AOUL65 Horn Antenna Radar

AOUL65 Horn Antenna Radar

Emission Angle: 6°, 8°, 9°

Signal Strength: Strong, Medium, Weak

Miniature Flange: DN125, DN100, DN80

Moisture-sensitive, condensation water

Among various types of antennas, the signal strength is relatively strong.

Solid measurement range reduced by half

Dust measurement range reduced by two-thirds

As follows:

Test solid 5 meters, 5*2=10 meters

If the range is selected to be 30 meters, the factory standard is marked as 5 meters; if 7 meters is chosen, there might be on-site risks.

12-meter dust measurement, 12 x 3 = 36 meters

Select the model with a range of 70 meters.

26 GHz

Measurement Distance: 70,307 meters

Resolution: 1mm

Accuracy ±10mm

±5mm tolerance

  0.6m Blind Spot

Measurement interval ≥ 1s, based on set parameters

Response time ≥ 5s, based on set parameters

Beam Angle < 8°

Dimensions (excluding flange): 120*94*320mm

Flange sizes: DN50, DN80, DN100, DN150

Process Temperature -40℃ to 85℃

Process pressure: Atmospheric pressure

Relative humidity < 95% RH

Antenna Material: PTFE

Power supply: 16～36VDC, two-wire or four-wire system (HART); 9～24VDC, four-wire system (RS485)

Signal Output HART/4-20mA/RS485

Fault output does not change/22mA/20.5mA/4mA

500Ω high load

Communication HART/RS485

Live Display LCD Panel

Ingress Protection (IP) 67

Cable entry M20x1.5

Recommend AWG 18 or 0.75mm² cable

External measurement suitable for complex process conditions of various containers, tanks, and materials storage, unaffected by changes in the physical properties of the medium being measured. Two-wire technology, suitable for explosion-proof environments, non-contact and continuous measurement pulse-type level gauge with a large measuring distance of up to 70 meters.

I. Features and Advantages:

Two-wire technology is an excellent substitute for differential pressure gauges, magnetostrictive sensors, radio frequency admittance, and magnetic flip-flop gauges.

Not affected by environmental factors such as pressure changes, vacuum, temperature variations, inert gases, dust, steam, etc.

Easy to install, sturdy and durable, maintenance-free

HART Communication Protocol and Foundation Fieldbus Protocol, with simple calibration and easy on-site calibration operations via digital LCD display, simple configuration settings and programming achieved through the software AOPF.

Highly sensitive in measurement, with rapid refresh speed.

Suited for high-temperature operating conditions, with process temperatures up to 200°C, and can reach 350°C when using high-temperature extended antennas.

Section 2: Application Medium:

The AOUL60 series radar level gauge is suitable for non-contact continuous measurement of liquid, slurry, and granular material levels, applicable to environments with significant temperature and pressure fluctuations, as well as those with inert gases and volatile substances.

Utilizes microwave pulse measurement methods and operates normally within the industrial frequency band. The beam energy is low, allowing for installation in various metal and non-metal containers or pipes without harm to humans or the environment.

III. Measurement Principle

Low-power short microwave pulses are emitted and received through an antenna system. Radar waves travel at the speed of light. Operating time can be converted into level signals by electronic components. A special time extension method ensures stable and effective measurements in a short period.

Even in complex operating conditions where false echoes are present, the new microprocessing technology and debugging software can accurately analyze the echo of the material level.

Input

The antenna receives reflected microwave pulses and transmits them to the electronic circuit. The microprocessor processes this signal, identifying the echoes generated by microwave pulses on the material surface. Accurate echo signal identification is performed by intelligent software, achieving precision down to the millimeter level. The distance D from the material surface is proportional to the pulse's travel time T:

    D=C×T/2

Where C is the speed of light.

Since the distance E to the empty cans is known, the level L is:

    L=E-D

Output

    Set by entering the empty tank height E (= zero point), full tank height F (= full scale), and some application parameters. The application parameters will automatically adjust the instrument to the measurement environment. Corresponds to a 4-20mA output.

Radar level gauge output calculation:

At the factory, the default mode is height measurement.

50-meter range, 0.6-meter blind spot

Then, there are:

At material level 0, the indicator shows: 50 meters, output 4 mA

At 49.4 meters, gauge shows: 0.6 meters, output 20 mA

Milliamp output calculation formula:

Ex Works Default

Milliamp Output = 20 - (Display Value - Dead Zone) / (Range - Dead Zone) * 16

Header Display = Range - Material Height

30-meter range, 0.6-meter blind spot

Then, there are:

At material level 10, the gauge displays: 20 meters.

Output: 9.442 mA

    30-10=20

    20-（20-0.6）/(30-0.6)  *16=9.442

    At 20 meters, the gauge reads: 10 meters.

Output: 14.884 mA

    30-20=10

    20-（10-0.6）/(30-0.6)  *16=14.884

30-meter range, 0.6-meter blind spot

How do I set up the DCS or instrument to display it?

4mA corresponds to 0mm material height

20 milliamperes corresponds to the material height of (range - dead zone)

30 - 0.6 = 29.6 meters

Distance display is referenced to the installed benchmark point.

Milliampere output is referenced to the blind area.

This is where the radar differs from other products and has become a customary practice.

Above image shows an antenna with a protective hood.

Select dustproof antenna

Greatly enhance dust-proof performance

Increase dustproof horn antenna

Signal will weaken

Compared to standard horn antennas

The range must be reduced by 25%.

Of course, in addition to dustproof antennas.

Resolve dust issues by choosing models with a blowing device.

In-situ, the blow-off method is preferred if it can be conditionally utilized, as this method does not weaken the signal.