Very short microwave pulses of very low energy are transmitted and received through an antenna system. The radar wave travels at the speed of light. The running time can be converted into a level signal by means of electronic components. A special time-stretching method ensures stable and accurate measurements in a very short time. Even in the case of complex conditions and spurious echoes, the level echoes can be accurately analyzed using microprocessor technology and commissioning software.
The antenna receives the reflected microwave pulses and transmits them to the electronics. The microprocessor processes this signal and identifies the echoes generated by the micropulses on the material surface. The correct identification of the echo signal is done by the pulse software with an accuracy of millimeters.
The distance D from the material surface is proportional to the time travel T of the pulse: D=C×T/2; where C is the speed of light. Since the distance E from the empty tank is known, the level L is: L = E - D.
It is set by entering the empty tank height E (=zero), full tank height F (=full range) and some application parameters, which will automatically adapt the instrument to the measurement environment. Corresponds to 4-20mA output.
This instrument fully meets the requirements of protection class IP66/67.
Please make sure that the cable sealing head is waterproof. As shown
How to ensure that the installation meets the requirements of IP67:
Please make sure that the sealing head is not damaged.
Please ensure that the cable is not damaged.
Please ensure that the cable used meets the requirements of the electrical connection specification.
Before entering the electrical connection, bend the cable downwards to ensure that
water does not flow into the housing, see ①
Please tighten the cable sealing head, see ②
Please plug the unused electrical connections with blind plugs, see ③
Applicable medium: liquid, slightly corrosive liquid
Applications: sewage level measurement; acid and alkali level measurement with
small volatility; 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 to 130)°C
Measurement accuracy: ±10mm
Process pressure: (-0.1 to 0.3) MPa
Signal output: (4 to 20)mA/HART
Field display: four-bit LCD programmable
Power supply: two-wire system (DC24V) four-wire system (DC24V/AC220V)
Repeatability: ± 1mm
Housing: aluminum single chamber/aluminum double chamber/plastic/stainless steel single chamber
Process connection: flange(optional)/thread
Recommended location (2), the tank wall to the outer wall of the installation short pipe should meet the following requirements: the best distance from the tank wall is 1/4 or 1/6 of the tank diameter, the minimum installation distance from the tank wall is 1/10 of the measurement range. for example: 10m level tank, the minimum installation distance from the tank wall should be 1m.
● Cannot be installed above the inlet (4)
● It cannot be installed in the center (3). If it is installed in the center, multiple false echoes will be generated and the interference echoes will cause the real signal to be lost.
● If the distance between the instrument and the tank wall cannot be maintained, the medium on the tank wall will adhere to cause false echoes, and false echo storage should be performed when commissioning the instrument.
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Installation of the conical tank
The conical tank has a flat top and can be mounted right in the middle of the top of the tank, which ensures measurement to the bottom of the cone.
Storage tanks with piles of material
When there is a pile of material, the antenna should be aligned vertically with the material surface. If the material surface is not flat and the pile angle is large, you must use the universal flange to adjust the horn angle so that the horn is aligned with the material surface as much as possible. (Due to the inclined solid surface will cause the echo attenuation and even loss of signal problem)
Installation instructions inside the tank
Within the signal beam, the following installations should be avoided: e.g. (1): limit switches, temperature sensors, etc.
Symmetrical installations such as (2): vacuum rings, heating coils, baffles, etc.
If there are (1) (2) interfering objects inside the tank, a wave guide tube should be used for measurement.
Please Send Us your Application details
Measuring range , medium, Installation method (flange, thread), Pressure range, Remote transmitter, Level alarm switch
Our technical team will check your specifications and make a best solution for you.
More Model available for all appication, different termperture and pressure!
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