Radio Frequency Magnetic Level Gauges Smart L3541CR Remote Point
Level Controller
●Working Principle
Based on the principle of conductivity, the probe and the tank wall
can serve as the two poles,the air and the insulated element
becomes the medium in this situation. When the level of material
rise to the probe, the medium air will be substituted by material,
so the dielectric constant would be changed. As the dielectric
constant of material is larger than that of air (=1), which will
change the conductivity and impedance at the main time, the circuit
board of L2000C will detect the change and enlarge it, by compare
with the reference point, the circuit will generate a relay output
accordingly.
The set of reference point is important for the unit generate a
correct output.
Based the technical of RF, a radio frequency will be sent to the
working element and the guard element, which will cut off the
current generated by the adhered material on the element.
By this way, the probe can measure the level of material without
the influence of adhered material.
●Description
L3541CR is developed and produced on the basis of Princo’s
technology.
With the NULL-KOTETM Circuitry and the technology of surface
mounting, the sensor could immune to adverse effects from
conductive coating build-up. L3541has the function of
“self-checking”, which allows the instrument check it’s performing
on the field.
Operating on the RF impedance sensing principle, the L3541CR could
detect the presence (high level) or absence (low level) of a wide
variety of materials. It may be made fail-safe in either high or
low mode. It can operate in conjunction with varied process
materials, such as refined oils, gasoline, conductive slurries,
etc. Consisting of two separate devices, a Sensor Head and a
Control Unit, allows convenient calibration.
The Model L3541CR could be used in conjunction with an L86X Series
Sensor Probe. L863C is the probe commonly used with the L3541CR,
L890C is the flat probe and the flexible wire probe is also on
offer. Make by different material, or Stainless Steel, the probe
could work in a wide application, such as ambient with high
temperature or pressure. And it could be used to measure liquid,
powder, solid and corrosive material
L3541CR1 is suitable for single point level control at high
location or low location. L3541CR2 can offer two point level
control at the main time, it can serve at high point and low point
at the main time.
●Features
■Suitable for wide application: can be used to measure almost all
kinds of material, fly ash, grain, powder, liquid, slimy material,
electric material and non-electric material.
■Adhering proof circuit: ignore the effect of adhered material.
■Easy-on probe: No wire used to connect the probe and the
controller, which allow the user remove it easily.
■Suitable for application of high temperature and low temperature:
-184℃ to 260℃, high temperature probe also be available.
■Large output capacity: 2.5A/230VAC relay, with status light, time
delay for 0~30 seconds.
■Technical of surface sealing: Anti-vibration, ensure the steady
work of circuit board.
■Self-checking function: The user can know the working situation of
the controller easily.
■Design of two-part system: Make it suitable for high tank; the
user can calibrate it easily.
●Model: L3541C-XXX (See the specification for detail)
●Specifications
Relay:DPDT, rated at 2.5A/230VAC, or 5A/26VDC
Delay Time:adjustable from 0 to 30 seconds
Power Requirements:220Vac or 24Vdc
Sensitivity:0.1pF-1000pF
Process Temperature:-184℃ to 260℃
Ambient Temperature:-40℃ to 70℃
Fail-Safe:High or Low Mode, Field selectable
Housing Standard:IP65, Heavy duty, cast aluminum
Electrical connector:PG9
Stainless steel or probe
Wire length between the Sensor Head and the Control
Unit could be 1000m. 7m for standard model
●Probe Specifications
Mounting Screw:1” NPT
Material:SS,
Wetted Part Material:SS
Electrical Conduit Connector:PG11 or 3/4” NPT
Relation between Operating Pressure and Temperature:70kg/cm2@-184℃
70kg/cm2@38℃
31.5kg/cm2@149℃
24.7kg/cm2@205℃
0kg/cm2@260℃
RF level controller of high temperature type, anti-corrosive type, with cable probe or
plate probe can be optional.
