Category Archives: Magnetostrictive

SI-100 Rigid Probe Magnetostrictive Level Transmitter | 0.2-6 m, ±0.1 mm

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SI-100 Rigid Probe Magnetostrictive Level Transmitter

Stainless probe, 0.2 to 6 m measuring range, ±0.1 mm accuracy, 4-20 mA / HART / Modbus, ATEX option. Built for atmospheric and pressurized tanks where you need a rigid stem instead of a flexible cable.

  • Range: 0.2-6 m rigid. Up to 23 m with flexible cable variant.
  • Accuracy: ±0.1 mm or 0.05 % of FS, whichever is greater.
  • Output: 4-20 mA + HART, RS-485 Modbus RTU, or 0-10 V.
  • Process: -40 to +125 °C standard, +200 °C with extension. PN16/PN40 flange or 1″ NPT.
  • Certifications: ATEX/IECEx Ex ia IIC T6 Ga (Zone 0 capable). IP67.
Request a Quote View Full Specs ↓

Why Engineers Spec the SI-100

Four reasons it gets picked over float, ultrasonic, or guided-wave radar in our daily quote requests.

±0.1 mm

Repeatable Accuracy

Better than float by ~50× and better than 4-20 mA radar by ~10× for tanks under 6 m.

No Drift

Time-of-Flight Reading

The torsional pulse on the waveguide does not drift with temperature, dielectric, or coating.

2 Outputs

4-20 mA HART + Modbus

Drops into a PLC analog input or a Modbus poll loop without buying a new transmitter.

ATEX Ex ia

Zone 0 Capable

Same body as the standard model; just add the safety barrier on the cabinet side.

Full Specification Sheet

What you will see on the line item of the quote. Download the PDF datasheet from the request form below.

ItemSI-100 StandardSI-100 Ex (ATEX/IECEx)
Probe typeRigid stainless rod, 316LRigid stainless rod, 316L
Measuring range0.2 m – 6 m0.2 m – 6 m
Resolution0.01 mm0.01 mm
Linearity±0.05 % FS or ±0.1 mm (greater)±0.05 % FS or ±0.1 mm (greater)
Repeatability±0.005 % FS±0.005 % FS
Output4-20 mA / HART / Modbus RTU / 0-10 V4-20 mA + HART (Ex ia) / RS-485 (Ex ia)
Power supply24 VDC ±10 %24 VDC via Ex ia barrier
Process temperature-40 to +125 °C (+200 °C with extension)-40 to +85 °C (T6) / -40 to +120 °C (T5)
Process pressure0 – 4 MPa (40 bar)0 – 4 MPa (40 bar)
Process connection1″ NPT / G1″ / DN50 PN16 / DN50 PN40 flangeSame as standard
Float (included)SUS304 ring float, 50 mm OD, ≥ 0.6 g/cm³SUS304 ring float with Ex cable gland
HousingAluminum die-cast, IP67Aluminum die-cast, IP67
Cable entryM20 × 1.5M20 × 1.5 with Ex cable gland
Hazardous areaSafe area onlyEx ia IIC T6…T4 Ga (Zone 0)
ApprovalsCE, RoHSCE, RoHS, ATEX, IECEx

How Magnetostriction Actually Measures Level

  1. The transmitter head fires a low-current interrogation pulse down a tensioned waveguide wire inside the rigid stem.
  2. A donut float wrapped around the stem carries a permanent magnet. Where the pulse meets the magnetic field, the wire twists slightly — that twist is a torsional pulse.
  3. The torsional pulse travels back up the waveguide at ~2,830 m/s. The transmitter clocks the round-trip time.
  4. Distance = ½ × travel time × wave speed. A 1 GHz timer gives 0.01 mm resolution.

Why it matters in the field: no capacitance plate to coat, no ultrasonic beam to scatter on foam, no microwave dielectric to fight. The pulse is mechanical and the trigger is magnetic, so dirty liquids, vapors, and dielectric changes do not affect the reading.

Where the SI-100 Fits (and Where It Doesn’t)

The rigid-stem version owns four common tank shapes. If your tank looks like one of these and the depth is under 6 metres, the SI-100 is a one-line BOM addition.

Ceiling / Suspended Tanks

Top-mount through a flange. Probe length picked to leave 50 mm dead zone at the bottom. Common in chemical dosing rooms.

Buried Fuel Tanks

Diesel, petrol, or AdBlue. 4-20 mA + HART output feeds station controllers. Choose Ex ia version for petrol.

Small Process Containers

Day tanks, mixing vessels, lube reservoirs. Short probe (300-800 mm) keeps the float stable in narrow geometry.

Agitated / Foaming Tanks

Use the external stilling-well variant. The float sits inside a side chamber so the agitator does not whip it around.

When NOT to spec the SI-100: tanks deeper than 6 m (use flexible-cable variant or guided-wave radar), liquids with floating crust or solid foam thicker than 20 mm, and any liquid with metallic suspended solids that could stick to the float.

Three Ways to Mount It

Tell us which one fits your tank when you request the quote and we will ship the right adapter pre-fitted.

1. Top Mount (Thread or Flange)

Default option. 1″ NPT, G1″, or DN50 PN16/PN40. Probe drops straight down through the tank top.

2. Positioning Ring

For tanks where you cannot drill a flange. A clamping ring holds the rigid stem at the top opening.

3. External Stilling Well

Side-mounted chamber connected by upper and lower process taps. Used for agitated, foamy, or coating liquids.

Sizing the Probe Length

The probe is cut to order. Get this wrong and you either lose dead-band at the top or pay for steel you do not need. Three numbers go on the quote:

  1. H1 — Top Dead Zone: 50 mm minimum from the flange face down to the highest reading point. Add the height of the top fitting (a DN50 flange eats 30-60 mm).
  2. H2 — Live Measuring Length: the distance you actually want to read. Make this the working range you care about, not the full tank height.
  3. H3 — Bottom Dead Zone: 50 mm fixed, set by where the float magnet sits on the end stop.

Total probe length = H1 + H2 + H3, rounded up to the nearest 50 mm. For a tank 1.2 m tall with full coverage, order a 1300 mm probe (50 + 1200 + 50).

Two real-world examples from quotes we shipped last quarter:

TankWorking Level NeededProbe OrderedOutput Wired To
2.5 m vertical day tank, diesel0 – 2.4 m2500 mm rigid, 4-20 mA HARTAllen-Bradley AI card
0.8 m mixing vessel, IPA0.1 – 0.7 m800 mm rigid, Modbus RTU, Ex iaSchneider M340 RS-485
4.2 m underground petrol tank0 – 4.0 m4200 mm rigid, 4-20 mA HART, Ex iaStation controller

Pricing and Lead Time

FOB Shanghai, EXW China for orders ≥ 5 units. Stock items ship in 5 working days; configured items 10-15 days.

ConfigurationProbe LengthUnit Price (USD, Qty 1-4)Lead Time
SI-100 Standard, 4-20 mA≤ 1.0 m$6805 days (stock)
SI-100 Standard, 4-20 mA + HART≤ 2.0 m$88010 days
SI-100 Standard, Modbus RTU≤ 3.0 m$1,15010 days
SI-100 Ex ia, 4-20 mA + HART≤ 6.0 m$1,65015 days
SI-100 with Stilling-Well ChamberConfigured$1,950 +15 days

Bulk pricing (10+ units) drops 12-18 % depending on configuration. Quote turnaround is the same business day for any spec listed above.

If the SI-100 Doesn’t Fit Your Tank

Three alternatives we ship for the cases the rigid SI-100 cannot cover:

Flexible-Cable Magnetostrictive →

For tanks 6-23 m deep. Cable instead of rigid stem. Same accuracy, easier shipping.

Magnetic-Flap Level Gauge →

When you need a visible local indicator (flap column) plus the 4-20 mA signal in one device.

SMT3151 Hydrostatic →

Cheaper for water and benign liquids if ±0.1 mm is overkill. Submersible or threaded.

Frequently Asked Questions

What’s the Longest Rigid Probe You Will Build?

6 metres. Beyond that the rigid stem is hard to ship and to install, so we switch you to the flexible-cable variant which goes to 23 m.

Will It Work With Diesel That Has Water at the Bottom?

Yes, with two floats. The dual-float SI-100 gives you total liquid level (top float on diesel) and water-interface level (lower float on the diesel/water boundary). Specify on the quote.

Can I Retrofit It Where a Guided-Wave Radar Used to Be?

If the existing flange is DN50 or 1″ NPT, yes — drop-in. The 4-20 mA + HART output keeps your DCS configuration unchanged.

Does the Float Density Matter?

Standard SUS304 ring float works for liquids ≥ 0.6 g/cm³. For lighter liquids (like LPG condensate at 0.55 g/cm³) we ship a low-density titanium or PTFE float. Tell us the SG when you request the quote.

Which Output Should I Order for a Siemens S7-1500 PLC?

4-20 mA + HART for the simplest path (S7-1500 has analog input cards). If you are already on Profibus or Profinet, take the Modbus RTU version and run it through a gateway.

How Is the SI-100 Calibrated Before Shipping?

Each unit is bench-tested with the actual ordered float against a precision linear stage. A two-point calibration certificate (4 mA at empty, 20 mA at full) is included in the box. Field calibration is rarely needed.

Get a Confirmed Quote and PDF Datasheet

Tell us tank height, liquid, mounting style, and your PLC, and we will come back with a unit price and the full PDF datasheet within one business day.

Request a Quote

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Magneto-strictive Hydraulic Cylinder Position Sensor

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Hydraulic Cylinder Position Sensor is Designed for use in compact hydraulic cylinders

Magnetostrictive cylinder position sensor is a compact linear displacement sensor. Sino-Inst supplies cylinder position sensors suited to hydraulic and pneumatic applications. Cylinder position sensor output signals include: analog, SSI, Canopen.

  • Designed for use in compact hydraulic cylinders;
  • Linear measurement, absolute position output;
  • Measuring range: 50mm～2500mm, customized according to customer needs
  • Humidity/dew point: 90% humidity, no frost
  • Output signal: current, voltage
  • Power supply voltage: 9-32Vdc
  • Temperature range: -40℃ ～ +105℃
  • Electrical protection: IP67
  • Pressure resistance: 35MPa (continuous)/70MPa (peak)
Magneto-strictive Hydraulic Cylinder Position Sensor
RFQ
More Magnetostrictive Level Measurement

Specifications of Hydraulic Cylinder Position Sensor

Input
Measurement dataLinear displacement
Measuring stroke50mm-2500mm, can be customized according to user needs
Number of measurementsOne
Output
Voltage0.5～4.5Vdc  Maximum load resistance of the controller: ≥10kΩ)
Electric current4～20mA, 20～4mA, 0～20mA, 20～0mA      (Minimum/large load 0/250 Ω)
Accuracy
Resolution±0.1mm（50～400mm） Range÷4096（＞400mm）
Nonlinearity±0.1mm（50～400mm）   0.02%（＞400mm）
Repeat accuracy±0.1mm
Update time2.0ms
Working condition
Magnetic ring speedAny
Operating temperature-40～105℃
Humidity/Dew point90% humidity, no condensation
Temperature Coefficient<30ppm/℃
Impact indexGB/T2423.5 100g (11ms)
Vibration indexGB/T2423.10 25g/10-2000HZ
Electrical protectionIP67
EMC testGB/T17626.2/3/4/6/8, grade 4/3/4/3/3, Class A, CE certification; ISO13766, ISO11452-2/4
Structure and materials
Electronic warehouseStainless steel 304
RodStainless steel 304
Magnetic ringVarious magnetic rings
Outer tube pressure350bar/700bar (peak value) when installed in the liquid cylinder
Installation
Installation directionAny direction
Installation formElectronic warehouse outer circle
Electrical connections
Outgoing wayStraight out cable or aviation plug
Input voltage9-32Vdc
Power consumption1W
Polarity protectionMaximum -30Vdc
Overpressure protection36Vdc max
Insulation resistance＞10MΩ
Dielectric strength500V

Features of Magnetostrictive Hydraulic Cylinder Position Sensor

  • Compact structure: suitable for occasions with strict requirements on the installation space of the electronic head. It has a large number of applications in construction machinery
  • Rugged and durable: fully enclosed design. Adapt to harsh environments. The highest IP68 protection level
  • Straight line measurement: absolute output. No need to return to zero. Multiple signal interfaces are optional
  • Small size and easy to use.
  • Standard signal output, maintenance-free
  • Never wear: continuous non-contact measurement
  • Strong anti-interference and anti-vibration capabilities
  • Low power consumption. Effectively reduce system heating
  • Full range adjustable: 100% adjustable zero and full range
  • High resolution: resolution up to 1um

Magnetostrictive Cylinder Position Sensor analog output method

The MH series Magnetostrictive Cylinder Position Sensor has a built-in 16-bit D/A converter. It can accurately convert the absolute position of the vernier magnetic ring into a standard 4-20mA current signal or other signals in real time. The output signal has a linear relationship with the effective range. The zero point, full scale and positive and negative directions can be set by a screwdriver 100% according to the needs of on-site use. The output standard analog signal can be directly output to the PLC control module (such as Siemens 331 module) or other instruments.

Magnetostrictive Hydraulic Cylinder Position Sensor installation dimensions

MH series Magnetostrictive Cylinder Position Sensor, all built-in compact products. The size of the electronic head is only 48mm (diameter) × 21mm (thickness). It is suitable for built-in measurement occasions that have strict requirements on the installation space of the electronic head. Compact structure and strong anti-interference ability. It can be widely used in construction machinery, walking machinery, power machinery and other occasions. And it can be replaced with the same type of linear displacement sensor abroad.

Extended reading: Hydraulic oil flow measurement solutions.

Magnetostrictive Cylinder Position Sensor installation

MH series pressure-resistant outer tube, stainless steel electronic warehouse, specially designed for the use of hydraulic systems. Built into the hydraulic cylinder. Withstand pressure up to 35MPa continuous (70MPa peak).

Installation Notes:
To install the sensor housing, M5 DIN913 grub screws are required. The sensor can only be fixed in the direction of the axis. Since the screw can only contact the housing, the maximum torque to the screw can only be 1Nm. Otherwise the sensor housing will be damaged. And you need to remove the glue (such as Loctite Blue) to apply and seal the installed fixing sleeve screws.

Installation Precautions:

  • Cut off all sensor connections during welding!
  • Do not connect the ground terminal to the piston rod or the bottom of the cylinder.
  • If there are sensors inside the cylinder block, do not weld any part of the cylinder block.
  • If there are sensors inside the cylinder, do not weld near the cylinder.
  • Any place in contact with the welding machine may generate current or voltage. This is caused by the lubrication of the isolation bearing or the sliding part of the plastic part. In this case, the same consequences may be caused.

You may like: How does a hydraulic flow meter work?

The cylinder position sensor is mainly used to detect the position of the piston in the cylinder, and the user can directly install it in the cylinder. As a detection device, the sensor is the primary link to realize automatic control and automatic detection and can meet the various requirements of users for equipment information transmission, processing, storage, recording, display, and control.

The position sensor can be used to detect the position. A switch that reflects a certain state. Unlike the displacement sensor, the position sensor has two types: a contact type and proximity type.

The contact of the contact sensor is actuated by two objects contacting and squeezing. Common ones are travel switch, two-dimensional matrix position sensor, and so on. The travel switch has a simple structure, reliable action, and low price. When an object touches the travel switch during its movement, its internal contacts will act to complete the control. If travel switches are installed at both ends of the X, Y, and Z-axis of the machining center, the movement can be controlled. range. The two-dimensional matrix position sensor is installed on the inner side of the manipulator’s palm to detect the contact position between itself and an object.

A proximity switch refers to a switch that can send out an “action” signal when an object is close to a set distance, and it does not need to be in direct contact with the object. There are many types of proximity switches, mainly electromagnetic type, photoelectric type, differential transformer type, eddy current type, capacitive type, reed switch, Hall type, etc. The application of proximity switches on CNC machine tools is mainly tool holder selection control, worktable stroke control, oil cylinder and cylinder piston stroke control, etc.

Extended reading: Magnetostrictive Hydraulic Cylinder Position Sensor

Rated Products:

LD series Rigid Probe Magnetostrictive Level Transmitter
LR series Integral flange Magnetostrictive level sensor
LT series Digital Display Magnetostrictive liquid level sensor
LP series Magnetostrictive Tank Level Indicator-PVDF/ PPH/ PTFE/ PFA/ PP

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FAQ

What is hydrostatic level transmitter?

Hydrostatic level transmitter is actually a type of pressure transmitter. Hydrostatic level transmitter is the application of pressure transmitter to liquid level measurement. The submersible Hydostatic pressure level transmitter is based on the principle that the measured liquid static pressure is proportional to the height of the liquid. Piezoresistive effect using diffused silicon or ceramic sensitive elements. Convert static pressure into electrical signal. After temperature compensation and linear correction. Convert to 4-20mADC standard current signal output. In order to achieve liquid level measurement.

What is magnetostrictive transducer?

Magnetostrictive liquid level transmitter is a kind of liquid level sensor. But it uses the principle of magnetostrictive operation internally. And combines modern electronic technology to measure the time value between pulse waves to achieve the purpose of accurately measuring the liquid level . The magnetostrictive liquid level meter works with waveguide pulses. During the work, the measured displacement is determined by measuring the time of the start pulse and the end pulse, so the measurement accuracy is high.

How do you measure pressure using a level transmitter?

Usually we measure the liquid level by measuring the pressure.
When the liquid level transmitter is put into a certain depth in the measured liquid, the pressure formula of the sensor facing the liquid surface is: Ρ = ρ.g.H + Po. In the formula:
P: the pressure on the liquid face of the transmitter
Ρ: measured liquid density
G: local gravity acceleration
Po: atmospheric pressure on the liquid surface
H: Depth of transmitter into liquid
At the same time, the pressure of the liquid is introduced into the positive pressure chamber of the sensor through the air-conducting stainless steel. Then connect the atmospheric pressure Po on the liquid surface to the negative pressure chamber of the sensor. To offset Po on the back of the sensor, the pressure measured by the sensor is: ρ.g.H. Obviously, by measuring the pressure P, the liquid level depth can be obtained.
Of course, if the liquid level is measured, the pressure value can also be converted.

Read more about: Common Types Of Heating Oil Tank Level Sensors

Sino-Inst offers over 10 Magnetostrictive Hydraulic Cylinder Position Sensors for measurement.

About 50% of these are liquid level meters, 40% is the tank level sensor. A wide variety of level meters options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Magnetostrictive Hydraulic Cylinder Position Sensor, located in China.

Hydraulic Cylinder Position Sensor 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.

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Magnetostrictive Level Transmitters

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Magnetostrictive Level Transmitters are level sensors for continuous level measurement. It is the best technology for monitoring and controlling liquid level interface.

Magnetostrictive Level Transmitters are used for continuous measurement of liquid level and interface. Magnetostrictive level measurement is currently the best liquid level measurement and control technology.Sino-Inst’s Magnetostrictive Level Transmitters can provide two independent outputs: interface; overall level. It can be applied when the difference in specific gravity drops to 0.02. Magnetostrictive Level Sensors Commonly used for the measurement of the oil-water interface. And others include acid tanks, propane containers, desalter and sewage tanks. Magnetostrictive Level Transmitters are composed of three parts: probe rod, circuit unit and magnetic float. The flexible cable type and the outer buoy type are derived from the basic model. And has a variety of communication modes 4~20mA, 0~5V, 0~10V, HART, RS-485 and so on.

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

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More Level Sensors

Featured Magnetostrictive Level Transmitters

Features of Magnetostrictive Level Transmitters

Magnetostrictive Level Transmitters are divided into three types: flexible probe type, hard probe type, and outer float isolation detection. The watch body contains two main parts: the electronic part and the sensing part. The advantages of Magnetostrictive Level Transmitters are:

  1. Strong reliability:
    Because the magnetostrictive liquid level gauge adopts the principle of waveguide, there is no mechanical movable part. Therefore, there is no friction and no wear. The entire converter is enclosed in a stainless steel tube and is not in contact with the measurement medium. The sensor works reliably and has a long life.
  2. High precision:
    Because the magnetostrictive liquid level gauge works with waveguide pulses. In the work, the measured displacement is determined by measuring the time of the start pulse and the end pulse. Therefore, the measurement accuracy is high and the resolution is better than 0.01%FS. The accuracy achieved.
  3. Good security:
    Magnetostrictive liquid level gauge has high explosion-proof performance. Intrinsically safe explosion-proof and safe to use. Especially suitable for the measurement of chemical raw materials and flammable liquids There is no need to open the tank lid during the measurement. Avoid the unsafeness of manual measurement.
  4. Easy to install and maintain:
    The magnetostrictive liquid level gauge is generally installed through the existing pipe opening on the top of the tank. It is especially suitable for the installation of underground storage tanks and storage tanks that have been put into operation. It can not affect normal production during the installation process.
  5. Facilitate system automation:
    The secondary instrument of the magnetostrictive liquid level gauge adopts the standard output signal. It is convenient for the computer to process the signal. It is easy to realize the network work and improve the automation degree of the entire measurement system.

Sensing part (ie probe rod):

The probe has a diameter of 5/8” and the end is sealed. The inside of the probe is hollow and equipped with precision magnetostrictive wires. In addition to the magnetostrictive wires, the probe can also hold up to 8 RTD The sensor is used to detect the temperature. The maximum length of the probe can be 23 meters, and the flexible cable structure is used above 6 meters.

Electronic part (ie controller):

The shell is made of aluminum alloy or 304 stainless steel. It is a double-chamber type (that is, the transmission part is separated from the wiring part). One of the chambers is a micro-processing module and a circuit board, and the micro-processing module has operation buttons. The other chamber is a binding post. There is a wire connected between the circuit board and the probe processing board. This wire should not be loosened without authorization from the manufacturer.

magnetostrictive level transmitter working principle

The magnetostrictive liquid level/boundary transmitter is designed using a physical phenomenon – the principle of magnetostriction. The specific working principle is as follows:

A fine magnetostrictive wire is installed in a non-magnetic sensing tube. A piezoelectric sensor is connected to one end of the magnetostrictive wire. The piezoelectric sensor sends 10 current pulse signals to the magnetostrictive wire every second. and time it.

The current pulse travels down the magnetostrictive wire. A circular magnetic field is generated that moves downward.

Magnetostrictive Level Sensor Operating Principle

The annular magnetic field interacts with the magnetic field of the magnetic float. A torsional stress wave is generated on the magnetostrictive line. This torsional stress wave travels from the float position up and down the magnetostrictive line at a known speed. Knowing The piezoelectric magnetic sensor receives this torsional stress wave signal.

The time interval between the initial current pulse wave and the return torsional stress wave can be known through the timing circuit. The position of the float can be determined according to the time interval. Since the float always floats on the liquid surface, the liquid level can be accurately determined s position.

Applicaitons of Magnetostrictive Level Transmitters

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

Extended Reading: Low Cost Float Level Sensor for Tank Liquid Volume Monitoring

magnetostrictive level transmitter advantages and disadvantages

When the sensor of the magnetostrictive liquid level transmitter works, the circuit part of the sensor will excite a pulse current on the waveguide wire. When the current propagates along the waveguide wire, a pulsed current magnetic field is generated around the waveguide wire.

Magnetostrictive level transmitter advantages:

  1. The magnetostrictive liquid level gauge is suitable for liquid level measurement of clean liquid level with high precision requirements. The precision reaches 1mm, and the product precision can reach 0.1mm.
  2. It can be used to measure the interface between two different liquids.
  3. The biggest advantage of magnetostriction lies in its extremely high resolution, which can be at the micron level. A typical application is to measure the position of a rolling mill load hydraulic cylinder. But the design here is not the same as level measurement. The position measurement of the hydraulic cylinder is not that the hydraulic oil drives the magnetic ring (ie, the floating ball). Instead, the movable part of the cylinder body drives the magnetic ring to move through the mechanical structure, so the position is very clear. Usually, the precision requirements of the rolling mill for the thickness of the sheet are usually several to tens of microns. Therefore, the resolution of the magnetostrictive sensor must reach the micron level.
  4. The explosion-proof intelligent electronic circuit design can calculate the volume
  5. The movable part of the magnetostrictive liquid level gauge is a float, and the maintenance is extremely low. It is used in liquid level measurement of various storage tanks and has the characteristics of strong environmental adaptability and convenient installation.

Compared with liquid level gauges such as radar, it has a very high cost performance and many functions in short-range measurement. The display screen has current, temperature and interface display. This is exactly why the magnetostrictive level gauge can become one of the most common products used on metering tanks such as gas stations today.

Disadvantages of magnetostrictive level transmitter:

  1. The anti-interference ability is slightly poor (generally it is not recommended to be used in places with strong electromagnetic radiation such as power plants).
  2. It must be a contact measurement, but the real measurement unit is not in contact with the liquid, and only its protection tube is in contact with the liquid.
  3. The medium is in direct contact, and the floating ball sealing requirements are strict, and the viscous medium cannot be measured.
  4. Installation is limited. Higher installation and maintenance requirements, so the market is not widely used.

Extended reading: How To Select Hydraulic Flow Meter?

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.

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.

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: Hydrostatic Submersible Level Transmitter-Straight Rod Insertion

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.

Frequently
Asked
Questions

Help Center

Magnetostrictive liquid level transmitter is a kind of liquid level sensor. But it uses the principle of magnetostrictive operation internally. And combines modern electronic technology to measure the time value between pulse waves to achieve the purpose of accurately measuring the liquid level . The magnetostrictive liquid level meter works with waveguide pulses. During the work, the measured displacement is determined by measuring the time of the start pulse and the end pulse, so the measurement accuracy is high.

1.The device electronics generates a low energy current pulse at fixed intervals.
2.The electrical pulses create a magnetic field which travels down a specialized wire inside the sensor tube.
3.The interaction of the magnetic field around the wire and the magnetic float causes a torsional stress wave to be induced in the wire. This torsion propagates along the wire at a known velocity, from the position of the magnetic float and toward both ends of the wire.
4.A patented sensing element placed in the transmitter assembly converts the received mechanical torsion into an electrical return pulse.
5.The microprocessor-based electronics measures the elapsed time between the start and return pulses (Time of Flight). And converts it into a position measure-ment which is proportional to the level of the float.

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.
Learn More

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.

Magnetostrictive probe technology provides underground storage tank and above ground storage tank owners a highly accurate device to measure and transmit water height, fluid height and temperature to a monitoring device. In addition, Veeder-Root probes support in-tank leak detection to assist in compliance management.

Related tank liquid level measurement solutions

Sino-Instrument offers over 10 Magnetostrictive level transmitters for level measurement. About 50% of these are Magnetostrictive liquid level meters, 40% is the tank level sensor.

A wide variety of Magnetostrictive level meters options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Magnetostrictive level measurement instrumentation, located in China.

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LP series Magnetostrictive Tank Level Indicator

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Tank Level Indicator is important for liquid level monitoring of industrial storage tanks. Magnetostrictive Tank Level Indicator is suitable for corrosive liquids. PVDF/ PPH/ PTFE/ PFA/ PP are optional.

Tank Level Indicator is based on the basic model of magnetostrictive level sensor, using corrosion-resistant materials. The shell structural parts are all made of anticorrosive materials such as PVDF/PPH. It is widely used in the media conditions of strong acid and alkali such as petrochemical industry and new energy. For fuel oil tank, explosion proof is optional.

Sino-Inst offers a variety of Magnetostrictive Tank Level Indicators for industrial level measurement. If you have any questions, please contact our sales engineers.

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Featured Tank Level Indicators

Rigid Probe Magnetostrictive Level Transmitter
Integral flange Magnetostrictive level sensor
Digital Display Magnetostrictive liquid level sensor
Multi-Point Liquid Level Float Switch
Magnetic Float Level Sensor-Reed Switch
Portable Ultrasonic Liquid Level Indicator
Hydrostatic level transmitter-Rod Type
Differential pressure(DP) level transmitter

Features of Magnetostrictive Tank Level Indicator

  • The shell is made of Teflon (Teflon) and other materials, resistant to strong acids and bases. Suitable for super corrosive environment.
  • The effective stroke is 0～20000mm, and the range can be customized.
  • There are voltage, current, analog/485 digital/can bus, and various signal output options.
  • Built-in imported waveguide wire as the measuring unit. After DSP digital signal processing. High precision, no temperature drift, no contact. Life span up to 20 years;
  • Strong adaptability to temperature environment; the pole can withstand high temperature 300C°.
  • Pressure resistance and corrosion resistance, float pressure 1.5MPa. It can be applied to most corrosive liquid level measurement applications such as strong acids and bases.
  • Protection grade IP68
  • Strong anti-interference ability
  • High precision
  • Low power consumption and high cost performance;
  • Easy to disassemble and install;
  • Non-contact measurement, high stability.
  • The absolute value displacement measurement is not affected by power failure;
  • Can replace LVDT, electronic ruler, encoder and other displacement sensors.

Specifications of Magnetostrictive Tank Level Indicator

Range (mm)50～2000mm or customized according to customer needs
Power supply voltage: +11VDC~+36VDC
Output form/working voltage: Analog signal: 4~20mADC, 0~5VDC, 1~5VDC, 0~10VDC (+15VDC~+36VDC) Digital signal: RS485
Load capacity: Voltage signal output load ≥1KΩ. Current signal output load ≤1KΩ
Non-linear error: ±0.05%FS; maximum error 100μm below 200mm
Repeatability error: better than 0.005%FS
Resolution: better than 0.005%FS
Hysteresis: better than 0.002%FS
Working temperature: 0~+70℃ -15~+60℃ -25~+70℃ -40~+85℃
Rod material: 0Cr18Ni9 (304) 316 stainless steel (special customization)
Electronic enclosure shell material: 0Cr18Ni9 (304) 316 stainless steel (special customization)
Lead way: PVC shielded cable. Default length: 1m, also available according to user requirements. Aviation plug (not applicable to explosion-proof products) terminal
Enclosure protection level: IP68

Tank level indicator float type

Float level sensor (float switch) is one type continuous level sensor for industrial level measurement. Float level sensor has a magnetic float that rises and falls as liquid level changes. The movement of the float creates a magnetic field. Through the magnetic coupling effect, the internal resistance of the sensor changes linearly. The resistance change is converted into a standard current signal of 4 ~ 20mA by an intelligent converter. The percentage of the liquid level, 4 ~ 20mA current and liquid level value, can be displayed on site. Applications like: water tank, fuel tank, level measurement and level control. Vertical, horizontal, and side mounted, all can be satisfied

Extended reading: Industrial Tank level indicators and Tank Level Gauges.

Large water tank level indicator

The water level sensor of your water tank is an essential component. If not repaired or replaced, a sensor can become damaged over time and fail entirely. Too much water can cause a malfunction and too little water means inadequate water pressure. Either way, repairing or replacing holding tanks is an expensive task you shouldn’t have to undertake because of sub-par sensors.
With Sino-Inst’s water tank level sensors, there’s nothing to break down or rust and our models have a 99% success rate!

In the high unlikely event that you experience any issues with your product, call us and we’ll replace or repair it immediately at no charge.

Read more about our water tank level sensors and control systems.

About Level Sensor Types and how they work, OMEGA Engineering has a good explanation. Video source: https://www.youtube.com/watch?v=bHxEXlIHSHY&feature=emb_logo

Propane tank level indicator

Propane, three-carbon alkane, chemical formula is C3H8, structural formula is CH3CH2CH3. Colorless, liquefied gas is slightly soluble in water, soluble in ethanol and ether Mixed with air to form explosive mixture. Exist in natural gas and petroleum pyrolysis gas. The chemical properties are stable, and chemical reactions are not easy to occur. Used as refrigerant, internal combustion engine fuel or organic synthetic raw materials.

A propane gauge shouldn’t be hard to pick, and it shouldn’t cost a lot of money. We know that, so we’re going to show you how to pick the best propane tank gauges.

See if there is stirring in the tank. If there is a mixer, then add a measuring tube on the side of the tank. Generally, the magnetic flap level gauge, float level gauge or magnetostrictive level gauge are commonly used.

It also depends on your working conditions, such as temperature and pressure to measure the density of the medium, and whether your spherical tank is supported.

The external measuring liquid level gauge is also called an externally attached ultrasonic liquid level gauge. Its working principle is ultrasonic echo ranging. That is, the ultrasonic wave is transmitted through the tank wall in the liquid medium and returned to the liquid level to be received by the sensor. Through its time difference To calculate the liquid level height, on-site OLED display.

At the same time realize the remote transmission of the monitoring liquid level and realize automatic control. Also suitable for liquid level measurement of liquefied gas, propylene, propane, ethane spherical tank.

💡 Industrial Propane Tank Level Indicators for Industrial Tank Level Measurement

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FAQ

What is magnetostrictive level transmitter?

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.

How does a magnetostrictive sensor work?

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.

What is flow and level sensor?

1. Flow sensor is a kind of detection instrument used to detect the flow parameters of liquid, gas and other media and convert it to other forms of signals for output. The flow sensor has many advantages such as small size, light weight, intuitive and clear reading, high reliability, and no pressure loss.
1. Level sensor is a sensor that can replace manual measurement. The liquid level sensor can convert the height of the liquid level into an electrical signal for output, so as to achieve the purpose of controlling the liquid level.

Read more about: Ultrasonic Tank Level Sensors for Tank Level Monitoring

Sino-Inst offers over 10 Tank Level Indicators for level measurement.

About 50% of these are Magnetostrictive liquid level sensors, 40% is the tank level sensor. 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 level measurement instrumentation, located in China.

Tank Level Indicator 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.

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LT series Digital Display Magnetostrictive liquid level sensor

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Magnetostrictive liquid level sensor can be used as a fuel tank level sensor. With LCD digital display. Perfect choice for Continuous Level measurement of the diesel tank/fuel tank.

Magnetostrictive liquid level sensor is a Digital display head type liquid level sensor. Specially designed for applications with on-site digital display requirements. Reliable measurement of continuous liquid level and interface are provided in tank level measurement. The LT Level sensors with a magnetostrictive measuring principle support 4-20mA, fieldbus output. Easy installation for storage tank, like Fuel storage tank (explosion proof ).

  • Digital display head, on-site display liquid level.
  • Support: Analog output, Modbus output (optional)
  • Explosion protection: Exd II B T5 (optional)

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

Need Level Indicator for CO2 tank? Learn more here.

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Features of Magnetostrictive liquid level sensor

The LT series digital display head type liquid level sensor is specially designed for the application with on-site digital display requirements. For large-range liquid level measurement (5-22 meters), a flexible measuring rod can be selected. This avoids the difficulties of installation and transportation caused by a large range.

The sensor can be installed on the top of the tank directly (threaded) or through the flange. The flange is equipped with a mounting position adjustment device. The sensor can be adjusted within a certain range.

The flexible measuring rod is equipped with a translucent anti-corrosion sheath on the outside to enhance the product’s resistance in corrosive environments. The product adopts flameproof enclosure (explosion-proof mark: Ex d II B T5). It has more advantages in the detection of liquid level in hazardous environment.

  • Built-in digital display head for easy observation of liquid level data;
  • Absolute output without regular calibration and maintenance;
  • Zero / full-scale point can be adjusted arbitrarily;
  • Low power consumption design, effectively reducing system temperature drift;
  • High precision, maximum 0.1mm level measurement accuracy;
  • Side outlet for easy installation;
  • Optional ultra-long range, up to 22m

Applications of Magnetostrictive liquid level sensor

  • Sensor for continuous level measurement of liquids in bypass level indicators
  • Chemical and petrochemical industries, offshore
  • Shipbuilding, machine building
  • Power generating equipment, power plants
  • Pharmaceutical, food, water treatment, environmental engineering industries
  • Simultaneous Measurement of Multiple Process Conditions:
    • -Product Level
    • -Interface Level
    • -Temperature
    • -Volume

Industries served:

  • Oil and Gas
  • Petrochemical
  • Chemical
  • Power Generation
  • Water and wastewater treatment
  • Pulp and Paper
  • Biotech
  • Marine  
  • Aerospace

Learn more about Diesel fuel tank level gauges & Indicators

TechSpecifications of LT series Magnetostrictive liquid level sensor

Item Parameters
Analog output Current: 4-20mA (minimum / maximum load: 0-500Ω)
Voltage: 0-10V (minimum load> 5KΩ)
Resolution: 16-bit D / A
Modbus Output signal: Modbus RTU
Output Transmission rate: 9600bps by default,
19200 / 4800bps optional
Resolution: 0.01mm
Measurement parameters
Hard measuring rod 100-5000mm
Flexible measuring rod 5000-22000mm
Non-linearity <± 0.05% of full scale F.S.
Repeatability <± 0.02% F.S. of full scale
Update frequency 10 Hz by default, frequency can be customized
Electrical characteristics
Outlet method Straight out of the cable
Input voltage 24VDC (-15 / + 20%)
Working current <60mA (varies with range)
Polarity protection-30VDC
Overpressure protection36VDC
Insulation capacity 500V (between signal ground and case)
Working conditions
Ambient temperature -40 ~ 85 ℃
Humidity / zero 90% humidity, no condensation
Humidity coefficient <50ppm / ℃
Protection class IP68
Explosion-proof ExdIIBT5
Installation & accessories
Installation method M18 * 1.5 thread, matching flange (optional)
Stylus structure Rigid / flexible rod, 304L stainless steel, optional Teflon coating
Electronic warehouse Anodized aluminum alloy
Float 304L stainless steel, optional Teflon coating

Extended reading: Types of Fuel-Diesel Level Sensors

Dimensions

Note 1: Different floats have different measurement blind spots at the first and last measurement ends. Please consult technical support before ordering.

Note 2: The outside diameter of the rod without temperature measurement is 10mm, and the outside diameter of the rod with temperature measurement is 12mm.

Magnetostrictive liquid level sensor Installation on Tank

LT series digital display head type liquid level sensor can provide two types of installation: rigid measuring rod and flexible measuring rod. The maximum range can reach 22 meters. There is a Teflon protective sleeve on the outside of the measuring rod. The sensor is mounted on the ceiling through the flange. The flange is equipped with an installation position adjustment device, which can adjust the range of the sensor within a certain range. There are measurement blind areas at the beginning and end of the sensor, which need to be considered during installation.
The sensor uses low-voltage DC power supply, which is more secure in the detection of dangerous goods storage.

Application of Magnetostrictive Liquid Level Senor in Storage Tank

Liquefied petroleum gas is one of the most widely used fuels in civil and industrial production. During the storage and transportation of liquefied petroleum gas, liquid level measurement is an important task of the project. It is required not only to have high accuracy for liquid level measurement. It must also be able to adapt well to the working conditions of closed pressure vessels. At the same time, in order to meet the needs of remote monitoring and management. It must also require the measurement data to have the function of long-distance transmission.

At present, the comparison of the common detection methods for the storage tank liquid level in the tank area is as follows:

Instrument nameAccuracyMeasuring principleLiquid level, interface, temperature measurementRegular maintenanceOn-site installationoverall costsService life
Magnetostrictive liquid level sensor0.5mmMagnetostrictionYes (integrated)Maintenance-freeSimpleLow20 years
Servo level sensor1mm
mechanical
Yes (split)
Regular maintenance
Complicated
High
short
Guided wave radar level senosr 1mm
RadarnoMaintenanceComplicatedHighLonger

Extended reading: Non contact level measurement

Advantages of stainless steel magnetostrictive liquid level sensor for oil level measurement:

  1. High precision: the magnetostrictive liquid level gauge uses waveguide pulse to work. During the work, the measured displacement is determined by measuring the time of the start pulse and the end pulse. Therefore, its measurement accuracy is high. The resolution is better than 0.01% FS. This is an accuracy that is difficult to achieve with other sensors.
  2. Good safety: the magnetostrictive liquid level gauge has high explosion-proof performance. Safer to use. Especially suitable for the measurement of chemical raw materials and flammable liquids. There is no need to open the tank lid during measurement, and there is no insecurity for manual measurement.
  3. Strong reliability: Because the magnetostrictive liquid level gauge uses the waveguide principle. There are no mechanical moving parts, so there is no friction and no wear. The entire converter is enclosed in a stainless steel tube and does not contact the measuring medium. The sensor works more reliably and has a longer life.
  4. Facilitate system automation: The secondary instrument of the magnetostrictive liquid level gauge adopts standard output signal. Help the computer to process the signal. It is easy to work on the Internet. Improve the automation of the entire measurement system.
  5. Simple installation and maintenance: the magnetostrictive liquid level gauge is usually installed through the existing nozzle on the tank top. It is especially suitable for the installation of underground storage tanks and already put into operation. And will not affect normal production during the installation process.

If you need to measure river water level, open channel level, etc. The Ultrasonic Liquid Level Sensor can be used for non-contact continuous level monitoring. Extended reading: Ultrasonic level transmitter for Hazardous Liquids

What is magnetostrictive level transmitter?

Magnetostrictive liquid level transmitter is a kind of liquid level sensor. But it uses the principle of magnetostrictive operation internally. And combines modern electronic technology to measure the time value between pulse waves to achieve the purpose of accurately measuring the liquid level . The magnetostrictive liquid level meter works with waveguide pulses. During the work, the measured displacement is determined by measuring the time of the start pulse and the end pulse, so the measurement accuracy is high.

How does a magnetostrictive sensor work?

  1. The device electronics generates a low energy current pulse at fixed intervals.
  2. The electrical pulses create a magnetic field which travels down a specialized wire inside the sensor tube.
  3. The interaction of the magnetic field around the wire and the magnetic float causes a torsional stress wave to be induced in the wire. This torsion propagates along the wire at a known velocity, from the position of the magnetic float and toward both ends of the wire.
  4. A patented sensing element placed in the transmitter assembly converts the received mechanical torsion into an electrical return pulse.
  5. The microprocessor-based electronics measures the elapsed time between the start and return pulses (Time of Flight). And converts it into a position measure-ment which is proportional to the level of the float.

Extended reading: Radar Level Sensor Working Principle

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.

Magnetostrictive liquid level sensor can measure liquid level or interface. However, it is not possible to perform on-off control of the liquid level. If you need to control the tank level, you can read Guide for Liquid level float switches.

FAQ

How does a level transmitter work?

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.
Learn More

How does a hydrostatic level sensor work?

When considering a new level sensor for level measurement applications,
it is often hard to find information on how the different types of level sensors,
like the hydrostatic level sensors respectively hydrostatic pressure sensors, are working.
Recently, I explained level measurement by using the hydrostatic pressure measurement.
In closed geometries, such as enclosed tanks and vessels,
generally, flush pressure sensors or pressure transmitters are used,
which can be screwed into the vessel from the outside.
Pressure sensors are therefore particularly suitable,
in applications of free-standing tanks and vessels.
A submersible pressure transducer
or a flush pressure sensor
measures the height-dependent weight-force of the liquid column,
also known as hydrostatic pressure.
This pressure measurement is directly proportional to the liquid level respectively liquid column,
at the measuring point of the pressure sensor.
It is, therefore, necessary, for the measurement of level,
that the pressure sensor is placed as close as possible to the level of the vessel’s bottom.
The measured hydrostatic pressure then directly corresponds to the height of the liquid column,
from the ground-level measurement point to the surface-level of the medium.
So, the filling height is calculated from the distance of the medium surface,
to the measuring point by the pressure measurement.
The weight force of the liquid column,
thus the hydrostatic pressure, however,
is not only directly proportional to the filling height
but also varies with the specific gravity of the medium and the force of gravity.
More
Extended reading: Hydrostatic Level Measurement

What is DP type level transmitter?

The liquid level (pressure/differential pressure) transmitter is a pressure signal,
measured at the reference side of atmospheric pressure (low pressure side), 
with one or two ports for flange (or other connection) and process pipe connection.
On the basis of common pressure/differential pressure transmitter,
one or two isolation membrane boxes, are added to measure the liquid receiving part.
Mainly used for measuring high temperature, easy to solidify or crystallize, 
containing solid suspended matter, too viscous, 
corrosive or other needs to maintain sanitary conditions, non-polluting media.
More

Read more about : Diesel Fuel Level Sensor Types

More Featured Level Senors

Magnetostrictive level sensor
Magnetostrictive Tank Level Transmitter
Submersible hydrostatic level transmitter
Hydrostatic Level Sensor
Differential pressure (DP) level transmitter
 Capacitance Level Transmitter
SI-80 Radar Level Sensors
ULT-100A Ultrasonic Level Transducer

Featured Continuous level sensors

SI-U01 Float Level Sensor
SI-U02 Multi-Point Liquid Level Float Switch
SI-U03 Float Switch Water Level Controller
SI-U04 Magnetic Float Level Sensor-Reed Switch

Sino-Instrument offers over 10 level transmitters for level measurement. About 50% of these are liquid level meters, 40% is the tank level sensor.

A wide variety of level meters options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of level measurement instrumentation, located in China.

Request a Quote

Please enable JavaScript in your browser to submit the form

LR series Integral flange Magnetostrictive level sensor

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The magnetostrictive level sensor comes with a mounting flange. Directly mounted on the tank flange with 4 M8 screws. Continuous Level measurement of the diesel tank/fuel tank.

The magnetostrictive level sensor is also called the Magnetostrictive level gauge, or Magnetostrictive level transmitter. The magnetostrictive level sensor is the best choice for water, diesel, and fuel tank level measurement. LR series Integral flange Magnetostrictive level sensor is flange integrated installation. The electronic compartment of the magnetostrictive level sensor comes with a mounting flange. The sensor can be directly mounted on the tank flange with 4 M8 screws. 4 ~ 20mA \ 0 ~ 10VDC \ RTU signal \ EIA-RS485 \ RS422 optional. The magnetostrictive level sensor can be intrinsically safe and explosion-proof. A magnetostrictive level sensor measures level just like guided wave radar/ultrasonic level detectors. With Longer life and better accuracy than Hydrostatic level transmitters.

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

CONTACT US
More Magnetostrictive Level Measurement

Features of Magnetostrictive level sensor

LR series integral flange type liquid level sensor. The electronic compartment has its own mounting flange. Compact structure and convenient installation. Suitable for occasions with compact installation space. Can be installed in any common liquid tank and metering equipment. The sensor can use 4 M8 screws Installed directly on the tank flange.

The sensor must be installed vertically, and the installation slope should be less than 5 degrees. There are a variety of liquid-level floats. The hemisphere marked by the float should be above the liquid surface, and there are dead zones at both ends of the measuring rod

After the sensor is installed on-site, you can set the start and endpoints of the upper and lower liquid level measurement according to the actual liquid level measurement needs through the handheld setting terminal.

Rigid Probe Magnetostrictive Level Transmitter

● Sturdy and reliable. Waterproof and antifouling;
● 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;
● Compact electronic warehouse. The installation height is as small as 35mm;
● Integrated flange-type electronic head. Can be directly installed at the mouth of the tank.

LR series Integral flange Magnetostrictive level sensor without local display. If you need a local display, please refer to SI-LT Magnetostrictive level transmitter with Local Digital Display

Specifications of LR series Integral flange Magnetostrictive level sensor

Optional interface
Optional interfaceAnalog-currentAnalog-voltageModbus
output signal4~20mA；0~20mA0~10V; 0~5V; -10V~10VRTU signal，EIA-RS485/RS422
General parameters
Installation methodFlange installation (4-M8), installation slope≤5 °
Measuring range50mm ~ 3000mm
Measurement parametersNon-linearity ＜ ± 0.05 ％ F.S., Repeat accuracy ＜ ± 0.002 ％ F.S.
Protection abilityStraight cable: IP68, aviation plug: IP65
Operating temperature-40 ℃ ～ + 85 ℃
Operating Voltage24VDC (-15 / + 20%)
Optional floatThe minimum diameter of the float is 17.5mm, the maximum pressure is 2.5Mpa, and the minimum density is 0.45

Extended reading: Diesel Tank Level Monitoring System

The dimension of Integral flange Magnetostrictive level sensor

Applications of Integral flange Magnetostrictive level sensor

  1. Robust stainless steel fully sealed structure
  2. Absolute position output
  3. Non-contact measurement, permanent wear-proof
  4. Low consumption design ensures low-temperature drift of the system

Learn more about Diesel fuel tank level gauges & Indicators

Installations of LR series Integral flange Magnetostrictive level sensor

For other installation methods of Magnetostrictive level sensor, please refer to the figure below.

Installations of Magnetostrictive level sensor
Installations of Magnetostrictive level sensor

Wiring Information

Wiring Information

Magnetostrictive level sensor design

A magnetostrictive level sensor is composed of stainless steel (measuring rod), magnetostrictive wire (sensitive element-waveguide wire), movable float (with permanent magnet inside), and other parts. With the HART protocol, the zero point and range can be adjusted remotely. Various parameters can also be adjusted through the three buttons in the cabinet and the LCD. Configurable parameters include unit, display upper and lower limits, damping, translation correction, calibration upper and lower limits, digital and analog fine-tuning correction, and factory reset.

Extended reading: level sensors for fuel tanks

What is magnetostrictive sensor?

Magnetostrictive Level Transmitters

The magnetostrictive sensor is a high-precision, ultra-long stroke absolute position measurement sensor. It is manufactured using the principle of magnetostriction. The magnetostrictive sensor is non-contact and never wears out. High resolution, high precision. High stability, high reliability, fast response time, and long working life. The level sensor with the principle of magnetostriction and high-resolution measurement is used for continuous level measurement. And the position of the magnetic float is determined based on the principle of magnetostriction measurement.

Special features

  • Continuous level measurement on the outside of the bypass
  • 2-wire technology 4 … 20 mA
  • Measured value output via digital interface and a selectable measured value as analogue signal
  • Case from stainless steel (display from glass)
  • Magnetostrictive level measuring instrument with high resolution

Applications

  • Sensor for continuous level measurement of liquids in bypass level indicators
  • Chemical and petrochemical industries, offshore
  • Shipbuilding, machine building
  • Power generating equipment, power plants
  • Pharmaceutical, food, water treatment, environmental engineering industries.

Extended Reading: Guide and Selection for Diesel Fuel Flow Meters

How does A Magnetostrictive Sensor work?

  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.
How does Magnetostrictive Sensor work

Read more about: How to Choose the Right Diesel Fuel Level Sensor ?

More Level Senors for Tank Level Measurement

A tank level sensor is a level sensor used to measure the tank level. The liquid level is the level of the liquid in a sealed container (such as a water tank) or an open container (water tank). The instrument that measures the liquid level is called a liquid level sensor, a liquid level gauge, or a liquid level transmitter. The liquid level sensor is a kind of level instrument. Hydrostatic, Ultrasonic, Magnetostrictive, Radar, Differential Pressure are common choices for tank level measurement. Liquid level sensors have been around for decades for leak detection or level measurement. Commonly measured mediums are Water, Fuel, Diesel, Gasoline, diesel, liquefied gas, liquid ammonia, etc. More about Level Senors for Tank Level Measurement.

Radar level transmitter

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 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.

GWR level transmitter

Guided Wave Radar (GWR) Level Transmitters, also called wave guided radar level transmitters. Using guided wave radar technology, GWR level transmitters have no moving parts. They can measure both levels 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 into the transmitter housing determine the filling level.

Hydrostatic level transmitter

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

Ultrasonic level transmitter

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.

Extended reading: Diesel fuel tank level gauges & indicators

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Many people may confuse the float level sensor with the magnetostrictive level sensor. Because they look alike. But the actual working principle is different.

FAQ

How does a level transmitter work?

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.

What is radar level transmitter?

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.

How does capacitance level measurement work?

Capacitive level sensor is a device that converts the change of the measured object position into capacitance. Capacitance level gauge has simple structure, high resolution, reliable operation and fast dynamic response. It can be measured non-contact, and can work under harsh conditions such as high temperature, radiation and strong vibration. It has been applied in various fields of industrial and agricultural production. But traditional capacitive level meters all use analog circuits. Because the dielectric constant of the measured medium changes. Stray capacitive interference. Temperature drift. Influence of scraping and other factors. The application range of the traditional capacitive liquid level gauge is limited.

Sino-Instrument offers magnetostrictive level sensor products. About 21% of these are sensors.

A wide variety of magnetostrictive level sensor options are available to you, such as analog sensor, digital sensor. You can also choose from intrinsically safe and explosion-proof. There are over 12 magnetostrictive level sensors w can supply. Magnetostrictive level sensor products are most popular in North America, Eastern Asia, and Africa.

You can ensure product safety by selecting from certified suppliers, including with ISO9001 certification. Customers choose us because our products have the best price, the best Cost-effective, and the best service.

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