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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.