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level meter

244LD Intelligent Displacer Level (Interface) Transmitter
244LD Intelligent Displacer Level (Interface) Transmitter
Summary
244LD intelligent displacer level (interface) level transmitter is designed based on Archimedes Buoyancy Principle. It can be used for measuring liquid level, interface and density. The latest model of FDT/DTM technology can provide online calibration and diagnosis, durable in use. A wide range of material selection is suitable for different medium environment. 244LD intelligent displacer level (interface) transmitter in extreme temperature and pressure conditions can be reliable work. This Transmitter is available for any dangerous application. 244LD intelligent displacer level (interface) transmitter is manufactured by Dandong Top Electronics Instrument (Group) Co. Ltd and FOXBORO, The transmitting head and other important parts are original products supplied by FOXBORO, the finished products are as per the original factory standard (FOXBORO).
  • Operating Principle
  • Technical Parameter
  • Model Selection Table
  • Outline and installation
  • Ordering information
The buoyancy of displacer 4 is transmitted to the sensor 3 via lever 1 and the torque tube 2. In measuring range, the voltage is proportional to the buoyancy, and as the input signal is transmitted to the electronic amplifier. Through the electronic amplifier, voltage is converted to 4-20 mA two-wires output signal. In the two-wires system mode, amplifier is powered by the signal current circuit.
Any part of the displacer immersed in liquid is adhering to the principle of Archimedes. By measuring buoyancy change of cylindrical displacer suspended in liquid, you can measure the liquid level, interface level or density.

When measuring the density and interface level, the displacer should be completely immersed in liquid. The change of the liquid level must be in range area.
The calculation of buoyancy:
FA= VX•ρ1•g+( V -VX) •ρ2•g
In the formula:FA:Buoyancy
V:The volume of the displacer
VX:In the liquid density of ρ1, the medium volume displacer swaps out
ρ1:The average of the heavy medium density
ρ2:The average of the lighter medium density
g:The local acceleration of gravity
FG: Buoy its own gravity
 

•Power supply:12~42V DC
•Output Signal:4~20mA/20~4mA
•measurement range:300~3000mm(Beyond the range can be produced)
•nominal pressure:≤42.0MPa
•nominal diameter:DN40 or as customers’ request
•ambient temperature:-40℃~+85℃
•operating temperature:-196℃~+500℃
•accuracy rating:0.2class
•load resistance:(Power supply -12V)/0.02A
•LED display:Five digits can be configured to %,mA or other physical unit
•Medium boundary density difference:≥0.08g/cm3
•Torque tube material:standard configuration Inconel600,or Monel、HasetlloyC-276
•chamber material: carbon steel、304、316L or as customers’ request
•displacer material:304、316L or as customers’ request
•Flange standard:HG/T20592-2009、HG/T20615-2009 or as customers’ request
•cable entry:Two NPT1/2(internal thread) or as customers’ request
•explosion-proof:Intrinsically safe ExiaⅡCT4
•protection class:IP66

Model

Code

Code Meaning

144LD-

 

Intelligent Displacer Liquid Level Transmitter

 

1

 

Liquid level measurement

2

 

Interface level measurement

3

 

Density measurement

 

 

A

 

Top-side mounted type

B

 

Top-bottom mounted type

C

 

Side-side mounted type

D

 

Bottom-side mounted type

E

 

Top mounted type

F

 

Offset type mounted type

S

 

“S” Top-bottom mounted type

 

 

 

1

 

Nominal pressure ≤PN2.5MPa、2.0Mpa(class150)

2

 

Nominal pressure:PN4.0MPa

3

 

Nominal pressure:PN6.3MPa、5.0MPa(class 300)

4

 

Nominal pressure:PN10.0MPa、11.0MPa(class600)

 

 

 

5

 

Nominal pressure:PN16.0MPa、15.0MPa(class900)

 

 

 

6

 

Nominal pressure≤PN26.0MPa(class1500)

 

 

 

7

 

Nominal pressure≤PN42.0MPa(class2500) Need to review

 

 

 

 

/

 

 

 

 

 

 

 

i

 

Explosion-proof:Intrinsically Safe Type

 

 

 

 

 

 

T

 

Chamber material:Carbon Steel

H

 

Chamber material:304(other brand according to the actual material to fill in)

 

 

 

 

 

 

 

L

 

medium temperature:-196℃≤T<-30℃

D

 

medium temperature:-30℃≤T<+100℃

G

 

medium temperature:100℃≤T≤500℃

 

 

 

 

 

 

 

 

/

 

 

 

 

 

 

 

 

 

 

 

Range

 

According to the actual fill in,default unit is mm

Attached with coding

F

 

Chamber with heating,DN15,PN2.5RF flange
connection ( standard configuration)

 

Z

 

Chamber with heating,R1/2 male thread connection (standard configuration)

 

 

W

Transmitting head is installed at left hand
(Note no W for the right type of installation header)

244LD-

/

/

Range

 

Example:
244LD-2C2/iTD/800F:means measuring interface,Side-side mounted type,nominal pressure is 4.0MPa,Intrinsically safe intelligent transmitter, chamber material is carbon steel,Measuring fluid temperature is -30℃≤T<+100℃,range is 800mm, heat chamber is flange interface type.
1. The structure and size
H is the range in the picture below,nominal pressure≤PN6.3MPa .
A top-side mounted type              B Top-bottom mounted type             C Side-side mounted type

D Bottom-side mounted type            E Top mounted type
 
2 The Installation orientation of smart level controller
Assemble the intelligent level controller to measuring chamber of displacer. Right type of installation is Controller installed on right of the displacer, torque tube rotates clockwise when liquid level rises. Left type of installation is Controller installed on the left of the displacer, torque tube rotates clockwise when liquid level rises.

3 Material and temperature

material

Process temperature

Min.

Max.

cast iron

-29℃

232℃

steel

-29℃

427℃

stainless steel

-198℃

427℃

Monel

-198℃

371℃

Inconel

-198℃

600℃

-198℃

400℃

graphite flake/stainless steel gasket

-198℃

427℃

Monel / P.T.F.E

-73℃

204℃


4 Safety barrier recommendation table:

Shanghai I.S.Instruments & system Co.,Ltd

LS4041-Ex

Germany P+F company

KFD2-STC3- Ex1

Shanghai Automation Instrument Institute

GS8041- Ex  GS8045- Ex

Dandong Top Electronics Instrument (Group) Co.,Ltd.

TP5041- Ex  TP5045- Ex

Longfei Group Corporation in China

LF1045

England

MTL3046B  MTL5042  MTL706+

According to Model Selection Table select operating pressure and temperature
 
Special wetted material grades
Instrument installation tag No.
Flange standard
Name and density of medium
Instrument accuracy grade