SLDL5523 Coaxial Probe Guided Wave Radar

FlexScan coaxial probe guided wave radar transmits high-frequency microwave pulses through detection components (such as steel cables or steel rods). When these pulses encounter the measured medium, they will produce reflection due to the sudden change of dielectric constant, and part of the pulse energy will be reflected back to the radar. The time difference between the transmitted pulse and the reflected pulse is proportional to the distance of the medium.

D=C X T/2

Where C is the speed of light

Since the distance LN of the empty tank is known, the level L is:

L=LN-D

By entering the empty tank height E (=zero point), the full tank height F (=full scale) and some application parameters to set, the application parameters will automatically adapt the coaxial guided wave radar instrument to the measurement environment, corresponding to 4-20mA output.

Note: Reliable measurement of the tank level can only be guaranteed when the material is between the top blind area and the bottom hundred area.

LN: probe length

D: distance

L: level

R: measurement reference point

E: empty mark (zero point)

P: full mark (full scale)

 

Guided wave radar sensor applicable medium: liquid, especially liquid with low dielectric constant and fluctuating steam

Coaxial probe guided wave radar application: environment with complex process conditions of steam and small dielectric constant medium

Measurement range: 6m

Antenna: coaxial tube antenna

Measurement accuracy: ±1mm

Process temperature: (-40～150)℃

Process pressure: (-0.1～4)MPa

Signal output: 4-20mA/HART two-wire/four-wire, Profibus PA, Foundation Fieldbus, Modbus protocol, GPRS/CDMA remote, Bluetooth (optional)

On-site display: LCD liquid crystal display

tdr Radar level transmitter process connection: G1 1/2A/G2A/1 1/2NPT/flange (optional)

 

●Interference optimization

1. Interference echo suppression: The coaxial probe guided wave radar software can suppress interference echoes, thereby achieving ideal measurement results.

2. Bypass pipe and waveguide (only for liquids) For viscosity not more than 500cst, bypass pipe or waveguide can be used to avoid interference.

●Installation of low dielectric constant liquid

For media with dielectric constant greater than 1.3, viscosity ≤500cst and not easy to produce adhesion, the coaxial probe guided wave radar can be installed in the waveguide for measurement. Its characteristics are as follows:

1. Excellent reliability and high precision

2. It can be used for any medium with dielectric constant ≥1.3, and the measurement is not related to the conductivity of the medium

3. Obstacles in the tank and the size of the short pipe do not affect the measurement

●Corrosive medium measurement

If measuring corrosive media, a rod or cable probe can be used with PTFE or PFA sleeves for measurement.

●Corrosive media measurement

1. The rod probe of the tdr radar level transmitter can reach 6 meters. For storage tanks with a measurement distance of more than 6 meters, a 4mm cable probe can be selected

2. The installation and fixing method is the same as the solid powder silo measurement

3. The distance from the tank wall is greater than or equal to 300mm, and the probe must be prevented from contacting the tank wall

4. When selecting the probe length, pay attention to the bottom of the probe being greater than 30mm from the bottom of the tank

5. If there are many obstacles in the tank or it is too close to the probe, a waveguide can be installed for measurement when using a coaxial probe guided wave radar sensor

 

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