The magnetostrictive level gauge is applied to the information system of the refined oil storage tank oil depot. Real-time monitoring and measurement management of refined oil storage tanks.

Technical Support

1. Introduction

In order to grasp the operation information of the storage tank in real time and accurately. For example the level, density, pressure, temperature, volume, and quality of the storage medium in the storage tank. To ensure the safety of the storage tank, many oil storage tanks have been studied at home and abroad. Detection and measurement methods and devices. Such as static pressure method, liquid level meter, hybrid method, etc., designed to a variety of measurement technologies, such as pressure type, servo type, radar type, magnetostrictive type, float steel belt type, etc.

Due to many factors such as technology, economy, and use. The monitoring, measurement, and safety management of oil storage tanks in our oil depots mainly rely on manual rulers, manual measurements, and manual inspections. Its measurement accuracy, reliability, maintainability, and real-time performance are difficult to meet the development needs of oil depot informatization construction.

An oil tank level gauge based on magnetostrictive measurement technology has a simple structure and high measurement accuracy. It can measure liquid level, boundary level, multi-point temperature, and other advantages at the same time.

This year, it has been applied more and more in the monitoring and measurement of oil storage depots, such as Sinochem Nantong Oil Depot. Therefore, the magnetostrictive level gauge is applied to the information system of the product oil storage tank oil depot. Real-time monitoring and metering management of refined oil storage tanks. Not only can real-time collection, storage, and management of oil depot receiving, sending, and storing information. It can also reduce staff to increase efficiency and improve oil depot management.

2. Working principle of the magnetostrictive level gauge

2.1 The composition of the magnetostrictive level gauge

The magnetostrictive level gauge is mainly composed of a float (with a magnetic ring inside), a transmitter (or an electronic warehouse is composed of a pulse generator and a receiver), a waveguide equipped with a magnetostrictive wire and a temperature detector. . The transmitter (electronic warehouse) is equipped with a magnetostrictive wire waveguide and temperature detector are integrated structure. The transmitter and temperature detector adopt a modular and integrated design.

2.2 Working process of the magnetostrictive level gauge

The working principle of the magnetostrictive level gauge is mainly to use the combination of magnetic effect and super-generating effect to achieve the purpose of measurement. Magnetic effect and Weidmann effect and Villari effect.

When the transmitter is powered on, the pulse generator and receiver start to work. The pulse generator in the electronic head of the level gauge first applies an electrical pulse signal to the magnetostrictive waveguide wire. This electrical pulse is accompanied by a circular magnetic field. When the magnetic field encounters the longitudinal magnetic field generated by the magnet in the float at the speed of light. It will be vectorially superimposed to form a spiral magnetic field.

According to the Weidmann effect, when the magnetic field of the magnetostrictive material changes. The weak size of the magnetostrictive material itself will also change accordingly. Therefore, when the synthetic magnetic field changes to form a spiral magnetic field, the magnetostrictive waveguide wire will be twisted and deformed. This excites the torsional wave (or return pulse).

The torsion wave will be transmitted back to the induction coil in the sensor head in the form of ultrasonic waves along the waveguide wire and will change. When the coil in the sensor, it will be converted into transverse stress.

According to the Villari effect, when a magnetostrictive material is physically deformed. Will cause changes in the magnetic field strength in the magnetostrictive material. Therefore, the magnetic flux passing through the sensor coil will change, and an induced electromotive force that can be detected will be generated at both ends of the sensor coil. The propagation speed of the supergenerated torsion wave is only related to the elastic modulus and density of the magnetostrictive waveguide filament, which is a constant.

Therefore, the time difference from the moment the current pulse is emitted to the detection of the induced electromotive force is multiplied by this fixed velocity V. The position of the magnet (float) can be accurately calculated. Its liquid level height L=V*(t1-t2).

Extended reading: Fuel-Diesel-Water Tank Level Sensor Monitoring

2.3 Technical characteristics of the magnetostrictive level gauge

The petrochemical industry has gradually paid attention to the monitoring of oil levels. According to the working principle, it can be roughly divided into the following types:

• Mechanical float level gauge. The price is low, but its accuracy is low, and it cannot meet the requirements for use as a measuring instrument. And the failure rate is high, and the steel belt is prone to jam.
• Capacitive liquid level gauge. The price is moderate and the measurement accuracy is acceptable. However, due to its large temperature drift, its stability is insufficient, the accumulated error is large, and the measured value is not accurate.
• Light guide type liquid level gauge. The price is moderate, but the measurement accuracy is low and the stability is poor.
• Radar level gauge. The price is expensive, the liquid level accuracy, reliability, and stability are all ideal, the installation is also very convenient, and different media are practical.
• Magnetostrictive liquid level gauge. The price is more expensive, the stability is better, and it is easy to install. But it cannot be used in heavy oil with high viscosity and high density. Of course, the magnetostrictive level gauge has many other outstanding advantages. Specifically in:

① The work is very reliable. Because the second son telescopic level gauge uses the waveguide principle to work. Therefore, there are no mechanical moving parts inside the device, and there are no defects such as wear. The entire converter is enclosed in a stainless steel tube. No contact with the measured medium. Therefore, the sensor works reliably and has a long life span.

②Multi-parameter measurement. Another major feature of the magnetostrictive level gauge is that it integrates measurement of liquid level, water interface, temperature and other parameters. Because the electronic components in the magnetostrictive level gauge can detect the continuous magnetic waves generated by the same emission pulse. Therefore, two or more magnetic floats can be installed on the same sensor. Just ensure that the weight of the float corresponds to the specific gravity of the medium. The liquid level and interface can be measured at the same time, realizing multi-parameter measurement.

③High measurement accuracy. Because the magnetostrictive level gauge uses waveguide pulses to achieve measurement. During work, the displacement of the measured liquid surface is measured by the time difference between the excitation pulse and the induction pulse. Therefore, the accuracy is extremely high, which is a measurement accuracy that is difficult to achieve with other sensors. At roughly the same or lower cost, magnetostrictive level gauges have higher accuracy and better economic benefits than other measuring systems that use capacitance, pressure, mechanical, ultrasonic or servo devices.

④ Good safety performance. The explosion-proof grades of magnetostrictive level gauges are generally flameproof and intrinsically safe. Suitable for working in various flammable, explosive, high temperature, high pressure and other dangerous places. No need to manually open the filling cap during measurement. Avoid the hidden danger of insecurity caused by manual measurement.

⑤ Easy to install and maintain. Since the magnetostrictive level gauge adopts flange connection, the installation is extremely simple. Moreover, the core components are not in contact with the medium, and the product has a modular structure. Intelligent design, no need for regular maintenance and regular calibration, which brings great convenience to users.

⑥Easy to realize networking. The output of the magnetostrictive level gauge is a standard signal. It is convenient for crisis management and can better cooperate with computer. It is also easy to make long-distance transportation possible.

Of course, the change of medium density will have a certain impact on the accuracy of the magnetostrictive level gauge. But it can be installed by installing a suitable float. Reduce the immersion of the float, reduce the outer diameter of the float, and overcome and avoid it to the greatest extent through temperature compensation. After on-site testing, the magnetostrictive level gauge is the same as the radar level gauge, with blind spots and inaccurate measurement of tank bottom oil.

Extended reading: Radar Oil Tank Level Sensor

3. Application of magnetostrictive level gauge in Sinochem Zhuhai Phase II product oil tank

At present, Sinochem Zhuhai Phase II Chenpin Oil Depot with a total of 412,000 m3 has been completed. Among them, the online liquid level monitoring system involving 12 light product oil tanks totaling 192,000 m3 uses magnetostrictive level gauges. The liquid level system consists of a magnetostrictive liquid level gauge, H-500 field display, H-1000 (oil depot) 10.4 inch color touch screen controller and YSMK-YK oil depot information monitoring and management system.

This system can display liquid level, interface height and temperature with H-500 on-site display in the field. In the control room, the H-1000 (oil depot) controller is used to display data in real-time with three-dimensional graphics and digital methods. Use sound and light alarm to prevent oil spill and oil shortage. Therefore, the detailed functions of the system are as follows:

• Accurate real-time measurement of oil level, water level and temperature. Using 10.4 color LCD screen, the number of storage accuracy points is not limited. It can be customized according to the customer’s volume meter, and the oil height, water height, temperature, volume, and remaining volume can be displayed in graphical and digital ways.
• Alarm function. The system has multiple alarm functions such as high liquid level (pre) alarm, low liquid level (pre) alarm, and high water level alarm. Use sound and light alarm to prevent oil spill and oil shortage.
• Self-diagnosis, management and equipment failure alarm.
• Oil intake report. It is possible to compare the liquid level before and after oil intake. Automatically calculate and save the amount of oil in and out.
• Communication function. The system is connected to the sensor through a 485 interface for data collection. At the same time, it can provide a built-in Ethernet interface, 2 RS-232 interfaces and an open protocol. Data communication with the local system and remote server.
• Product lightning protection design. With internal lightning protection and external lightning protection functions. In the event of a lightning strike, the internal circuit automatically discharges the strong lightning current and will not detonate or ignite combustible gas. The external wiring steel pipe is connected to the protective grounding system of the storage tank.
• Active communication and timing transmission data settings. The system can use external equipment to achieve active communication settings. Be able to set the target server IP address, port, user name, password and data sending time. And upload the data to the target server at the specified time and shift shift.
• Leak detection function. Due to the high measurement accuracy, the static and dynamic liquid level of the oil tank can be monitored in real time. It can also realize pipeline leakage monitoring in accordance with pipeline leakage testing procedures.

Extended reading: Oil Level Measurement Solutions for the Oil & Gas Industry

Since Sinochem’s Zhuhai Phase II oil depot currently does not have the oil intake conditions, the instrument and system cannot be fully tested and verified. But through other petrochemical companies have used the magnetostrictive level gauge as an oil tank level monitoring system for in-depth understanding. The above-described functions can all be realized, and the measurement accuracy function is carefully compared with the manual ruler. It is found that the accuracy is very high, basically reaching the level of measurement.

In summary, the magnetostrictive level gauge has outstanding advantages such as high reliability, high accuracy, low failure rate, and multi-parameter measurement. It has been regarded by experts in the petrochemical industry as the preferred instrument for liquid level and boundary level measurement. It is an ideal choice for metering and process-level monitoring. Especially in applications where the dielectric constant of the medium is low, the medium is volatile, and the measurement interface is required. Because the magnetostrictive characteristics are not affected by factors such as dielectric constant, temperature, pressure, and meteorological conditions, it has become the first choice for users. Under the trend of industrial production integration and large-scale production. Magnetostrictive level gauges will have a broader application space in future level measurement.

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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.

drurylandetheatre.com

The liquid level of the liquid ammonia storage tank is accurately measured, which can eliminate potential safety hazards.

Choosing a suitable monitoring instrument for liquid ammonia storage is a prerequisite for ensuring safe production. The main instruments in the liquid ammonia tank area include liquid level, temperature, pressure, toxic (flammable) gas alarms, etc. For tank farms where the system is rebuilt, and environments where wiring is difficult, wireless instrumentation solutions can be used.

This article analyzes the application problems of several common liquid ammonia storage tank level measuring instruments. So as to provide a basis for the selection of measuring instruments.

About Liquid Ammonia Storage Tank

Liquid ammonia is a common chemical raw material. To facilitate transportation and storage, gaseous ammonia is usually pressurized or cooled to obtain liquid ammonia. When liquid ammonia is dissolved in water, ammonium ion NH4+ and hydroxide ion OH- are formed, and the solution is alkaline. Liquid ammonia is mostly stored in pressure cylinders or steel tanks. Liquid ammonia is widely used in industry, is corrosive and easily volatile, so its chemical accident rate is very high.

Read more about: 7 Level Senors for Tank Level Measurement

Application Analysis of Common liquid Ammonia Storage Tank Level Measuring Instruments

External liquid level sensor

The external level gauge is an instrument that uses the sonar ranging principle and “micro-vibration analysis” technology to measure the level from the outside of the container. No need to make holes on the tank wall, no flanges, no fire, no tank cleaning. Do not touch the liquid and gas in the tank. It can realize online installation and maintenance. It is a completely non-contact isolated instrument.

HS-2000 External Mounted Ultrasonic Tank Level Sensor- (referred to as “external level gauge”). It adopts advanced signal processing technology and high-speed signal processing chip. It breaks through the influence of container wall thickness. Realizes the height of the liquid level in the closed container True non-contact measurement.

The ultrasonic liquid level sensor (probe) is installed directly under the outer wall (bottom) of the container under test. Calibrate the outer wall of the probe. There is no need to open holes for the container to be tested, easy to install, and does not affect production. It can accurately measure the level of various toxic substances, strong acids, strong alkalis and various pure liquids in high-pressure airtight containers. The HS-2000 External Mounted Ultrasonic Tank Level Sensor has no special requirements for the material of the liquid medium and the container. The explosion-proof design is adopted to meet the explosion-proof requirements.

The external liquid level sensor continuously and accurately measures the liquid level in the tank from outside the tank. No contact with the liquid and gas in the tank at all, realizing a true isolation measurement. Therefore, the characteristics are as follows:

1. Isolated non-contact liquid level measurement technology is very safe.
2. Installation and debugging, thereby reducing construction and maintenance costs.
3. It is more reliable and durable. There are no mechanical moving parts in the measuring probe and host, and it is strictly sealed, isolated from the outside world, and will not be worn or corroded.
4. Pass the “functional safety integrity” level certification.

Differential pressure transmitter

One end of the differential pressure transmitter is connected to the liquid phase, and the other end is connected to the gas phase. The liquid level of the liquid ammonia storage tank can be measured using the principle of hydrostatics.

In the process of applying this instrument and equipment, it is necessary to strictly control the installation height of the equipment.

Generally, it needs to be installed below the lower interface of the liquid level pressure interface of the container under test. And choose easy to maintain and observe. At the same time, it is also close to the pressure taking part.

Taking into account the low boiling point and easy vaporization of liquid ammonia, it is necessary to use a double flange differential pressure transmitter to ensure the stability of the measurement signal.

If this device is used, the installation of the device will only be limited by the length of the capillary tube.

Specifically, it is necessary to take corresponding protection and insulation measures, and ensure that the bending radius of the capillary is greater than 50mm. When using this measuring instrument, if the installation elevation changes, the output value of the device will be affected.

Differential pressure(DP) level transmitter is often used as a tank level transmitter. The DP transmitter is connected with a stainless steel flange by capillary. Flange installation. The pressure is sensed by a remote transmission device installed on container. The pressure is transmitted to the body of the transmitter through the capillary. The transmitter convert the pressure or differential pressure to 4 ～ 20mA. The DC signal is output. It can communicate for the setting and monitoring by cooperating with the HART communicator. Explosion proof available.

From the application effect point of view, the differential pressure transmitter has the characteristics of easy calibration and a wide range of popularization. At the same time, the price of this type of equipment is low, and it has a certain cost-effective advantage.

However, when installing the device, it is necessary to reserve mounting holes. At the same time, due to the close relationship between the equipment and the density change of the medium, the measurement operation will cause the material of the instrument diaphragm to be corroded by the corrosive medium. After a long time of operation, the equipment is prone to deformation of the capsule.

In the application process, if there is no indication, the indication is too large or too small and the indication remains unchanged. It is also necessary to check the power supply, safety barriers, circuit boards, diaphragm capillaries and pressure valves. And appropriately replace the equipment components and open the equipment pressure valve in time.

Magnetic flap level gauge

The application of the magnetic flap level gauge follows the law of float and the principle of magnetism, and needs to be connected to the tank through a flange.

During the measurement, the two-color cylindrical magnetic float inside the device will change under the influence of the magnetic field, and the float junction is the actual liquid level of the storage tank.

In the process of installing the equipment, it is necessary to avoid magnetic materials around the equipment, and determine the heating temperature according to the medium condition. In the case of large gas-liquid-phase opening connections, a flange needs to be installed in the middle of the level gauge.

In the process of equipment debugging, a magnetic steel corrector is needed to adjust the magnetic column to white, and then open the gas phase stop valve and the liquid phase stop valve successively, and observe the liquid level rise and fall.

The magnetic flap level gauge can measure the liquid level and interface of any medium, and the equipment itself has the characteristics of convenient and intuitive installation.

However, if there are too many impurities in the medium, the magnetic column will not flip and the measurement will fail.

At the same time, the application of this device is prone to the problem of magnetic column jamming, which will lead to the failure of remote transmission instructions. However, the price of this equipment is low, and installation holes need to be reserved during installation.

The magnetic flap level gauge is prone to problems such as no signal output from the transmitter, no change in the output signal and the range cannot be adjusted to the corresponding value during the application process. In the application process, the power supply voltage, cables, terminal pins and safety barriers need to be checked.

Cable guided wave radar liquid level sensor

The application of the cable guided wave radar level gauge follows the principle of travel time, and it is necessary to measure the distance from the reference point to the surface of the liquid ammonia by transmitting and receiving high-frequency pulse signals.

When installing the equipment, it is necessary to avoid the liquid ammonia inlet to prevent false reflections from the equipment.

When installing the sensor, it cannot be installed in the center of the tank, and the sensor must be kept away from the tank wall.

When installing the cable probe, the distance between the probe and the smooth metal wall should be greater than 50mm, the distance between the end of the probe and the bottom of the container should be greater than 0mm, and the diameter of the short tube should not be greater than 0mm. In addition, depending on the installation position, the offset of the cable probe may increase.

Guided wave radar is a measuring instrument based on the principle of time travel. The radar wave runs at the speed of light. The operating time can be converted into level signals by electronic components. The probe emits high-frequency pulses and propagates along the cable or rod probe. When the pulse meets the surface of the material, it is reflected back and received by the receiver in the instrument. And convert the distance signal into level signal. SIRD-701 Guided Wave Radar Level Sensor is suitable for liquid and Bulk Solids measurement, and complex process conditions.

The cable-type guided wave radar level gauge has the characteristics of direct contact with the medium and small measurement blind area, and the measurement accuracy is high.

However, this equipment is not suitable for measuring pressure vessels, and the price is relatively high. It is necessary to reserve mounting holes on the top of the equipment during installation.

From the point of view of application failures, the equipment may have failures such as incorrect DCS system configuration, cable probe failure, and unstable DCS display value.

In the application process, it is necessary to carry out on-site measurement before calibration, and it is not necessary to check whether the DCS configuration data is consistent with the actual measurement result in order to obtain the real data.

Before measurement, you need to clean the probe and increase the height of the empty tank appropriately to eliminate the effect of echo.

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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.

drurylandetheatre.com

The external ultrasonic tank level sensors is the first choice for measuring liquid level and material level on various industrial tanks.

The intelligent ultrasonic tank level sensor installs the ultrasonic probe directly under the tank when measuring. No need to open holes, easy to install. Does not affect on-site production. It can measure various toxic substances and pure liquids in high temperature and high pressure airtight containers. The instrument adopts explosion-proof design to meet explosion-proof requirements. The Internet of Things can be realized through GPRS and Wifi.

Features of External Ultrasonic Tank Level Sensor

• The probe is external, no need to open a hole to the container under test.. Really realize non-contact measurement.
• It is suitable for accurate measurement of the liquid level of toxic, volatile, flammable, explosive, and highly corrosive liquid media in various closed containers.
• The instrument has no mechanical moving parts and has a long life. No corrosion, no pollution, wide use area.
• The instrument has built-in ASIC (Intelligent Ultrasonic Special Hardware Integrated Circuit), which makes the instrument small in size, stable and reliable in measurement results. It can be suitable for all kinds of liquids and containers to be tested, and it is easy to install on site without complicated on-site calibration.
• The instrument has built-in various calibration functions such as automatic temperature correction and automatic fixed distance calibration. The measurement results are more accurate and reliable.
• The instrument has complete functions, with RS485 output, 4-20mA output, and switch output.
• Multiple power supply methods available
• Backup and restore configuration parameters
• The analog output can be adjusted arbitrarily
• With digital filtering and echo recognition functions
• Fixed interference filtering function can be manually set
• Support Bluetooth, GPRS communication, GPS satellite positioning, etc. (Order to buy)
• Support custom serial data format
• Support custom main display interface
• Support MiniSD card data collection (order option)

Extended reading: The Secret of Ultrasonic Level Measurement

Technical Parameter of External Ultrasonic Tank Level Sensor

Extended reading: Guide to Ultrasonic Level Transmitters

Application Industry:

1. Pharmaceutical manufacturing industry: liquid level control of reaction liquid in pipelines and storage tanks, etc.
2. Petrochemical industry: oil pipeline, internal liquid level control of storage tanks, etc.
3. Food industry: liquid level detection and monitoring projects in brewing, beverage, milk production, storage tanks, pipelines, etc.

Read more about: 7 Level Senors for Tank Level Measurement

Application Conditions:

Media Purity

the liquid cannot be filled with dense bubbles. A large amount of solids, such as crystals, cannot be suspended in the liquid.The bottom of the container cannot deposit a large amount of sand and sediment.

Medium Viscosity

When the dynamic viscosity is less than 10mPaS, it is measured normally. When 10mPaS<dynamic viscosity<30mPaS, the range of the instrument may be reduced. It cannot be measured when the dynamic viscosity is >30mPaS.

note: As the temperature increases, the viscosity decreases, and most high-viscosity liquids are more affected by temperature. Therefore, pay attention to the effect of liquid temperature when measuring viscous liquids.

Container Under Test

1. Material: The container wall where the measuring probe is installed is required to be made of hard materials that can transmit signals well. Examples: carbon steel, stainless steel, various hard metals, glass steel, hard plastics, ceramics, glass, hard rubber and other materials or their composite materials. If the container wall where the measuring probe is installed is of multilayer material, the layers should be in close contact with no bubbles or gas interlayers. The inner and outer surfaces of the container wall should be flat. Examples: vulcanized hard rubber lining, stainless steel lining, titanium lining Floor.
2. Wall thickness: 1-100mm
3. Tank type: spherical tank, horizontal tank, vertical tank, etc.

Probe Installation Requirements:

1. For iron containers, you can apply silicone grease to the working end of the probe and stick it directly to the bottom of the container with a magnetic suction cup; if the container shell is made of glass or other materials, you can use glue to fix the probe or use a bracket to fix it. The bottom of the container. The probe point must be on the same straight line as the measured distance.
2. There are no obstructions such as coils directly above the probe;
3. Keep away from the liquid inlet at the bottom of the tank to avoid the influence of the violent flow of the liquid on the measurement;
4. Keep away from the position below the liquid inlet on the top of the tank to avoid the impact of the liquid inlet and the violent fluctuation of the liquid level to affect the measurement;
5. It is higher than the liquid outlet or the sewage outlet to avoid the influence of long-term deposits on the bottom of the tank on the measurement. If the conditions are not met, measures should be taken to ensure that the bottom of the tank is regularly removed;
6. When the liquid level measuring head is installed by magnetic or welding/adhesive fixing method, the installation surface size on the container wall should not be less than the round surface of Ф80, the surface roughness should reach 1.6, and the inclination should be less than 3°(bypass pipe exce

• Technologies
• Application
• FAQ

What Is External Ultrasonic Tank Level Sensor?

Ultrasonic level meter is a high-tech product that integrates ultrasound, electronics and software. The various indicators of the ultrasonic level meter have reached the advanced level of similar products in the world. and it is the first-choice instrument for measuring liquid level and material level on various industrial sites.

How Do External Ultrasonic Tank Level Sensors Work?

Install the ultrasonic probe directly below the outer wall of the container under test. No need to open holes, easy to install, and does not affect on-site production. It can accurately measure various toxic substances and various pure liquids in high temperature and high pressure airtight containers.The instrument has built-in ASIC (Intelligent Ultrasonic Special Hardware Integrated Circuit), which makes the instrument small in size, stable and reliable in measurement results, and can be suitable for various liquids and containers to be tested. It is easy to install on site and does not require complex on-site calibration.

The instrument has built-in various calibration functions such as automatic temperature correction and automatic fixed distance calibration to make the measurement results more accurate and reliable. The Internet of Things can be realized through GPRS and Wifi.

How Do You Mount An External Ultrasonic Tank Level Sensor?

The probe is installed externally, no need to open a hole in the container to be tested, and truly realize non-contact measurement.It is suitable for accurate measurement of the liquid level of toxic, volatile, flammable, explosive, strong pressure, strong corrosive and other liquid media in various closed containers.The instrument has no mechanical moving parts and has a long life. No corrosion, no pollution, wide use area.

What Are The Benefits?

1. Safe : No valves, connecting pipes, joints, no leaks, no contact with the liquid and gas in the tank, very safe, when measuring toxic, corrosive, pressure, flammable, volatile, and easy to leak liquids
2. Hygiene: liquid level detection and monitoring projects in brewing, beverages, milk production, storage tanks, pipelines, etc. do not come in contact with liquids and cause pollution.
3. Convenient installation and maintenance: no fire or tank cleaning during installation and maintenance will not affect production.

Read more: Guide: Non-contact Ultrasonic Level Sensing transmitters

When measuring the External Ultrasonic Tank Level Sensor, install the ultrasonic probe directly under the outer wall (bottom) of the container under test. No need to open holes, easy to install, and does not affect on-site production. It can be used to treat various toxic substances in high temperature and high pressure airtight containers. Accurate measurement of a pure liquid.

The External Ultrasonic Tank Level Sensor adopts explosion-proof design to meet explosion-proof requirements. The probe is installed externally, no need to open a hole in the container to be tested, real non-contact measurement, suitable for accurate liquid level of toxic, volatile, flammable, explosive, strong pressure, strong corrosive and other liquid media in various closed containers measuring.

The External Ultrasonic Tank Level Sensor has no mechanical moving parts and has a long life. No corrosion, no pollution, wide use area. More about Top 5 Ultrasonic Level Sensor Applications.

In the design work, a reasonable and optimized External Ultrasonic Tank Level Sensor selection scheme was made according to each project. Judging from the production and application, the effect is very good.

1.Field application of butadiene

In a rubber project, it is necessary to measure the level of butadiene in the spherical tank. Butadiene is prone to self-polymerization to produce high molecular polymers, and the selection of ordinary liquid level meters is limited. According to the requirements of “Tank Area Automation System Design Regulations”, “Each pressure storage tank should be equipped with two sets of independent and different types of liquid level measuring instruments”. If the conventional contact liquid level gauge is selected for this project, butadiene is at the dead corner of the detection port The possibility of self-aggregation is very large, so the non-contact type should be given priority to the selection of the level gauge. Finally, a set of non-contact radar level gauges were installed on the top of the tank, and a set of External Ultrasonic Tank Level Sensors were installed on the bottom of the tank. After the field application, the externally attached ultrasonic level gauge measures accurately and the effect is very good.

2.Field application of liquid ammonia

In the design of a certain liquid ammonia spherical tank, the External Ultrasonic Tank Level Sensor also has a good application. The liquid ammonia in the storage tank is a colorless, pungent odor and toxic liquid, which is corrosive to a certain extent. Because the density of liquid ammonia is greatly affected by temperature, the differential pressure level gauge is not applicable in this project, and the external ultrasonic level gauge is finally used for detection.

3.Field application of high pressure storage tank

In a high-pressure hydrogenation plant, due to the unstable parameters of the original level gauge on the high-pressure storage tank, the owner wanted to add a level gauge to compare with it. However, the installation space of the high-pressure vessel was small on site, and the conditions for reopening were not available. After negotiation, it was decided to adopt an external ultrasonic level gauge, which not only avoided the economic loss caused by the shutdown of the device, but also prevented new pressure vessels. Increase the safety hazards of leakage points, simple installation, accurate and reliable, can be described as three birds with one stone.

4.Ultrasonic sensor for Oil/fuel level measurement

The External Ultrasonic Tank Level Sensor adopts explosion-proof design to meet explosion-proof requirements. The probe is installed externally, no need to open a hole in the container to be tested, real non-contact measurement, suitable for accurate liquid level of toxic, volatile, flammable, explosive, strong pressure, strong corrosive and other liquid media in various closed containers measuring. Therefore, the External Ultrasonic Tank Level Sensor is the best level measurement sensor for diesel, gasoline and other oil tanks. More about Diesel Fuel Level Sensor Types.

5. Other field applications

The External Ultrasonic Tank Level Sensor can be a good substitute for radar level gauges in some occasions where the dielectric constant is low, such as liquefied gas (dielectric constant <1.9) or the liquid surface contains a lot of bubbles and other radar level gauges are not suitable for use; For some highly corrosive acid and alkali storage tanks, such as liquid chlorine storage tanks, the External Ultrasonic Tank Level Sensor is also very useful.

External Ultrasonic Tank Level Sensor common available media include liquid chlorine, liquefied gas, liquid ammonia, ethylene, butadiene, gasoline, diesel, benzene, liquid bromine, hydrochloric acid, lye, nitric acid, methanol, vinyl chloride, hydrofluoric acid, ethylene Glycol, propane, naphtha, ethylene oxide, dimethyl ether.

Extended reading: ultrasonic level sensor for diesel tank

Can External Ultrasonic Tank Level Sensors Detect Water Level?

Ultrasonic liquid level sensor can be used for water level measurement. The principle of ultrasonic reflection used. According to the contact between the sound wave emitted by the pool ultrasonic liquid level gauge and the liquid surface. According to the length of time it reflects back. To measure the height of the liquid level in the tank.
Liquid level sensors are used in many sites to detect some conditions that require liquid level monitoring. It is well known that the liquid level of some sewage treatment tanks, the liquid level on the tank, the liquid level on the river channel and so on.

What is an ultrasonic level sensor?

Ultrasonic level sensor is a monitoring instrument for measuring liquid height, tank height, and material position.

Ultrasonic level sensor can adopt two-wire, three-wire or four-wire technology.

The two-wire system is: power supply and signal output are shared.
The three-wire system is: the power supply circuit and the signal output circuit are independent. When using DC 24v power supply, a 3-core cable can be used, and the negative terminal of the power supply and the negative terminal of the signal output share a core wire.
The four-wire system is: when using AC 220v power supply, or when using DC 24v power supply, when the power supply circuit and the signal output circuit are required to be completely isolated, a 4-core cable should be used.
DC or AC power supply, 4~20mADC, high and low switch output.

More about Ultrasonic Level Sensing Technology.

What are the different types of level sensors?

There are 7 main types of level transmitters that Sino-Inst offers for water level indicate. Each type of transmitter works in a different way, and makes it useful for different types of processes.

• Capacitance Level Transmitters
• Hydrostatic Level Transmitters
• Magnetic Level Transmitters
• Radar Fill Level Transmitters
• Ultrasonic Level Transmitter
• Guided Microwave Level Transmitters
• Liquid Level Transmitters

Read More About: Explosion Proof Ultrasonic Level Sensors Operating Principle.

Related products and technologies

More Tank Level Measurement Solutions

Read more about: Ultrasonic Level Sensors for Liquids Applications

Sino-Inst offers over 10 External Ultrasonic Tank Level Sensors and transmitters for level measurement. About 50% of these are liquid level meters, 40% is the level switches.

A wide variety of External Ultrasonic Tank Level Sensors and transmitters options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of External Ultrasonic Tank Level Sensors and transmitters instrumentation, located in China.

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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.

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