★ Overview
FB3351LT liquid level transmitter is a field transmitter directly installed on pipelines or containers. Due to the direct contact between the isolation membrane and the liquid phase medium, there is no need to use a pressure tube to lead out the positive pressure side. Therefore, it can measure the liquid level, pressure, and density of media such as high temperature, high viscosity, easy crystallization, easy precipitation, and strong corrosion, and then convert them into 4-20mA signal output. The FB3351LT liquid level transmitter adopts standard flanges for installation and connection, with flat flanges and insert flanges for users to choose from. The flange installation standards are ANSI 3-inch and 4-inch, with specifications of 150LB and 300LB flanges. Flange diaphragm materials include 316L, Hastelloy, Monel, Tantalum, etc.
The FB3351LT liquid level transmitter body adopts a sophisticated small membrane box capacitive sensor produced by introducing advanced foreign technology and equipment. Its key raw materials and components are all imported, with advanced design principles, complete varieties and specifications, and easy installation and use. The appearance of this model combines the characteristics of the widely used 3051 and EJA in China,
Make it have unparalleled forward and backward compatibility, which can prevent you from being affected by the product
Protect your investment from the waste caused by being ahead of schedule.
★ Features
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High precision; |
Good stability; |
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Intelligent HART fieldbus protocol; |
※ Small, lightweight, sturdy and vibration resistant; |
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※ Range and zero point can be continuously adjusted externally; |
※ Adjustable damping; |
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Good one-way overload protection characteristics; |
※ No mechanical movable parts, low maintenance workload; |
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The entire series has a unified structure and strong interchangeability of components; |
Explosion proof structure, all-weather use; |
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The membrane material that comes into contact with the medium can be selected; The membrane can be made of corrosion-resistant materials such as 316L, TAN, HAS-C, MONEL, etc; |
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★ Technical parameters
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※technical indicators |
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● Target audience |
liquid |
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● Measurement range |
0-1.3 kPa to 0-6890 kPa |
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● Output |
4~20mADC, Intelligent HART fieldbus protocol signal output |
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● Power supply |
24V DC, Can operate at 12V DC (with LCD display minimum 15VDC), up to 45V DC |
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Positive and negative transfer |
Regardless of the output, after positive and negative migration, the upper and lower limits of the range must not exceed the limit of the range Maximum migration amount: 500% of the minimum calibration range Maximum negative transfer: 600% of the minimum calibration range |
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● Temperature range |
Storage temperature: -40 to+100 ℃ Amplifier operating temperature range (ambient temperature): -30 to+70 ℃ Working temperature (medium temperature) of silicone oil filled measuring element: -40 to+149 ℃ |
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● Humidity range |
Relative humidity is 1-100% |
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● Sensor volume change |
Less than 0.16cm3 |
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● Indicator table |
(On site) pointer type; digital display |
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Explosion proof type |
Explosion proof ExdIICT6; Intrinsic safety ExiaICT6 |
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● Range and zero point |
External continuous adjustable |
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● Overpressure limit |
Application range below 6MPa: 0 (absolute pressure) to 14MPa |
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● Damping |
Continuously adjustable between 0.2 and 16 seconds |
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● Start time |
2 seconds, no preheating required |
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※performance metrics |
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● Accuracy |
±0.5% |
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● Stability |
< ± 0.25% FS/year |
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● Temperature impact |
≤± 0.60% (change every 28 ℃ at maximum range) |
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● Static pressure influence |
≤± 0.60% (at maximum range) |
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● Vibration impact |
In any axial direction, with a frequency of 200Hz, the error caused is less than ± 0.05% of the maximum range, and the range code 2 (micro differential pressure) is ± 0.25% |
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● Power supply impact |
Less than 0.005%/V of the output range |
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● Load impact |
When the power supply is stable, there is no load impact |
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● Installation location impact |
The maximum zero point error that can be generated is 0.24 kPa, but it can be calibrated and has no impact on the measurement range |
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※performance metrics |
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● Structural materials |
Isolation membrane: 316 stainless steel, Hastelloy C, Monel alloy, Tantalum O-ring (medium contact area): Fluororubber, PTFE Flanges and bolts: 316 stainless steel. Filling fluid: silicone oil or inert oil Electrical casing: polyurethane baked paint low copper cast aluminum alloy Bolt: Stainless steel |
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● Pressure connector |
The connecting screw hole on the pressure chamber is 1/4NPT, and the connecting screw hole on the impulse joint is 1/2NPT. The center distance is shown in the external dimension drawings of various models The signal cable connection screw hole is M20 × 1.5 |
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● Shell protection level |
IP65 |
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● Weight |
3.9kg (excluding options, except for flanged transmitters) |
★ Selection Table
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FB3351LT |
Capacitive flange level transmitter |
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┆ |
code name |
Range (kPa) |
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┆ |
4 |
0-6.2~37.4 |
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┆ |
5 |
0-31.1~186.8 |
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┆ |
6 |
0-117~690 |
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7 |
0-345~2068 |
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┆ |
┆ |
code name |
output |
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┆ |
┆ |
S |
intelligent type |
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┆ |
┆ |
┆ |
code name |
Structural materials |
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┆ |
┆ |
┆ |
Nominal diameter (mm) |
Insertion tube length (mm) |
High voltage side isolation diaphragm material |
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┆ |
┆ |
┆ |
G0 |
50 |
flat |
316L (stainless steel) |
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┆ |
┆ |
┆ |
A0 |
80 |
flat |
316L (stainless steel) |
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┆ |
┆ |
┆ |
A2 |
80 |
50 |
316L (stainless steel) |
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┆ |
┆ |
┆ |
A4 |
80 |
100 |
316L (stainless steel) |
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┆ |
┆ |
┆ |
A6 |
80 |
150 |
316L (stainless steel) |
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┆ |
┆ |
┆ |
B0 |
100 |
flat |
316L (stainless steel) |
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┆ |
┆ |
┆ |
B2 |
100 |
50 |
316L (stainless steel) |
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┆ |
┆ |
┆ |
B4 |
100 |
100 |
316L (stainless steel) |
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┆ |
┆ |
┆ |
B6 |
100 |
150 |
316L (stainless steel) |
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┆ |
┆ |
┆ |
G2 |
50 |
flat |
Ha Shi C-276 |
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┆ |
┆ |
┆ |
C0 |
80 |
flat |
Ha Shi C-276 |
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┆ |
┆ |
┆ |
G4 |
50 |
flat |
Tantalum |
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┆ |
┆ |
┆ |
E0 |
80 |
flat |
Tantalum |
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┆ |
┆ |
┆ |
┆ |
code name |
Install flange |
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┆ |
┆ |
┆ |
┆ |
A |
3〞150LB |
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┆ |
┆ |
┆ |
┆ |
B |
4〞150LB |
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┆ |
┆ |
┆ |
┆ |
C |
3〞300LB |
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┆ |
┆ |
┆ |
┆ |
D |
4〞300LB |
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┆ |
┆ |
┆ |
┆ |
E |
2〞150LB |
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┆ |
┆ |
┆ |
┆ |
F |
2〞300LB |
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┆ |
┆ |
┆ |
┆ |
G |
DN50 PN2.5/4.0 |
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┆ |
┆ |
┆ |
┆ |
H |
DN80 PN2.5/4.0 |
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┆ |
┆ |
┆ |
┆ |
I |
DN100 PN2.5/4.0 |
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┆ |
┆ |
┆ |
┆ |
┆ |
code name |
Structural materials |
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┆ |
┆ |
┆ |
┆ |
┆ |
Flanges and fittings |
Exhaust/Drain Valve |
Low voltage side isolation diaphragm material |
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┆ |
┆ |
┆ |
┆ |
┆ |
22 |
316SST |
316SST |
316L (stainless steel) |
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┆ |
┆ |
┆ |
┆ |
┆ |
23 |
316SST |
316SST |
Hastelloy C alloy |
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┆ |
┆ |
┆ |
┆ |
┆ |
24 |
316SST |
316SST |
Monel alloy |
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┆ |
┆ |
┆ |
┆ |
┆ |
25 |
316SST |
316SST |
Tantalum |
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┆ |
┆ |
┆ |
┆ |
┆ |
┆ |
code name |
Optional parts (if not selected, do not fill in) |
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┆ |
┆ |
┆ |
┆ |
┆ |
┆ |
M1 |
0-100% linear indicator table |
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┆ |
┆ |
┆ |
┆ |
┆ |
┆ |
M3 |
LCD watch |
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┆ |
┆ |
┆ |
┆ |
┆ |
┆ |
B1 |
Pipe bending installation plate |
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┆ |
┆ |
┆ |
┆ |
┆ |
┆ |
B2 |
Plate bending installation plate |
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┆ |
┆ |
┆ |
┆ |
┆ |
┆ |
B3 |
Pipe installation safety installation board |
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┆ |
┆ |
┆ |
┆ |
┆ |
┆ |
D1 |
The side relief valve is located at the upper part of the pressure chamber |
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┆ |
┆ |
┆ |
┆ |
┆ |
┆ |
D2 |
The side relief valve is located at the lower part of the pressure chamber |
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┆ |
┆ |
┆ |
┆ |
┆ |
┆ |
C1 |
1/2-14NPT pressure joint rear welded pressure pipe with a diameter of 14 |
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┆ |
┆ |
┆ |
┆ |
┆ |
┆ |
C2 |
T-shaped external thread joint M20X1.5 |
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┆ |
┆ |
┆ |
┆ |
┆ |
┆ |
C3 |
1/2-14NPT taper pipe female thread joint |
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┆ |
┆ |
┆ |
┆ |
┆ |
┆ |
d |
Explosion proof ExdIICT6 |
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|
┆ |
┆ |
┆ |
┆ |
┆ |
┆ |
i |
Intrinsically safe ExiaICT6 |
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FB3351LT |
4 |
E |
A0 |
B |
22 |
M1 |
Example of transmitter selection |
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Note: Other dimensions for flange installation will be ordered separately.
