NYRD705 ( Stainless Steel )1.8GHz Guided Wave Radar Level Meter
NYRD705 Stainless Steel High temperature and pressure type 1.8GHz
Guided Wave Radar Level Meter Level Transmitter
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
| Parameters | Frequency: 100MHZ-1.8GHZ Measuring range:-cable :0-30m; rod, coaxial :0-6m Repeatability: ± 3mm Resolution: 1mm Sampling: echo 55 samples / s Response speed: 0.2S (depending on the actual usage) Output current signal :4-20mA Accuracy: <0.1% |
| Communication Interface | HART communication protocol |
| Process connection | G1-1/2 Flange DN50, DN80, DN100, DN150 |
| Process pressure | -1 ~ 40bar |
| Power | Power: 24VDC (± 10%), ripple voltage: 1Vpp Power consumption: max 22.5mA |
| Environmental conditions | temperature -40 ℃ ~ +80 ℃ |
| Housing protection grade | IP68 |
| Explosion levels | EXiaIICT6 |
| Instrumentation power supply and signal output wire connection | Sharing a two-core shielded cable Cable entry: 2 M20 × 1.5 (the cables diameter of 5 - 9mm) |
※ Note: Products can be customized according to the specific requirements of users!
Measurement Range
Symbol explanation:
H---- Measurement range
L---- Empty tank distance
B---- The blind area at the top
E---- The minimum distance between the probe and the tank wall
The blind area refers to the minimum distance between the highest
level of the material surface and the measurement reference point.
The bottom blind area refers to the distance near the cable bottom
that cannot be precisely measured.
The effective distance is the one between the top blind area and
the bottom blind area.
Note:Only when the material level is at between the top and bottom blind
areas can a reliable measurement of the material level be
guaranteed.
Installation Guide
The following installation guide is suitable for that of cable and
rod probes for measurement of solid particles and liquid. The
coaxial tubular probe is applied only to the liquid object.
Installation position:
Try to stay away from the outlet and inlet.
The meter should not touch the tank internal wall for metal tanks
and plastic tanks. If it is a metal tank, the material level meter
should not be installed at the center of the tank.
It is proposed to install at 1/4 of the silo diameter.
Probes of cable or rod types should keep a distance away from the
tank wall not less than 30cm.
The probe bottom should be about 30mm to the tank bottom.
The probe should keep a distance not less than 200mm from the
obstacles within the tank.
The sensor can be installed at the center of the tank top, if the
bottom of the container is a cone, so the measurement can be taken
to the tank bottom.
The picture on the right shows the rod-type radar installation
diagram, mainly used for liquid level measurement.
Radar Level Meter Electricalconnections
◎ Supply voltage
(4 ~20)mA/HART(Two-wire)
The power supply and the output current signal share a two-core
shielded cable. Refer to the technical data for the specific supply
voltage range. For the intrinsically safe type, a safety barrier
must be added between the power supply and the instrument.
(4~20)mA/HART(Four-wire)
The power supply and the current signal are separated, and each
uses a two-core shielded wire. Refer to the technical data for the
specific supply voltage range.
RS485/Modbus
The power supply and the Modbus signal are separated, and each uses
a two-core shielded wire. For specific supply voltage range see
technical data .
