Radar level gauges are an essential part of many industrial operations, serving as the invisible sentinels that accurately measure the levels of various substances. These sophisticated devices use cutting-edge radar technology to make precise, non-contact measurements. Capable of working seamlessly under a variety of challenging conditions, radar level gauges offer undeniable benefits in accuracy, reliability, and versatility.

Radar Level Gauge

Featured Radar Level Gauge Selection

Radar Level Gauge 11s
Radar Level Gauge 11S
  • Measuring medium: Liquid
  • Measuring range: 0.1m~10m
  • Process connection: Thread G¾”A / ¾”NPT;Flange ≥DN25
  • Process temperature: -40~100℃
  • Process pressure: -0.1~1.6 MPa
  • Antenna size: 21mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±5mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle:14°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol
Radar Level Gauge 11
Radar Level Gauge 11
  • Measuring medium: Liquid
  • Measuring range: 0.1m~30m
  • Process connection: Thread G½”A /1 ½”NPT; Flange ≥DN40
  • Process temperature: -40~80℃/ -40~100℃
  • Process pressure: -0.1~0.3 MPa
  • Antenna size:32mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±2mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle: 8°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART protocol
Radar Level Gauge 12
Radar Level Gauge 12
  • Measuring medium: Liquid
  • Measuring range: 0.1m~30m
  • Process connection:Flange ≥DN40
  • Process temperature: -40~120℃
  • Process pressure: -0.1~1.6 MPa
  • Antenna size:32mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±2mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle: 8°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART protocol
Radar Level Gauge 13
Radar Level Gauge 13
  • Measuring medium: Liquid
  • Measuring range: 0.2m~30m/0.3~150m
  • Process connection:Flange ≥DN80 /Thread G3 A
  • Process temperature:
    • -40~150℃
    • -40-130℃( Athread)
  • Process pressure: -0.1~1.0 MPa
  • Antenna size:76mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±2mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle: 3°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol
Radar Level Gauge 13s
Radar Level Gauge 13S
  • Measuring medium: Liquid
  • Measuring range: 0.2m~30m/0.3~150m
  • Process connection:Flange ≥DN80 /gantry frame
  • Process temperature: -40~80℃
  • Process pressure: -0.1~0.3 MPa
  • Antenna size:76mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±2mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle: 3°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol
Radar Level Gauge 13G
Radar Level Gauge 13G
  • Measuring medium: Liquid
  • Measuring range: 0.1m~30m/0.3m~150m
  • Process connection:Flange ≥DN80
  • Process temperature: -40~280℃
  • Process pressure: -0.1~2.5 MPa
  • Antenna size:76mm lens antenna
  • Antenna material: PEEK
  • Accuracy: ±2mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle:  6°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol
Radar Level Gauge 14
Radar Level Gauge 14
  • Measuring medium: Liquid
  • Measuring range: 0.1m~30m
  • Process connection:Flange ≥DN50
  • Process temperature: -40~200℃
  • Process pressure: -0.1~2.5 MPa
  • Antenna size:44mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±2mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle:  6°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol
Radar Level Gauge 15
Radar Level Gauge 15
  • Measuring medium: Liquid
  • Measuring range: 0.3m~30m
  • Process connection:Flange ≥DN80
  • Process temperature: -40~200℃
  • Process pressure: -0.1~2.5 MPa
  • Antenna size:76mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±2mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle:  3°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol
Radar Level Gauge 21
Radar Level Gauge 21
  • Measuring medium: Solid
  • Measuring range: 0.1m~30m/0.3~150m
  • Process connection:Flange ≥DN80
  • Process temperature: -40~150℃/-40~200℃
  • Process pressure: -0.1~0.3 MPa
  • Antenna size:76mm lens antenna
  • Antenna material: PTFE
  • Accuracy: ±5mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle:  3°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol
Radar Level Gauge 21S
Radar Level Gauge 21S
  • Measuring medium: Solid
  • Measuring range: 0.1m~30m/ 0.3m~150m
  • Process connection:Flange ≥DN80
  • Process temperature: -40~80℃
  • Process pressure: -0.1~0.3 MPa
  • Antenna size:76mm lens antenna
  • Antenna material: PE
  • Accuracy: ±5mm
  • Protection level: IP67
  • Center frequency: 80GHz
  • Launch angle:  3°
  • Power source:
    • Two-wire system/DC24V
    • Four-wire system/AC220V
    • Six-wire system/DC12-24V
  • Shell: Aluminum/Plastic/Stainless steel
  • Signal output:
    • Two-wire system/4…20mA/HART protocol
    • Four-wire system/4…20mA/HART protocol
    • Six-wire system/4…20mA/HART Protocol

Radar Level Gauges Measurement Technology

The general principle of the FM continuous wave radar level gauge is that the radar emits electromagnetic waves on the top of the tank, and the electromagnetic waves are received by the radar after being reflected by the medium.

The frequency difference δf between the received signal and the transmitted signal is proportional to the distance R from the surface of the medium: R=C (speed)*δf (frequency difference)/2/K (frequency modulation slope).

Because the speed of light C and the frequency modulation slope K are known, the frequency difference δf can be estimated to obtain the distance R from the radar installation position to the material surface. And then through the known total height of the tank, subtract the spatial distance from the radar to the material surface (referred to as Empty height) to get the height of the material level.

80GHZ-Radar-Level-Transmitter-Measurement-Principle

Advantages of Using Radar Level Gauges

  1. Millimeter-wave radar, with a measurement accuracy of up to ±1mm, and a minimum blind area of 0.1m.
  2. The smaller antenna size satisfies the measurement of more working conditions.
  3. A variety of lens antennas, smaller launch angle, more concentrated energy, stronger echo signal, under the same industrial and mining conditions, compared to
    Other radar products have higher reliability.
  4. With stronger penetrability, it can be used normally even if there is adhesion and condensation.
  5. The dynamic signal range is larger, and the measurement of low dielectric constant medium is more stable.
  6. 6. A variety of measurement modes, the radar reaction time in the fast measurement mode is less than 1S.

Applications of Radar Level Gauges Across Industries

Applications of Radar Level Gauges Across Industries

Radar Liquid Level Sensors

Radar liquid level sensors are special tools that use radio waves to measure how much liquid is in a tank…

Selection List

When choosing a radar level gauge, several factors need careful consideration to ensure that the gauge suits your specific requirements. Here’s a list to guide your selection process:

  • Nature of the Substance: The physical characteristics of the substance to be measured play a crucial role. Consider whether the substance is liquid or solid, its reflective properties, its density, and whether it is corrosive or otherwise hazardous.
  • Environmental Conditions: The conditions in which the gauge will operate can significantly affect its performance. Important conditions to consider include temperature, pressure, humidity, and the presence of dust or other particulates.
  • Installation Requirements: Gauge installation requirements, such as the size and shape of the tank or container, the presence of obstructions, and the available mounting options, can influence the choice of radar level gauge.
  • Range and Accuracy: Ensure the gauge has a measurement range that suits your needs. Also, consider the level of accuracy required for your operation.
  • Maintenance and Durability: Ideally, the gauge should require minimal maintenance and be durable enough to withstand your operating conditions for a reasonable period.
  • Cost: Finally, consider your budget. While higher-end models may offer advanced features and better performance, there might be cost-effective options that meet your requirements adequately.

Selecting the right radar sensor requires careful evaluation of your specific needs based on the sensor’s capabilities. Here we take the selection data of one of the radar level gauges FMW21/21s as an example.

 21/21s
ID:
License
P    Standard  (Non-explosion-proof)
I     Intrinsically safe(Exia IIC T6 Ga)
D    Flameproof(Ex db IIC T6 Gb)                                                                 
Process Connection / Material
1     Flange≥DN80              
X     Special customization
Antenna Type / Material
A  76mm Lens antenna / With purge port / PE
B  76mm Lens antenna / With purge port / PTFE
Sealing / process temperature
A    FKM/(-40-80℃)
B    FKM/(-40-150℃)
C    FKM/(-40-200℃)                              
Y     Special customization
he  Electronic Unit
1  (4~20)mA/HART protocol 24VDC   2-wire 
2  (4~20)mA/HART protocol 220VAC   4-wire   
3  (4~20)mA+RS485/Modbus protocol 12- 24VDC   6-wire                             
Shell material/protection grade
A   Cast aluminum / Single chamber / IP67
B   Cast aluminum / Double chamber / IP67
C   Cast aluminum / Double cavity side view / IP67
D   Plastic ABS / Single chamber / IP65
E   Stainless steel 304 / Single chamber / IP67
F    Stainless steel 304 / Double chamber / IP67
Cable Line
M   M20×l. 5
N    ½″ NPTX     Special customization  
Display programming
A    Programming with display
B    With display programming/ Bluetooth communication
C    Without          

Flange option / material

Specification / Code / MaterialPP UniversalPTFE UniversalStainless steel304 UniversalStainless steel316L Universal
DN80P4F4G4S4
DN100P5F5G5S5
DN125P6F6G6S6
DN150P7F7G7S7
DN200P8F8G8S8

More Featured Radar Level Meters

FAQ

A radar level gauge is an instrument used in various industries to measure the level of materials without making physical contact. It utilizes radar wave technology, emitting waves that bounce off the material surface and return to the gauge, enabling it to calculate the material’s level accurately.

Radar level measurement is known for its exceptional accuracy. While the exact degree of accuracy can vary depending on the specific model and operating conditions, most radar level gauges can achieve accuracy within a few millimeters.

There are mainly two types of radar level gauges: guided wave radar (GWR) and non-contact (or free-space) radar. GWR uses a probe to guide the radar waves to the material surface, while non-contact radar emits waves freely towards the material. Each type has its unique advantages and is suitable for different applications.

A radar level meter works by emitting radar waves towards the surface of the material being measured. These waves bounce back off the surface and are captured by the meter. By calculating the time it takes for the waves to travel to the surface and back, the meter can determine the level of the material accurately.

In conclusion, radar level gauges are a sophisticated and highly reliable tool for non-contact level measurement across diverse industries.

At Sino-Inst, we understand the vital role that accurate level measurement plays in your operations. We’re an experienced manufacturer and supplier of radar level gauges.

Whether you’re looking for standard options or require customized solutions to meet unique requirements, our team is ready to assist. We’re committed to delivering high-quality products that contribute to the efficiency and success of your business.

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