Industrial Guided Wave Radar Level Sensor with 4-20mA RS485 Output
PTFE Cable Type Radar Level Transmitter
Industrial Guided Wave Radar Level Sensor Working Principle
The high-frequency microwave pulse sent by the guided wave radar
propagates along the detection component (steel cable or steel
bar). When encountering the measured medium, a sudden change in the
dielectric constant causes reflection, and 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.
Input:
Guided wave radar is a measuring instrument based on the principle
of time travel. The radar wave operates at the speed of light,and
the operating time can be converted into a level signal through
electronic components. The probe sends out high-frequency pulses
and propagates along the cable or rod probe. When the pulses meet
the material surface, they are reflected back and received by the
receiver in the instrument, and the distance signal is converted
into the level signal.
The reflected pulse signal is transmitted to the electronic circuit
of the instrument along the cable or rod probe. The microprocessor
processes the signal and recognizes the echo generated by the
microwave pulse on the material surface. The correct echo signal
identification is completed by the pulse software. 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 level is: L=E-D
Output:
By entering empty tank height E(= zero), full tank height F(= full
range) and some application parameters, the application parameters
will automatically adapt the meter to the measuring environment,
corresponding to 4-20mA output.
Industrial Guided Wave Radar Level Sensor Design Features
◎ Contact measurement with high accuracy for more accurate results
◎ Not affected by external environments such as medium temperature,
adhesion, etc.
◎ Suitable for various complex working conditions and applications,
such as high temperature, high pressure, media of low dielectric constant, etc.
◎ Can be installed in various metal and non-metallic containers,
without any harm to human body and environment.
Industrial Guided Wave Radar Level Sensor Technical Parameters
| Product Model | NYRD701 |
| Typical application | Highly corrosive liquids |
| Antenna material | 304 |
| Antenna type | Soft cable antenna |
| Measuring range | 30m |
| Measuring accuracy | ±1mm |
| Power supply | 24VDC (two-wire, four-wire) |
| Medium temperature | -40~+130℃, -40~+250℃ |
| Process connection | Thread, flange (optional) |
| Process pressure | -0.1~4.0MPa |
| Protection class | IP67 |
| Explosion-proof grade | Exia II CT6 (optional) |
| Signal output | 4...20mA/HART/RS485/Modbus... |
| Electrical interface | M20*1.5, ½ ″NPT |
Note: Products can be customized according to the specific
requirements of users.
Industrial Guided Wave Radar Level Sensor Related Pictures
