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NYRD703 1.8GHz Guided Wave Radar Level Meter
The guided wave radar level meter is a level meter based on the principle of time domain reflection (TDR). The electromagnetic pulse of the radar level gauge propagates along the steel cable or probe at the speed of light. Part of the pulse of the level meter is reflected to form an echo and return to the pulse transmitter along the same path. The distance between the transmitter and the surface of the measured medium is proportional to the propagation time of the pulse during that period, and the liquid level height is calculated.
Radar Level Meter Technical Parameter
| Typical application | Liquids, Low dielectric constant liquid |
| Antenna material | Flexible cable/304/PTFE (optional) |
| Measuring range | 0~20m(cable),0~6m |
| Accuracy | ±1mm |
| Power supply | 24 VDC(Two-wire,Four- wire) |
| Medium temperature | -40～+130℃ |
| Pressure | e -0.1～4.0MPa |
| Process connection | Thread, Flange (optional) |
| Protection class | IP67 |
| Explosion-proof grade | ExiaⅡCT6(optional) |
| Signal output | 4...20mA/HART/RS485/Modbus... |
※ Note: Products can be customized according to the specific requirements of users!
Radar Level Meter Operating Principle
The high-frequency microwave pulse emitted by the guided wave radar propagates along the detection component (steel cable or steel rod), and when it encounters the measured medium, due to the sudden change of the dielectric constant, it causes reflection, and a part of the pulse energy is reflected back. The time interval between the transmitted pulse and the reflected pulse is proportional to the distance of the measured medium.
◎ Enter
Guided wave radar is a measuring instrument based on the principle
of time travel. The radar wave runs at the speed of light, and the
running time can be converted into a level signal through
electronic components. The probe emits high-frequency pulses and
propagates along the cable or rod probe. When the pulses meet the
surface of the material, they are reflected back and received by
the receiver in the instrument, and the distance signal is
converted into a level signal.
The reflected pulse signal is transmitted to the electronic circuit
part of the instrument along the cable or rod probe, and the
microprocessor processes the signal to identify the echo generated
by the microwave pulse on the surface of the material. The correct
echo signal identification is completed by the pulse software, and
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 of the empty tank is known, the
material level L is:L=E-D
◎ Export
Set by entering empty tank height E (= zero point), full tank
height F (= full scale) and some application parameters, the
application parameters will automatically adapt the instrument to
the measurement environment, corresponding to 4- 20mA output.
Radar Level Meter Design Features
◎ Guided wave radar level meter adopts advanced microwave
processing technology and unique Echo Discovery echo processing
technology, contact measurement, high measurement accuracy and more
accurate measurement. At the same time, the guided wave radar is
resistant to adhesion and is not affected by the external
environment such as medium temperature and adhesion.
◎ A variety of process connection methods and types of detection
components make 70X series guided wave radar level gauges suitable
for various complex working conditions and applications. Such as:
high temperature, high pressure and small dielectric constant
medium.
◎ Using pulse working mode, the product has extremely low emission
power, and can be installed in various metal and non-metal
containers without harm to human body and the environment.
