The working frequency band of Radar Tank Level Sensor is 24G~26GHZ. Radar Tank Level Sensor is a non-contact radar transmitter based on the principle of FM continuous wave.
SIRD-902 Drop antenna Radar Tank Level Sensor is an integral PTFE drop antenna type radar level sensor. It is used to measure the distance and level of strongly corrosive liquids, pastes and solid media. Compared with the radar level sensor that adopts the pulse measurement principle, it can measure stably, reliably and with high precision even in dusty, foamy, and highly corrosive applications. Compared with pulse radar or GWR, there are many features they don’t have.
Features of SIRD-902 Drop Antenna Radar Tank Level Sensor
- Non-contact measurement;
- 4-20mA standard output;
- HART bus communication;
- K band, high precision, high reliability;
- Solve the measurement problems of liquid, slurry, paste and other stirring, foam or liquid level fluctuation and violent stirring;
- The drop-type antenna can be used in harsh working conditions such as severe condensation or strong corrosive media.
Specifications of SIRD-902 Drop Antenna Radar Tank Level Sensor
|Application：||Temperature, pressure, slightly corrosive liquid;|
Storage container, process container or agitating occasion with severe fluctuation; occasions with severe condensation or strong corrosive medium
|Measuring Range：||30 meters|
|Process Connection：||Thread, flange|
|Process Temperature：||-40～130℃(standard type) / |
|Supply：||Two-wire system (DC24V) / Four-wire system (DC24V/AC220V)|
|Signal Output：||Exia ⅡC T6 Ga / Exd IIC T6 Gb|
|Outer Covering：||Aluminum |
Single Chamber / Aluminum
Dual Chamber / Plastic / Stainless Steel Single Chamber
|Explosion-proof Grade：||4…20mA/HART (two-wire/four-wire) / RS485 Mod bus|
|Antenna Material||Stainless Steel / PTFE|
Radar Antenna Types
- Horn antenna for radar level gauge:
26G high-frequency radar-type level measuring instrument. Output 4-20mA analog signal. The maximum measuring distance can reach 70 meters. This antenna has been further optimized. The new and fast microprocessor can perform higher-speed signal analysis and processing. The instrument can be used for particularly complex measurement conditions in reactors or solid silos.
- Rod antenna for radar level gauge:
Suitable for measuring liquids. Corrosive media. The maximum measuring distance can reach 20 meters. The antenna is further optimized. The new and fast microprocessor can perform higher rate signal analysis and processing. The instrument can be used for very complex measurement conditions in the reactor or solid silo.
- Parabolic antenna for radar level gauge:
This is a new type of antenna launched in China. It is mostly used in high-frequency transmitting radars. It is especially suitable for measuring targets and avoiding obstacles. 26G high frequency radar type level measuring instrument. Output 4~20mA analog signal. The maximum measuring distance can reach 70 meters. The antenna is further optimized. The new and fast microprocessor can perform higher rate signal analysis and processing. The instrument can be used for very complex measurement conditions in the reactor or solid silo.
- Radar level gauge casing antenna:
The casing has a focusing effect on radar waves. Therefore, when the dielectric constant is small or the liquid level produces continuous eddy currents or the device in the container causes false reflections, this type of instrument is suitable. But the measured medium is required to have good fluidity. It is not easy to hang the material.
- Lens radar liquid level antenna:
Transmits narrow microwave pulses and transmits downward through the antenna. The maximum measuring distance can reach 70 meters. The antenna is further optimized. The new and fast microprocessor can carry out higher-speed signal analysis and processing. The instrument can be used for some complex measurement conditions such as reactors and solid silos.
The above content is for your reference only. When choosing the antenna of the radar level gauge, you should choose according to the actual needs of the measurement environment.
Extended reading: Magnetostrictive Hydraulic Cylinder Position Sensor
Radar Tank Level Sensor Principle
Frequency Modulated Continuous Wave Technology (FMCW)
The drop-type antenna emits radar waves, which are received by the antenna after being reflected on the surface of the medium. The radar principle used is Frequency Modulated Continuous Wave (FMCW). The frequency modulated continuous wave (FMCW) radar sends out a signal in the high-frequency band. Within its measurement range, the frequency of the radar wave increases linearly (called frequency sweep).
The transmission and reception of radar waves correspond to a time difference t. The distance d between the radar and the surface of the medium conforms to the formula t=2×d/c. Where c is the transmission speed of the radar wave above the surface of the medium, that is, the speed of light.
SIRD-902 Drop Antenna Radar Tank Level Sensor performs signal processing by comparing the frequency difference between the reflected wave and the current transmitted wave. The frequency difference △f is proportional to the distance, and the greater the frequency difference, the greater the distance.
After Fast Fourier Transform (FFT), the frequency difference Δf is converted into a frequency spectrum, and the distance d is calculated from this. The height of the level is calculated by the given tank height.
Extended reading: Radar Level Meter for Corrosive Liquids
Featured Radar Level Sensors
Level Senors for Tank Level Measurement
Tank level senor is a level sensor used to measure the tank level. The liquid level is the level of the liquid in a sealed container (such as a water tank) or an open container (water tank). The instrument that measures the liquid level is called a liquid level sensor, a liquid level gauge or a liquid level transmitter. The liquid level sensor is a kind of level instrument.
Hydrostatic, Ultrasonic, Magnetostrictive, Radar, Differential Pressure are commonly choices for tank level measurement. Liquid level sensors have been around for decades for leak detection or level measurement. Common measured medium are: Water, Fuel, Diesel, Gasoline, diesel, liquefied gas, liquid ammonia, etc.
Read more about: 7 Level Senors for Tank Level Measurement
What are the different types of antenna?
♦ Radar level meter: stainless steel horn antenna. It is more suitable for the site with relatively clean working conditions and no volatile behavior.
♦ Radar level meter: stainless steel horn and PTFE cover antenna. Suitable for working conditions with volatile matter and dust on site.
♦ Radar level meter: all plastic antenna with PTFE cover antenna. Suitable for working conditions with volatile matter, dust and condensation on site.
♦ Radar level meter: stainless steel horn with purge antenna. It is more suitable for working conditions that easily cause pollution to the antenna.
♦ Radar level meter: With extension pipe and radiating pipe, it can be used in ultra-high temperature conditions (such as molten steel). It is more suitable for converters, blast furnace loading positions and raw material warehouses in the metallurgical industry. If the dust in the site is relatively large and there is water vapor in the ore powder, try to use a high-frequency radar level meter when using it.
What are the different types of level sensors?
Common liquid level sensors are:
Float type liquid level sensor, magnetostrictive liquid level sensor,
Capacitive liquid level sensor, resistance liquid level sensor,
Radar level sensor, laser level sensor,
Ultrasonic liquid level sensor, pressure sensor,
Bubble level sensor, isotope level sensor,
Thermodynamic liquid level sensor
There’re 7 main types of level transmitters that Sino-Instroffers. Each type of transmitter works in a different way and makes it useful for different types of processes.
What is radar and its types?
Generally speaking, we have the following two-division methods for the types of radar level sensors.
1. There are two types of radar level sensors: contact and non-contact.
Also known as: Noninvasive or Invasive.
The non-contact type includes pulse radar and continuous frequency modulation. The probe is usually a horn antenna, that is, a tubular antenna, but the diameter of the horn is different, and the length of the horn is different. So it looks like some speakers, and some look like tubes, but they are actually one.
In addition, the contact radar is equipped with a rod antenna, usually called a guided wave radar, which is a pulse radar in principle. You can also learn more about guided wave radar level sensors.
2. In principle, radar level sensors can be divided into three main types: Pulsed. Frequency modulated continuous wave. And guided wave radar.
Non-contact radar is called a radar level sensor, which includes two types of rod antenna and horn.The contact radar level gauge can also be called a guided wave radar level gauge. Including single rod type and single cable type, double cable type, coaxial type, etc., which includes high-frequency and low-frequency radar level gauge.
Extended reading: Radar Liquid Level Sensor|Corrosive, steam, volatile liquids
Which sensor is used to detect water level?
There are many types of water level sensors. Including single flange static pressure / double flange differential pressure water level sensor, float type water level sensor, magnetic water level sensor, input type water level sensor, electric inner float water level sensor, electric float level sensor, capacitive water level sensor, magnetostrictive Water level sensor, servo water level sensor, etc., ultrasonic water level sensor, radar water level sensor, etc. It can be divided into contact type and non-contact type.
Extended reading: Ultrasonic level transmitter for Hazardous Liquids
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 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.
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