Radar Water Level Sensor Technical Specifications

Main advantages:

Based on the self-developed CMOS millimeter wave RF chip, a more compact RF architecture is achieved. Higher signal-to-noise ratio and smaller blind spots.
5GHz working bandwidth enables the product to have higher measurement resolution and measurement accuracy.
The narrowest 3° antenna beam angle, the interference in the installation environment will have less impact on the instrument. The installation is more convenient.
The wavelength is shorter and has better reflection characteristics on solid surfaces. Therefore, no special universal flange is required for aiming.
Support remote debugging and remote upgrade. Reduce waiting time and improve work efficiency.
Support mobile phone Bluetooth debugging. It is convenient for on-site personnel to maintain work

Communication and Debugging

The instrument can be debugged through the LCD on site. It can also be debugged on the PC side with the optional host computer software.
The communication between the radar instrument and the PC is carried out in the following ways:

1. USB to RS485 serial cable (four-wire system);
2. USB to TTL serial cable (two-wire system);
3. USB to Hart-modem (two-wire system) for communication.
4. Debugging via mobile phone Bluetooth makes on-site debugging safer and more convenient.
5. 4G network, through the remote module, for remote debugging.

Radar Water Level Sensors Applications

Radar Water Level Sensor Measuring Culverts

A culvert is an engineering structure used to solve the intersection of rivers, streams and other water bodies in road or rail traffic. It works by creating a channel under a body of water that allows the flow of water to flow through it. While maintaining road or rail connectivity. Water level monitoring is crucial in the design and maintenance of culverts.

As a commonly used measuring device, Radar Water Level Sensor has its unique advantages, which can accurately and real-time monitor the water level changes of culverts.

Through the monitoring and analysis of the water level data of the culvert, the water level change of the culvert can be understood in time.

For example, in the rainy season, if the water level of the culvert exceeds a certain safe water level. Engineers can take timely action. Such as increasing the drainage capacity of culverts to ensure smooth and safe traffic.

In addition, water level data can also provide important reference information when maintaining and repairing culverts. Helps engineers determine if culverts have problems or require maintenance.

Application of Radar Water Level Sensor in Shoal

There are several aspects to the application advantages of Radar Water Level Sensor in shoals.

First of all, Radar Water Level Sensor uses microwave signals to measure, which has the characteristics of high precision. It can realize fast and accurate measurement of shoal water level.

Secondly, Radar Water Level Sensor is not affected by weather conditions. Water level measurement can be carried out in various harsh environments, such as rainy and snowy weather, night and so on.

At the same time, the Radar Water Level Sensor is not affected by physical disturbances such as currents, wind and waves. It can realize stable and accurate water level measurement.

Finally, Radar Water Level Sensor is suitable for the measurement of various water environments, and can adapt to various water environments such as shoals, rivers, and lakes.

Radar Water Level Sensor measures river course

As an instrument for measuring river channels, Radar Water Level Sensor uses high-frequency pulse waves for measurement, which has the advantages of high precision and high resolution.

Accurate and real-time monitoring of the water level of the river can be realized, and the precision and accuracy of water level monitoring and control are effectively improved.

In addition, the non-contact measurement method is used to avoid errors and potential safety hazards that may occur in the traditional physical contact measurement method.

At the same time, non-contact measurement can also perform automatic monitoring, which improves the efficiency and accuracy of water level monitoring.

Radar Water Level Sensor measures manhole

As a part of the urban drainage system, the water level measurement of the inspection well faces some particularities and the environment is complex. The inspection well is usually located underground and the environment is complex. There are factors such as high humidity and large temperature changes, which will interfere with the water level measurement.

Large range of water level changes: The range of water level changes in inspection wells is usually large. The water level changes greatly from dry wells to full wells. It is necessary for measuring instruments to have a large measurement range and high precision.

Dirt interference: There may be a lot of dirt in the inspection well, such as sediment, garbage, etc. These dirt will interfere with the water level measuring instrument and affect the measurement accuracy and stability.

Radar Water Level Sensor has great advantages in manhole measurement. It can not only work stably in a complex environment, but also provide accurate and reliable water level data. It provides an important basis for inspection well management and maintenance.

Radar Water Level Sensor measures reservoir water level

A reservoir is an artificially constructed water storage facility, and its water level measurement is very important for the management and operation of the reservoir. Radar Water Level Sensor is widely used in the measurement of reservoir water level due to its stable and reliable features.

First of all, the water level of the reservoir changes slowly. Compared with other water bodies, the water level of the reservoir is usually relatively stable. In this way, the Radar Water Level Sensor can accurately measure the water level and give feedback to the management personnel in time. It is convenient for them to manage the reservoir and scheduling.

Second, the water level of the reservoir varies widely. Radar Water Level Sensor can meet this demand. It has a wide measurement range and can adapt to different water level changes.

In addition, the measurement accuracy of the reservoir water level is high. The Radar Water Level Sensor features high precision to accurately measure water levels.

More Radar Water Level Meters

More Level Measurement Solutions

As a commonly used water level measuring instrument, Radar Water Level Sensor has important application value in various water level measurements. The application of Radar Water Level Sensor has played a positive role in the operation of water supply sources and hydropower stations. Improved efficiency of water level management.

Sino-Inst is a professional radar level meter supplier. Our Radar Water Level Sensor is a 76-81GHz frequency modulated continuous wave (FMCW) radar product that supports four-wire and two-wire applications. Support customized range 0.05m~35m~70m~120m. If you need to measure water level, you can contact our sales engineers!

Request a Quote

64-80GHz FMCW Level Radar is a radar sensor for continuous level measurement of liquids. Sino-Inst also launched a radar level sensor operating at 76-81 GHz.

Features of 76-81GHz FMCW Level Radar

The LM78xx series is an FMCW radar operating at 76-81 GHz, which has a maximum measuring range of 120m and a minimum blind zone of 8cm. It supports 4-wire and 2-wire applications. Higher operating frequency and shorter wavelengths make it ideal for solid applications, including those with extreme dust and high temperature to + 200℃.

The radar consists of an electronic circuit coupled to a lens antenna and flange for quick and easy positioning.

The main benefits of using 78 GHz over devices using lower frequency are:

• Based on the self-developed CMOS millimeter wave RF chip, a more compact RF architecture, a higher signal-to-noise ratio, and a smaller blind zone are realized.
• 5GHz working bandwidth means higher measurement resolution and accuracy.
• 3°antenna beam angle, so the interference in the environment has less impact on the instrument, and the installation is more convenient.
• Shorter wavelength yields good reflection properties on sloped solids, so aiming towards material angle of repose is usually not necessary.
• Support remote debugging and remote upgrading to reduce the cost of field personnel.

Communication and Programming

LM78XX supports 485 bus protocol (4-wire), serial-port (2-wire) protocol, and hart (2-wire) protocol. It is very easy to install and configure via an optional graphical local display interface on a PC. Or you can modify the built-in parameters either locally via the pushbuttons. Or you can use a cell phone to control LM78xx via Bluetooth.

Extended Reading: Case: High Temperature Radar Level Transmitter for Melted Salt-Solar Photovoltaic Power Station

Specifications of 76-81GHz FMCW Level Radar

Frequency	76GHz ~ 81GHz,  5GHz FMCW bandwidth
Measuring range	LM78x0: 0.3 m ~ 60m LM78x1: 0.08m~30m LM78x2: 0.6m ~ 120m
Measurement accuracy	±1mm
Beam angle	3°/8°
Minimum measured dielectric constant	>=2
Power	15~28VDC
Communication	LM782x: MODBUS LM783x: HART/Series
Signal output	LM782x: 4 ~ 20mA or RS-485 LM783x: 4~20mA
Fault output	3.8mA, 4mA, 20mA, 21mA, hold
Field operation / programming	128 × 64 dot matrix display / 4 buttons PC software Bluetooth
humidity	≤95%RH
Enclosure	Aluminum alloy, stainless steel
Antenna type	Lens antenna/anti-corrosive antenna/flange isolated by quartz
Process temperature	T0:-40~85℃; T1:-40~200℃; T2:-40~500℃; T3:-40~1000℃
Process pressure	-0.1~2MPa
Product Size	Ø100*270mm
Cable entry	M20*1.5
Recommended cables	AWG18 or 0.75mm²
Protection class	IP67
Explosion-proof grade	ExdiaIICT6
Installation method	Thread or flange
Weight	2.480Kg/2.995Kg
Packing box size	370*270*180mm

Extended reading: FMCW Radar Level Transmitter 120GHz

64-80GHz FMCW Level Radar Applications

Application area:

Special advantages are the small process fittings for small tanks or tight spaces. The very good signal focusing allows use in vessels with many internal installations.

LM78 series FMCW Level Radar Applications

It is suitable for large range, high dust, steam condensation, mixing, narrow installation space, and occasions with high precision and blind zone requirements.

Applicable working conditions:

• Intermediate silo
• Warehouse
• hopper
• Storage tank
• Process tank
• Mixing tank

Extended Reading: Influence of Dielectric Constant on Liquid Level Measurement | Radar-Guided Wave Radar Level Meter

https://www.drurylandetheatre.com/wp-content/uploads/2021/03/76-81GHz-FMCW-Level-Radar-test-1.mp4

Download Datasheet

More Featured Non-Contacting Radar Level Measurement

Sino-Inst offers Alternative to 64-80GHz FMCW Level Radars for level measurement.

A wide variety of 64-80GHz FMCW Level Radars options are available to you, such as free samples, paid samples.

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

Request a Quote

High Temperature Level Sensor is used for high temperature tanks. Especially for solid measurement under high temperature environment. Such as blast furnace material level measurement.

Features of SIRD-806 Radar High Temperature Level Sensor

• No blind spots. High precision.
• The two-wire technology is an excellent alternative to differential pressure meters, magnetostrictive, radio frequency admittance, and magnetic flap meters.
• Not affected by pressure changes, temperature changes, inert gas, vacuum, smoke, steam, etc.
• Easy to install, durable and maintenance-free.
• HART or PROFIBUS-PA communication protocol and fund field bus protocol. The calibration is simple and easy to realize the on-site calibration operation through the digital LCD display. Realize simple configuration setting and programming through software GDPF.
• The measurement is sensitive and the refresh speed is fast.
• Suitable for high temperature working conditions, up to 200°C process temperature, up to 300°C when using high temperature extension antenna.

Specifications of SIRD-806 Radar High Temperature Level Sensor

Applicable medium:	Solid, especially medium measurement in high temperature environment
Application:	Blast furnace level measurement
Explosion-proof certification:	Exia IIC T6 Ga/Exd IIC T6 Gb
Measuring range:	15m
Antenna:	Horn antenna
Frequency:	6 GHz
Process temperature:	(-40～400)℃
Measurement accuracy:	±20mm
Process pressure:	(-0.1～0.3)MPa
Signal output:	(4～20)mA/HART
On-site display:	Four-digit LCD programmable
Power supply:	Two-wire system (DC24V) Four-wire system (DC24V/AC220V)
Repeatability:	± 1mm
Housing:	Single cavity/Aluminum Double cavity/Plastic/Stainless steel Single cavity
Process connection:	Flange

Extended Reading: Case: High Temperature Radar Level Transmitter for Melted Salt-Solar Photovoltaic Power Station

SIRD-806 Radar High Temperature Level Sensor Applicaiton

1) Iron and steel metallurgy: CDQ pre-storage room. Coal bunker, iron ore, and the top of CDQ pre-storage room of Coke Dry Quenching device (CDQ). Radar waves are emitted to continuously measure the inside of CDQ pre-storage room Red hot coke level

2) Cement industry: raw material warehouse, clinker warehouse, rotary kiln, petroleum coke and finished cement warehouse

3) Power industry: fly ash warehouse, pulverized coal warehouse

Extended reading: ​Solid flow meter | For bulk solids-powder-soybean-cement 

Application of Radar High Temperature Level Sensor in Blast Furnace

The level of the blast furnace is a very important measurement data in the steel industry. It plays a very important role in the quality control of steel production, the improvement of production efficiency and the improvement of production safety.

Extended reading: GWR Solid Level Sensor-for Cement silo-Ash powder measure

For a long time, major steel manufacturers have been committed to finding an economical solution with long service life, reliable performance, low maintenance, and high measurement accuracy.

In the working condition of a blast furnace, there are usually three main measurement requirements for level measurement:
Blast furnace material level measurement;
Level measurement of blast furnace distribution bin;
Torpedo tank hot metal level measurement.

Extended Reading: Featured Silo Level Sensors

1. Blast furnace material level measurement.
   Need to use the level sensor to measure the mineral material to be added to the blast furnace. The control of the material level needs to ensure that the material level is maintained at a certain height. The height of the blast furnace silo cannot be empty. Otherwise, there is no guarantee that the mineral material of the cloth bin will be supplied in time. Do not make the silo material level too full, resulting in overflow. Generally, the maximum measurement range required for this measurement point is about 5-6 meters.
2. The main difficulty in measuring the slag level of the blast furnace distribution bin is: the temperature at the top of the bin top is very high, generally exceeding 600°C. The top thickness of the silo roof is relatively large, generally about 1 meter to 1.5 meters.
   The outlet temperature at the installation location of the level gauge generally exceeds 600°C. After repeated research, it is found that the high temperature is mainly caused by the radiant heat of the high temperature medium in the warehouse. Guide wave elbow can be made to avoid the high temperature gas at the outlet of the warehouse roof installation.
   In addition, in order to reduce the influence of conduction heat, the length of the entire waveguide is more than 2 meters. So that the high temperature gas in the tube can get enough cooling pipe section. After installing the guided wave elbow, the temperature of the installation flange is less than 100℃.
3. Measurement of molten iron in torpedo tanks.
   The temperature of molten iron is as high as 1000℃ or more. But because the measured medium is liquid, the main problem to be solved is how to solve the problem of high temperature.
   At this measurement point, three different methods can be used to solve the high temperature problem.
   
   • Install compressed air channels on the extended installation standpipe. Inject compressed air to reduce the process temperature of the horn antenna port of the radar level gauge.
   • Design of guided wave elbow. Avoid ultra-high temperatures caused by radiation.
   • Keep a certain distance between the horn antenna of the radar level sensor and the installation port. To reduce the ultra-high temperature in the process.

The application of the radar level sensor on the blast furnace can take full advantage of the characteristics of solid-type radar, and the cost performance is very high. Radar High Temperature Level Sensor provides an ideal solution acceptable to customers for blast furnace level measurement applications.

Extended reading: Radar level sensor for solids – Dust solid level measurement

Featured High Temperature Level Sensors

High temperature tank level sensor

High temperature liquid level sensor

High temperature Non-contact level sensor

Sino-Inst offers over 10 Radar High Temperature Level Sensors for level measurement. About 50% of these are Radar level meters, 40% is the tank level sensor.

A wide variety of Radar High Temperature Level Sensors are available to you, such as free samples, paid samples.

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

Request a Quote

Slurry Tank Level Sensor is specially used to measure the slurry level in the storage tank. Such as powder slurry tank measurement, liquid measurement with stirring.

Features of SIRD-805 Radar Slurry Tank Level Sensor

• The beam angle is small, and the energy is concentrated. It has stronger anti-interference ability. It greatly improves the measurement accuracy and reliability;
• The antenna size is small. It is easy to install and install dust cover and other antenna protection devices;
• The measurement blind area is smaller. Good results can also be obtained for small tank measurement;
• The wavelength is shorter. It is more suitable for level measurement of dust and small particles;
• Using advanced microprocessor and unique EchoDiscovery echo processing technology, it can be applied to various complex working conditions.
• It adopts pulse working mode with extremely low transmitting power. It can be installed in various metal and non-metal containers without harm to human body and the environment.

Extended Reading: How to Measure Volume of Liquid

Specifications of SIRD-805 Radar Slurry Tank Level Sensor

Applicable medium:	Liquids, especially liquids with low dielectric constant, slightly viscous, and stirring
Application:	20% flour slurry tank measurement; liquid measurement with stirring
Explosion-proof certification:	Exia IIC T6 Ga/Exd IIC T6 Gb
Measuring range:	20m
Antenna:	Horn antenna
Frequency:	6 GHz
Process temperature:	-40～130℃(standard type)/-40～250℃(high temperature type)
Measurement accuracy:	±10mm
Process pressure:	(-0.1～4)MPa
Signal output:	(4～20)mA/HART
On-site display:	Four-digit LCD programmable
Power supply:	Two-wire system (DC24V) Four-wire system (DC24V/AC220V)
Repeatability:	± 1mm
Housing:	Single cavity/Aluminum Double cavity/Plastic/Stainless steel Single cavity
Process connection:	Flange

Extended reading: Industrial Tank level indicators and Tank Level Gauges

How to select right Tank Level Sensor ?

Radar Level Sensor is a very common level measurement tool, which is widely used in various complicated working conditions.

So how to select the Radar Level Sensor with stirring and vacuum?

Selection under stirring

Radar Level Sensor is generally not used for guided wave radar in a tank with stirring.

The force of stirring can easily bring the cable of the guided wave radar into the propeller or bend the rod of the guided wave radar.

Therefore, only the high-frequency or low-frequency horn Radar Level Sensor for non-contact measurement can be selected.

If the liquid level on site is above the stirring propeller, it generally has no effect on the measurement.

If the liquid level will be lower than the stirring propeller, the false echo function must be used to filter out the signal reflected by the propeller. This can ensure that the propeller is not used as a target when measuring.

Selection under vacuum conditions

Under vacuum conditions, the boiling point of liquids will be much lower than under standard atmospheric pressure. Many liquids start to boil at 30-40°C.

The reaction kettle and evaporation kettle in the pharmaceutical factory are like this. When there is no vacuum, the liquid is very calm. After vacuuming, the liquid of 1 meter will become 3 meters high, all of which are boiling bubbles and fine water droplets. In this case, you can only use the horn-mouth Radar Level Sensor. Then you need to make certain changes on-site, and you can contact the Radar Level Sensor manufacturer for details.

Power and output signal

Radar Level Sensor’s power supply is basically 24VDC on the market. If the customer requires 220VAC, then a 220VAC to 24VDC switching power supply will do.

There are two types of radar output signals: 4-20mA and 485.

4-20mA is currently the dominant one and is widely used in industrial situations. There are few users of 485, and it is generally used in occasions that require low power consumption. For example, water conservancy and hydrology, flash flood warnings, etc.

Extended reading: Ultrasonic level transmitter for Hazardous Liquids

Featured Tank Level Sensors

External Tank Level Sensor

Water Tank Level Sensor

Ultrasonic Tank Level Sensor

Sino-Inst offers over 10 Radar Tank Level Sensors for level measurement. About 50% of these are Radar level meters, 40% is the tank level sensor.

A wide variety of Radar Tank Level Sensors are available to you, such as free samples, paid samples.

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

Solid level sensor is also called the solid state level sensor. Specially used to measure solid material level. Non-contact Continuous level measurement in solid particles or bulk solids.

Features of SIRD-804 Radar Solid Level Sensor

• Non-contact measurement. No wear and no pollution
• Short wavelength, especially suitable for medium measurement in solid dust environment
• The blind area is small, and the small silo can also obtain good measurement results
• The beam angle is small and the energy is concentrated. The echo ability is enhanced, which is beneficial to avoid interference
• High signal-to-noise ratio, better performance can be obtained even in fluctuating conditions
• Small size speaker, easy to install on site
• Explosion-proof type is optional. Suitable for applications in hazardous locations
• LCD dot matrix liquid crystal display. What you see is what you get

Specifications of SIRD-804 Radar Solid Level Sensor

Applicable medium:	Solid particles or blocks, not suitable for solid powder
Application:	Lime block measurement; raw coal measurement
Explosion-proof certification:	Exia IIC T6 Ga/ Exd IIC T6 Gb
Measuring range:	35m
Antenna:	Horn antenna
Frequency:	6 GHz
Process temperature:	-40～130℃(standard type)/-40～250℃(high-temperature type)
Measurement accuracy:	±20mm
Process pressure:	(-0.1～0.3)MPa
Signal output:	(4～20)mA/HART
On-site display:	Four LCD programmable
Power supply:	Two-wire system (DC24V) four-wire system (DC24V/AC220V)
Repeatability:	± 1mm
Housing:	Single cavity/aluminum double cavity/plastic/stainless steel single cavity
Process connection:	Universal joint flange (optional)

Featured Radar Solid Level Sensors

Solid level measurement

A solid Level Sensor refers to an instrument that detects changes in the height of solid materials in containers in real-time. Level gauges are also called level transmitters, level controllers, level gauges, and level gauges.

Solid level measurement is widely used in modern industrial production, mainly to detect the height of materials in closed or open containers during industrial production.

Generally speaking, the continuous detection method of material height is called the continuous measurement method. The detection of material height reaching a certain position is called limit measurement method, or switch measurement method.

The instrument that is often used to measure and control the level of solids or liquids in storage tanks, tanks, etc. is called Solid Level Sensor.

Among them, the instrument specifically used to measure solids is also called Solid Level Sensor. The instrument specially used to measure liquid is called a liquid level sensor. Extended reading: Radar Level Meter for Corrosive Liquids

There are many types of Solid Level Sensors. This article will list the most common and commonly used types of level meters on the market today, and briefly introduce them to users.

Static pressure type level meter: used for level measurement in tanks or containers, can be installed directly or through remote sealing components.

Ultrasonic level meter: used for level monitoring of liquids and granular solids.

Radar level meter: small beam angle (minimum 5 degrees), energy concentration. Stronger anti-interference ability. Greatly improved measurement accuracy and reliability. Both solid dust and liquid can be monitored.

Capacitive level meter: level measurement under high temperature and high pressure conditions. Dustproof, anti-hanging material, anti-steam, anti-condensation. A new type of capacitive continuous level meter. Due to the use of radio frequency technology and microcomputer technology, it solves the problems of large temperature drift, difficult calibration and fear of adhesion of traditional capacitive level meters.

It can be widely used in continuous measurement of liquid and solid silo levels in various industries. Especially for measurement under high temperature, strong corrosion, strong adhesion, and dusty environment, the capacitive level meter is the most suitable.

Level switch: It is used to detect the predetermined liquid level of granular solids, slurries and interfaces. Ultrasonic method or high-sensitivity capacitive measurement.

Extended reading: Radar level sensor for solids – Dust solid level measurement

Ultrasonic Level Sensor for Solids

The ultrasonic pulse emitted by the ultrasonic transducer is transmitted to the surface of the object to be measured through the propagation of coal qualification. After reflection, it returns to the receiving transducer through the sound transmission medium.

Measure the time that the ultrasonic pulse propagates in the sound transmission medium from the transmission to the reception. Then according to the speed of sound in the sound transmission medium, the distance from the transducer to the object surface can be calculated. To determine the level.

FAQ

Sino-Inst offers over 10 Radar Solid Level Sensors for level measurement. About 50% of these are Radar level meters, 40% is the tank level sensor.

A wide variety of Radar Solid Level Sensors are available to you, such as free samples, paid samples.

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

Oil tank level sensor is very important in the petroleum industry. Oil storage tanks are important for oil refineries to store crude oil and refined oil. The level of the storage tank is one of the important parameters of the oil gathering and transportation process.

Choose Your Right Level Sensor

There are many liquid-level measurement techniques currently used in storage tanks. According to the measurement method, it can be divided into contact type and non-contact type.

Contact measurement methods mainly include manual detection rulers. Float-type steel belt level sensor. Servo type level sensor. Static pressure type level sensor. Magnetostrictive level sensor. Radiofrequency admittance level sensor.

Non-contact measurement methods mainly include an ultrasonic level sensor, radar level sensors, etc.

At present, the commonly used measurement methods on the market that can meet the requirements of commercial level sensors are: magnetostrictive level sensors, servo-type level sensors, radar level sensors, static pressure level sensors, etc.

The hydrostatic liquid level measurement system (HTG) is too complicated and requires a lot of maintenance and other shortcomings. The usage is getting less and less.

As a high-precision liquid level measurement method, radar level sensors are more and more recognized and accepted by customers because of their large range, convenient installation, and low maintenance.

Moreover, in recent years, the price of radar level sensors has decreased year by year. Many ordinary users have also begun to use radar level sensors as a liquid level measurement solution for storage tanks.

Read more about 7 Level Senors for Tank Level Measurement

How to choose a suitable level sensor for different use environments?

1. On-site liquid level measurement of storage tanks. Suitable to use magnetic float level sensor and float level sensor. Direct-reading color glass plate level sensor can also be used;
2. The liquid level measurement of crude oil, light oil, heavy oil, and chemical raw materials (non-corrosive) storage tanks is suitable for the use of radar level sensors (high frequency radar level sensors, guided wave radar level sensors);
3. Liquid level measurement of inner floating roof tank, pressurized tank, outer floating roof tank, storage tank with agitator or swirling flow. Radar level sensor with still-pipe installation method should be selected;
4. Measurement of the liquid level of the dome tank. Optional guided wave radar liquid level sensor. High-frequency radar liquid level sensor can be used for liquid level measurement of floating roof tank. Of course, if the floating roof adopts in-pipe measurement, guided wave radar level gauge or intelligent radar level sensor can also be used;
5. Measurement of liquid quality, density, volume and liquid level of pressure tanks, vaulted tanks, atmospheric tanks, and floating roof tanks. Can use static pressure tank liquid level sensor. But do not use high viscosity liquid level measurement.
6. The liquid level measurement of crude oil, refined oil, asphalt, ethylene, propylene, liquefied petroleum gas, liquefied natural gas and other mediums in large vaulted tanks and spherical tanks. In order to use guided wave radar liquid level sensor.

Extended reading: Radar Level Meter for Corrosive Liquids

The application of radar Oil Tank Level Sensor in the petrochemical industry

According to the characteristics of the storage tank medium, the measurement of the storage tank can be divided into five types: light oil and crude oil, heavy oil, asphalt, liquefied gas, and corrosive medium. The following will briefly introduce the application of radar-level sensors in these media.

Featured Fuel Tank Level Switch & Sensors

Sino-Inst offers over 10 Radar Oil Tank Level Sensors for level measurement. About 50% of these are Radar level meters, 40% is the tank level sensor.

A wide variety of Radar Oil Tank Level Sensors are available to you, such as free samples, paid samples.

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

Radar Level Gauge Quick Installation Guide

Tank installation

A standard installation

• The radar antenna cannot tilt to the tank wall.
• In order to minimize temperature effect, at the junction of butt joint flange must use the spring washer.
• The rod antenna launching point must reach out to install pipe.
• The vertical placement of the rod antenna beam direction, don’t let the tank wall.

Installation instructions

Tank installation instructions

26g Radar Level Meter

The radar level gauge uses a transmission frequency of up to 26G, which has the following advantages over 6G radar:

1. The high-frequency radar level meter (mainly 26GHz) has high energy and small beam angle. Generally, the beam angle of a Φ95mm horn antenna is 8º. When the horn antenna diameter of a 6GHz low-frequency pulse radar is Φ246mm, the beam angle is only 15º. The advantages of small antenna size and high precision.
2. The wavelength of the 26GHz radar is 11mm, and the wavelength of the 6GHz radar is 50mm. When the radar measures the bulk material level, the radar wave reflection mainly comes from the diffuse reflection of the material surface. The intensity of the diffuse reflection is directly proportional to the size of the material. It is inversely proportional to the wavelength. Most bulk materials The straight length of the material is far less than 50mm. 26GHz radar is the best choice for bulk material level measurement.
3. In the application of some small tanks with small diameter and short height. When the medium in the tank or the strong corrosive medium has volatile gas, the effect of ultrasonic measurement is poor. The radar effect is good. The 6GHz radar antenna length (300-400mm) is invisible Increase the blind area (about 600mm). Due to the poor directivity of the 6GHz radar (large opening angle), multipath reflections will occur in a small tank. The 26GHz radar frequency is high and the antenna is short. The directivity is good. It overcomes the shortcomings of the 6GHz radar. Suitable for small tank measurement.
4. Due to the harsh site environment, dirt and water vapor will accumulate on the radar antenna over time. The 26GHz radar antenna is small. Adding a radome can greatly improve the impact of dirt and water vapor. The 6GHz radar frequency is low. The antenna size is large. An antenna is added. The cover is very difficult. The overall instrument is large and it is difficult to clean up.
5. Due to the good directivity of the 26GHz radar. Many harsh working conditions can be measured by simply isolating the radar outside the container.
6. Adopting advanced microprocessor and unique EchoDiscovery echo processing technology. Radar level gauge can be applied to various complicated working conditions.
7. Adopting pulse working mode, the transmitting power of the radar level meter is extremely low. It is installed in various metal and non-metal containers. It is not harmful to the human body and the environment.

Extended reading: Radar Oil Tank Level Sensor

Featured Level Measurement Devices for Corrosive Liquids

Extended reading: FMCW Radar Level Transmitter 120GHz

Sino-Inst offers over 10 Radar Level Sensor for Corrosive Liquids level measurement. About 50% of these are Radar level meters, 40% is the tank level sensor.

A wide variety of Radar Level Sensors for Corrosive Liquids are available to you, such as free samples, paid samples.

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

Radar level sensor is the perfect choice for non-contact liquid level measurement. Suitable for sewage level measurement; low volatile acid and alkali level measurement; slurry level measurement.

Features of SIRD-801 Radar Level Sensor

• The hardware system uses advanced microprocessors and embedded system processing software. The signal algorithm processing integrates advanced Echo-capture signal processing technology. This makes the product applicable to various complex industrial plant conditions.
• The “empty tank pretreatment” technology enables the instrument to correctly identify effective echoes and obtain correct measurement results even in the presence of multiple false echo interference.
• Not affected by various complicated working conditions. Such as strong surface fluctuations, foam, moisture and dust interference.

Specifications of SIRD-801 Radar Level Sensor

Applicable medium:	liquid, slightly corrosive liquid
Application:	Sewage level measurement; Low volatile acid-base level measurement; Slurry level measurement
Explosion-proof certification:	Exia IIC T6 Ga/ Exd IIC T6 Gb
Measuring range:	20m
Antenna:	Rod antenna (PP/PTFE)
Frequency:	6 GHz
Process temperature:	(-40～130)℃
Measurement accuracy:	±10mm
Process pressure:	(-0.1～0.3)MPa
Signal output:	(4～20)mA/HART
On-site display:	four LCD programmable
Power supply:	two-wire system (DC24V) four-wire system (DC24V/AC220V)
Repeatability:	± 1mm
Housing:	aluminum single cavity/aluminum double cavity/plastic/stainless steel single cavity
Process connection:	flange (optional)/thread

Radar Level Sensor’s Applications

• Power plants: coal piles, raw coal bins, fuel bins, reservoirs, waste gas purification tanks, bin pumps, ash storage, etc.
• Oilfield: crude oil or product oil storage tanks, three-phase separators, sedimentation tanks, sewage tanks (pools), drilling mud tanks, etc.
• Petrochemical: distillation tower, concentration tank, liquefied gas tank, ammonia tank, steam drum, oil refinery tank, asphalt tank, etc.
• Chemical industry: distillation tower, raw material and intermediate silo, reaction tank, ammonia tank, toxic liquid tank, solid silo, separator, etc.
• Metallurgy: ore silo, ore crusher, raw material silo, auxiliary silo, blast furnace, alumina powder silo, electrolytic cell buffer tank, etc.
• Cement: stone silos, raw meal silos, cement silos, coal powder silos, slag storage silos, etc.
• Water and water treatment: reservoirs, sewage tanks, water treatment tanks, sedimentation tanks, digestion towers, etc.
• Papermaking: raw material warehouse, storage tower, drying drum, etc.
• Others: food, pharmaceuticals, environmental protection, shipbuilding, etc.

Extended reading: Radar Level Meter for Corrosive Liquids

Radar Level Sensor Working Principle

A low-frequency radar level meter is a 6GHz radar level measurement product. It uses an advanced microprocessor. The low-frequency radar has a long emission wavelength, and when encountering obstacles, it can cause diffraction to bypass the obstacles. Then, through optimized echo processing technology, false echo processing technology, and software digital processing technology, the true level is calculated.

The antenna types and process connections are diverse, which can be applied to various working conditions and application schemes. There are more unique application schemes for temperature, pressure and small dielectric constant. At the same time, it integrates HART communication technology and a modular digital display module. When the product is in application, the debugging scheme is diverse and the debugging is simple.

Antenna system to launch and microwave receiving energy is very low, very short pulse. Radar waves travel with the speed of light.  The running time can be through the electronic components are converted into a signal. Measurement of this special time extension method can realize stable, accurate in a very short period of time.

Even if the condition is very complex, the presence of false echo, with the latest micro-processing technology and debugging software also can analyze the level echo accurately.

Microwave antenna to receive the reflected pulse and transmitted to the electronic circuit.

A microprocessor to signal to process, to identify the micropulse generated on the material surface echo.

Echo recognition is completed by the pulse system, the accuracy can reach millimeter level.

From the material surface distance between D and T pulse is proportional to the time travel:

D=C×T/2

Where C is the speed of light

Because of the air tank is a known distance E, L:

L=E-D

By setting the empty tank height E (= zero), the full height of F (= full scale), and some application parameters.

Application parameters automatically make the instrument measure the environment. 4 – 20mA with the corresponding output.

Extended reading: Radar Liquid Level Sensor|Corrosive, steam, volatile liquids

Radar Level Sensor Advantages and Disadvantages

Featured Radar Water Level Sensors

High frequency and low frequency Radar Level Sensor

The microwave frequency used by the microwave level meter has three frequency bands: C band (5.8～6.3GHz), X band (9～10.5GHz), K band (24～26GHz).

The microwave in level measurement is generally directional emission. The beam angle is usually used to quantitatively express the directivity of microwave transmission and reception. The beam angle is related to the antenna type and also to the microwave frequency (wavelength) used.

For the antenna of the same size, a level gauge with a wavelength of 1.2cm and a frequency of 26 GHZ has 6 times higher gain than a level gauge with a wavelength of 3cm and a frequency of 10 GHZ. The antenna gain is a parameter indicating the concentration of radiation from a directional antenna.

The receiving signal diagrams of different frequencies (26/10/6 GHZ), the same antenna, dielectric constant and distance increase are as follows:

Extended reading: Radar Non Contact Water Level Sensor

The total beam width of the radar level gauge is inversely proportional to the frequency of the device. Therefore, for an antenna of the same diameter, if the frequency of the radar level gauge is increased, the beam width will be lower than that of a lower frequency device. The narrow beam minimizes the influence of the nozzle, tank wall and interference.

At the same time, the measurement range of the radar level gauge is also affected by factors such as frequency, antenna size, dielectric constant of the liquid, and process conditions.

The application difference between high frequency and low frequency of radar level sensor.

Low-frequency radar level gauges are preferred when measuring steam, foam, and condensate. In most other applications, high-frequency radar level gauges are preferred for ease of installation.

1. The lower frequency reduces the sensitivity to steam, foam and antenna contamination. The low-frequency radar has a wider wave speed angle. It can better deal with the problems of steam, dust, condensation, pollution and turbulent surfaces.
2. The higher frequency minimizes the impact on the nozzle, tank wall and interference.

Of course, in addition to radar level sensors, ultrasonic level sensors are also a good choice for non-contact level measurement.

Related Products

Related Blogs

Sino-Inst offers over 10 Radar Level Sensors for level measurement. At best price. About 50% of these are Radar level meters, 40% is the tank level sensor.

A wide variety of Radar Level Sensors options are available to you, such as free samples, paid samples.

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

Non contact water level sensor refers to the radar water level sensor. Radar Water Level Sensor is suitable for water level monitoring of lakes, rivers, reservoirs, open channels, and tidal water levels.

Radar Non Contact Water Level Sensor for water level monitoring installation

Radar Non-Contact Water Level Sensor is a high-precision non-contact water level measuring instrument, no logging is required. It is easy to install and can directly measure the water level of natural rivers.

Radar Non Contact Water Level Sensor field comparison test application test, analyze the accumulated measurement data and comparison test results. In order to expand the test results, provide a basis for the selection of water level gauges, and at the same time improve the water level measurement and reporting conditions of the hydrological station on the upper reaches of the Yellow River.

Let me introduce to you the installation diagram of Radar Non Contact Water Level Sensor.

Preparation and inspection before installation;

Please pay attention to the following matters to ensure that the meter can be installed correctly;

Please reserve enough space for installation;

Please avoid installation situations with strong vibration;

Please see the installation diagram description and installation location of the radar water level gauge below:

When a radar antenna emits microwave pulses, it has a certain emission angle.

There should be no obstacles from the lower edge of the antenna to the surface of the measured medium, and in the area radiated by the microwave beam.

Therefore, shielding facilities should be avoided as much as possible during installation, and “false echo learning” must be carried out when necessary.

Also pay attention when installing the instrument: the highest liquid level must not enter the measurement blind zone. The meter must be connected to the ground, and lightning protection measures should be added. Outdoor shading and rainproof measures should be taken.

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.

If you need to purchase liquid level gauge for CO2 Cylinders, you may like:

CO2 Cylinder | Portable Liquid Level Gauge

Procurement Guide: Ultrasonic liquid level sensors

Non Contact Capacitive Liquid Level Sensor

There are three commonly used non-contact liquid level sensors, namely capacitive liquid level sensors, ultrasonic liquid level sensors, and separate photoelectric liquid level sensors.

The non-contact liquid level sensor means that the liquid level can be detected without contacting the liquid. With this advantage, the application field of the non-contact liquid level sensor has been greatly expanded.

The capacitive liquid level sensor can detect the liquid level by attaching it to the container, so the installation process is simple. Capacitive liquid level sensors are mostly used in the field of home appliances because the positioning is due to the small size and low price of the sensor.

If the capacitive liquid level sensor is installed on the body, the container can be moved arbitrarily. For example, the capacitive liquid level sensor detects the low liquid level of the aromatherapy machine. When the sensor detects that the fragrance in the aroma diffuser bottle is only 20ml, it will give a signal to remind you. After the device receives the signal, it turns on the buzzer to alarm or light up to remind. At this time, the user can take the bottle to add liquid, or directly replace another bottle with a new one.

The disadvantage of capacitive liquid level sensors is that they can only be used on non-metallic containers. And it cannot detect liquids with low conductivity, such as diesel gasoline. It is also unable to detect high-temperature liquids. High-temperature liquid will cause the sensor to fail.

Non contact type water level sensor

Non contact level sensor is when the liquid level gauge measures the liquid level, the sensor does not need to touch the measured medium.

Common non contact level sensors include ultrasonic and radar.

Extended reading: Amazing Solutions for Continuous Liquid Level Measurement

Featured Non Contact Tank Level Sensors

More Water Level Sensors

Sino-Inst offers a variety of water level sensors for a wide range of conditions. Our sensors are ideally suited for monitoring water levels in streams, dams and reservoirs. Our water level sensor products include:

• Submersible Pressure Transducers
• Radar Level Sensors
• Magnetostrictive Level Sensors
• Pressure Transducers
• Ultrasonic water level sensor

Sino-Inst offers over 10 Radar Non Contact Water Level Sensors for level measurement. About 50% of these are Radar level meters, 40% is the tank level sensor.

A wide variety of Radar Non Contact Water Level Sensor for level measurement options are available to you, such as free samples, paid samples.

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

Radar water level sensor is the ideal solution for measuring the water level in dams, ponds, rivers, reservoirs, etc.

Features of SIRD-908 Radar Water Level Sensor

• All-weather work. 26GHz microwave reflection principle, strong anti-interference ability.
• The sensor has a reliable accuracy of 3 mm.
• No mechanical wear, non-contact measurement. Long life and easy maintenance
• The measurement has nothing to do with water quality. It is not affected by floating objects such as floating ice
• No need for wave wells. No effect on water flow
• Unattended continuous online collection
• Ultra-low power consumption. Support solar power supply
• It can be used for wireless network transmission. No need to excavate cable trench. It has no impact on the construction of channel lining and tree planting.
• Low cost. Simple installation and maintenance. Long life.

Specifications of SIRD-908 Radar Water Level Sensor

Application：	Rivers, lakes, shallows
Measuring Range：	30 meters
Process Connection：	Thread G1½ʺ A / bracket / flange
Process  Temperature：	-40～100℃
Process Pressure：	Atmospheric
Accuracy：	±3mm
Protection Grade：	IP67 / IP65
Frequency Range：	26GHz
Supply：	DC (6-24V) / four wire DC 24V / two wire
Signal Output：	RS485/Modbus protocol 4~20mA/Hart two wires
Housing:	Aluminum single cavity / aluminum dual cavity / plastic / stainless steel single cavity
Explosion-proof Grade：	Optional

Radar Water Level Sensor working principle

Measuring principle:

Micro-power microwave pulses are emitted from the radar antenna and travel through space at the speed of light. It is reflected by the object to be measured and received by the radar.

The time difference between the transmission and reception of the pulse signal is proportional to the distance from the radar antenna to the measured object. The propagation speed of electromagnetic signals in space is the speed of light. Usually when measuring the distance, the time difference between the transmitted pulse and the received pulse is very short and only on the order of nanoseconds.

Conventional technology is difficult to accurately measure this time.

SIRD-908 Radar Water Level Sensor uses an advanced equivalent sampling method to accurately measure the original nanosecond time interval. So as to realize the accurate measurement of distance.

Transmit-reflect-receive:

The extremely tiny 26GHz radar signal is emitted in the form of short pulses from the antenna end of the radar level gauge.
The radar pulse is reflected by the sensor environment and the surface of the object and received by the antenna as a radar echo.
The rotation period of the radar pulse from emission to reception is proportional to the distance, that is, the level.

◆ Input
The antenna receives the reflected microwave pulse and transmits it to the electronic circuit. The microprocessor processes this signal. Identify the echo generated by the microwave pulse on the surface of the material.
The correct echo signal identification is completed by intelligent software, and the accuracy can reach millimeter level. The distance D from the surface of the material is proportional to the time travel T of the pulse:
D=C×T/2
Where C is the distance of the empty tank at the speed of light E is known, then the distance of the level L is: L=E-D

◆ Output
It is set by entering the empty tank height E (=zero point), the full tank height F (=full scale) and some application parameters. Application parameters will automatically adapt the meter to the measurement environment. Corresponds to 4-20mA output.

Extended reading: Amazing Solutions for Continuous Liquid Level Measurement

Radar Water Level Sensor Applications

• River water level, automatic monitoring of open channel water level, water resource monitoring and water level measurement;
• In front of the reservoir dam, the tail water level monitoring and surge tower (well) water level monitoring below the dam;
• Automatic tide level monitoring system, urban water supply and sewage level monitoring system;
• Mountain flood warning system water level monitoring, water level monitoring of small and medium rivers.

Extended reading: Capacitive water level sensor

Extended Reading: 3 inch (3″) Water Flow Meter

More Water Level Sensors

Sino-Inst offers a variety of water level sensors for a wide range of conditions. Our sensors are ideally suited for monitoring water levels in streams, dams and reservoirs. Our water level sensor products include:

• Submersible Pressure Transducers
• Radar Level Sensors
• Magnetostrictive Level Sensors
• Pressure Transducers
• Ultrasonic water level sensor

Related Blogs

Sino-Inst offers over 10 Radar Water Level Sensors for level measurement. About 50% of these are Radar level meters, 40% is the tank level sensor.

A wide variety of Radar Water Level Sensor for level measurement options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Radar Water Level Sensor instrumentation, located in China.