact our sales engineers.

Features of LD series Magnetostrictive Level Transmitter

LD series rigid rod-type liquid level sensor is sturdy and reliable. It is easy to install and does not need daily maintenance and calibration. Stainless steel measuring rods and floats are not affected by the physical and chemical properties of the liquid medium.

No matter the liquid medium has steam, foaming, condensation, foam, boiling, corrosion. Or there is special conductivity, dielectric constant, pressure And vacuum environment. The sensor can be unaffected, accurate, real-time transmission of level signals over long distances. Under special circumstances, Teflon coating can be applied externally.

The sensor can be installed directly or through flange in any common liquid tank and metering equipment. Double float measurement is available. One float measurement liquid / liquid interface and one float measurement liquid / vapor interface.

● Sturdy and reliable. Waterproof and stain resistant;
● Absolute output. No need for regular calibration and maintenance;
● Zero point / full scale point can be adjusted arbitrarily;
● Low power consumption design. Effectively reduce the system temperature drift;
● High precision. The highest 0.1mm liquid level measurement accuracy;
● Side outlet. Easy to install;
● Built-in terminal inside. Support field wiring;
● Support liquid level / interface double float level measurement.

Specifications of LD series Magnetostrictive Level Transmitter

Product name LD series liquid level sensor
Measuring range100mm ~ 5000mm or customized according to customer needs
Humidity dew point90% humidity, no frost
Output signalAnalog output, Modbus output
Resolution16-bit D / A or minimum 0.01mm
Temperature Coefficient<< 50ppm / ℃
Electrical protectionIP68
Operating temperature-40 ℃ ~ + 85 ℃
Number of floats1: liquid level or 2: interface
Outgoing wayStraight cable, side cable
Input voltage24VDC (-15 / + 20%)
Installation methodThread M18 * 1.5, matching flange (optional)
Rod structureRigid rod. 304L stainless steel, optional PTFE coating
Electronic warehouseAnodized aluminum alloy
Float304L stainless steel, optional PTFE coating
Explosion-proofExdIIBT5, please consult technical support for details.

Applications of LD series Magnetostrictive Level Transmitter

Industries served:Applications:
Oil and GasPosition Sensing
PetrochemicalSanitary Service
ChemicalValve Positioning
Power GenerationInventory Control
Water and wastewater treatmentCorrosive Process
Pulp and PaperUnderground Tanks
BiotechPrimary Level/Interface
Marine  Process Temperature and Level

LMT Series Magnetostrictive Level Transmitter – Applications

Video source: https://www.youtube.com/watch?v=GTZNuJ9u1dI

What is magnetostrictive level transmitter?

Magnetostrictive Level Sensor

Magnetostriction means that the change of the magnetization direction in ferromagnetic substance will cause the change of the medium lattice spacing. As a result, the length and volume of the ferromagnetic substance change.

Magnetostrictive level transmitter is a level transmitter based on the principle of magnetostriction. It is a high-precision, high-resolution transmitter driven by a magnetic float.

Magnetostrictive Level Transmitter working principle

Magnetostrictive Level Sensor Operating Principle
  1. When the sensor of the magnetostrictive level transmitter works, the circuit part of the sensor will excite a pulse current on the waveguide wire.
  2. When this current propagates along the waveguide wire, a pulsed current magnetic field is generated around the waveguide wire.
  3. There is a float outside the sensor rod of the magnetostrictive liquid level gauge. This float can move up and down along the rod with the change of liquid level.
  4. Inside the float there is a set of permanent magnetic rings. When the pulsed current magnetic field and the magnetic ring magnetic field generated by the float want to meet. The magnetic field around the float changes so that the waveguide wire made of magnetostrictive material generates a torsional wave pulse at the position of the float.
  5. This pulse is transmitted back along the waveguide wire at a fixed speed and detected by the detection mechanism.
  6. The position of the float, that is, the position of the liquid surface can be accurately determined by measuring the time difference between the pulse current and the torsional wave.
Pictures from the Internet

Technical advantages of magnetostrictive level transmitter:

-The magnetostrictive level transmitter is suitable for the level measurement of the clean liquid level required by high precision. The accuracy reaches 1mm. The accuracy of the latest products can already reach 0.1mm.

-Magnetostrictive liquid level gauge can also be used to measure the boundary between two different liquids.

-Explosion-proof design, suitable for dangerous occasions.

-Intelligent electronic circuit design can calculate the volume.

-The only moving part is the float, and the maintenance is extremely low.

You may like: Magnetic Float Level Sensor-Reed Switch

Float Level Sensor

Multi-Point Liquid Level Float Switch

Magnetostrictive level transmitter installation

1. Thread / flange installation:

As shown in the figure, the product should be installed vertically and the installation slope should not be greater than 5 degrees: when installing the float, the ON (upper) marked hemisphere should be above the liquid level:

The dead ends are measured at both ends of the measuring rod; the lower end and the bottom end of the rod should be flush when the locking ring is fixed.

This method is suitable for most liquid tank measurements. You can use the manufacturer’s connection flange or user-specified flange to screw the liquid level sensor mounting thread directly into the flange.

2. Use the active connector to install:

The sensor rod contacts the bottom of the tank, and the sensor is fixed by the movable joint of the electronic warehouse. The probe can be arbitrarily slid up and down to change the insertion depth of the probe. The sensor electronic warehouse and the lead-out cable are in the oil tank.

Note: Please tighten the compression nut and perform a pressure test to ensure the stability of the movable joint.

3.  The positioning ring mounting:

The sensor rod contacts the bottom of the tank, and the positioning ring of the electronic compartment prevents the sensor from swinging. The sensor electronic compartment and the lead-out cable are in the oil tank.

Note: h = tank height H=h+ riser height

D=Φ100mm Standpipe height ≥300mm

4. External installation:

Magnetostrictive level transmitter price

The price of a magnetostrictive level transmitter is determined based on the measurement conditions. Sino-Instrument is a manufacturer of magnetostrictive level gauges. We offer magnetostrictive level gauges at the right price.

Selection considerations:   

1. The selection of the level gauge should be consistent with the environment of the media on the site. Including ambient temperature, pressure, vibration, shock, compatibility of structural materials and media, etc.   

2. When the temperature of the measured medium is high (100 ~ 200), it is recommended to choose a probe with an outer float type and use a side flange installation. When the temperature is higher (200 ~ 300), it is recommended to choose a probe with a side-bundled type with an outer float, and install it with a side flange.   

3. There are measurement dead zones at the upper and lower ends of the measuring rod of the magnetostrictive level gauge, which should be considered when selecting the range.   

4. The size of the stainless steel magnetic float commonly used for level gauges is Ф45 × 56 × Ф15, and flange connection of DN50 or above is required. For the liquid level gauge with thread connection, users need to install flange or bracket.

More Level Senors for Tank Level Measurement

Radar level transmitter, also called Radar level gauge. Non-contact Continuous level measurement in liquids and solids with free space radar sensors. Non-contacting radar, based on microwave technology, detects only surfaces that reflect energy. These transmitters work on the principle of a radar by using radio wave emissions. Mounted at the top of a tank filled with a liquid. The transmitter sends a radar signal into the liquid, and receives a reflection of the signal. The transmitters then analyze the current fill level of the tank based on the time taken by the transmitted signal to return.

Read more about: List of Radar Level Sensors

Hydrostatic level transmitters, also called submersible level transmitter, or pressure level transmitters. For Hydrostatic level measurement, Continuous level measurement in liquid applications with pressure sensors. These transmitters help in determining fluid level of a container. By measuring the pressure of resting body of the fluid within it.

Read more about: Static Pressure/Hydrostatic Pressure Transmitter

Guided Wave Radar (GWR) Level Transmitters, also called wave guided radar level transmitter. Using guided wave radar technology, GWR level transmittershave no moving parts. They can measure both level and the interface between two media. Continuous level measurement in liquids and solids with guided wave radar sensors. These transmitters work by sending a microwave pulse through a sensor cable or rod. The signal hits the surface of the liquid, and travels back to the sensor, and then to the transmitter housing. Based on the time taken by the signal to travel down the sensor and back up again. The electronics integrated in the transmitter housing determine the filling level.

Read more about: Level Measurement | Radar-Guided Wave Radar Level Meter

Ultrasonic Level Indicator, also called Ultrasonic level sensor, or ultrasonic level transmitter. In this type of transmitter, an ultrasonic transducer is mounted at, or near the top of a container containing liquid. The transducer sends out an ultrasonic pulse. The pulse hits the surface of the liquid, and gets reflected. The sensor then calculates the fill level based on the time between the transmitted and received signal.

Read more about: Ultrasonic Level Sensor for Diesel Tanks | 5~150cm,0-30m

More Featured Level Transmitters


The level of the liquid medium in the container is called the liquid level. And the instrument that measures the liquid level is called the liquid level transmitter. Level transmitter is a kind of level instrument. There are two types of level transmitterss, one is continuous and the other is point-off. The continuous level transmitter is a real-time monitor of the height of the liquid in the container. The point type, which generally takes two points, high and low, and outputs an alarm signal when the medium in the container reaches these two points.The types of liquid level transmitters is very wide. Specific include: magnetic flap liquid level gauge, tuning fork vibration type, differential pressure type, pressure type. Ultrasonic, magnetostrictive liquid level gauge, magnetic flap, radar and so on.
Levels of media such as: water, viscous fluids, and fuels, or dry media such as bulk solids and powders can be measured using the transmitter.
Level measurement transmitter are used in a myriad of applications that require level measurement within containers or tanks. These transmitters often find their application in material handling, food and beverage, power, chemical, and water treatment industries.

Radar level transmitter is a kind of liquid level transmitter which uses the principle of radar operation.
Radar Level Sensor also called radar level transmitter, are the indicating transmitter for liquid level.
Non-contact Continuous level measurement in liquids and solids with free space radar sensors.
RADAR (Radio Detection And Ranging) is a device which can detect the presence of faraway objects by obtaining a reflection of electromagnetic waves emitted from the device itself. Although invented much earlier, wide deployment of radar was done by Britain during the Second World War to detect oncoming German bombers.
Radar level measurement is a safe solution. Even under extreme process conditions (pressure, temperature) and vapors. Various antenna versions for every kind of radar applications are available.
In continuous non-contact level measurement with radar, the sensor sends microwave signals towards the medium from above. The surface of the medium reflects the signals back in the direction of the sensor. Using the received microwave signals, the sensor determines the distance to the product surface and calculates the level from it.

Ultrasonic sensors are sensors developed using the characteristics of ultrasound. Ultrasound is a mechanical wave with a vibration frequency higher than that of sound waves. It is caused by the vibration of the transducing wafer under the excitation of voltage. It has high frequency, short wavelength and small diffraction phenomenon.

In particular, it has good directivity, and can be ray and directional propagation. Ultrasound has a great ability to penetrate liquids and solids. Especially in the opaque solids of sunlight, it can penetrate a depth of tens of meters.

Ultrasonic waves encountering impurities or interfaces will produce significant reflections and form reflections. Doppler effect can be generated when touching moving objects. Therefore, ultrasonic testing is widely used in industrial, national defense, biomedical and other fields.

To use ultrasound as a means of detection, ultrasound must be generated and received. The device that accomplishes this function is an ultrasonic sensor. It is customarily called an ultrasound transducer, or ultrasound probe.

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Sino-Inst offers over 10 Magnetostrictive level transmitters for level measurement.

Magtech magnetic level indicator is an innovative product with high precision and high reliability. Its appearance solves the liquid level and interface measurement under extremely harsh working conditions.

Due to the use of magnetostrictive technology, the measurement process is not affected by changes in factors such as temperature, pressure, and dielectric constant. It has the characteristics of high precision, high stability, and maintenance-free. It avoids the defects of traditional electric floats, differential pressure transmitters, radars and other liquid level products in the field application. Therefore, it is widely used in high-precision measurement of various liquid levels and interfaces.

About 50% of these are used as oil level meters, 40% is the oil-water interface meter. A wide variety of level meters options are available to you, such as free samples, paid samples.

Sino-Instrument is a globally recognized supplier and manufacturer of Magtech magnetic level indicator instrumentation, located in China.

Magnetic Level Transmitter products are most popular in North America, Domestic Market, and South America. You can ensure product safety by selecting from certified suppliers, with ISO9001, and ISO14001 certification.

Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a Magnetic level transmitter, pressure sensor, or other equipment, please give us a call .

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About KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects. Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.