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Level Measurement > FST-4000 Series

FST-4000 Series

FST-4000 Series



FST4000 is a torque tube displacement type level indicating transmitter with intelligent data processing function.
Through 18 years of field proven experiences accumulated by the existing model FST-3000, FST4000 has intensified its reliability by adding such features as SIL2 compatible functional safety, ATEX flameproof and field bus communication of FOUNDATION Fieldbus.

Varieties of materials and wide range of pressure ratings are available to meet various applications such as high pressure and temperature boilers as well as low temperature down to minus 196℃ of liquefied gases.

Short Specifications

Method of
Torque tube type displacer
Measuring objects 1) Level measurement, 2) Interface measurement, 3) Density measurement
Liquid density
1) 0.2 to 1.5g/cm3 (for level measurement)
2) Difference of density of 2 liquids: To be more than 0.1g/cm3(for interface measurement)
3) Minimum density span 0.2 (Density measurement)
Measuring range Max. 0 to 3000mm
Min. 0 to 300mm
Temperature range -196 to 400°C
Pressure class ASME class 150, 300, 600, 1500 and 2500
Connection size External chamber type: 1-1/2 or 2 inch flange
Internal chamber type: 3 or 4 inch flange
Torque tube: SUS316L, NW0276, NCF600, MONEL
Bonnet: SCPH2, SCS13A, SCS14A, SCS16A, NW0276
Chamber: Carbon steel, SUS304, SUS316, SUS316L
NW0276, MONEL, PVC, etc.
Displacer: SUS304, SUS316, SUS316L
NW0276, MONEL, PVC, etc.
Transmitter housing: ADC12
Indication Line 1 Function indication in 4 digits
Line 2 Data indication in 4 digits
Line 3 Bar graph in percent
Output/Supply voltage 1) 4 to 20 mA DC, 2 wire system with HART (version 6) / UB: 8 to 40 VDC
2) FOUNDATION Fieldbus / DC9 - 32V
Accuracy ± 0.5 %F.S (Based on mass conversion correction at factory calibration)
Protection class: IP67
Flameproof: TIIS Exd II CT6 (under application), ATEX & IECEx Exd II CT6,
Intrinsically safe: TIIS Ex ia II CT6 (under application), ATEX & IECEx Ex ia II CT6,
Others Functional safety: SIL2 compatible with IEC61508
RoHS Directive: Complied with

Catalog Download

For further details, refer to the attached PDF file for the Catalog to download.

FST4000 Series Catalog PDF

Specifications are subject to change without prior notice.

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