FT8511 series Magnetostrictive Coupling Level Gauge

FT8511 serial coupling magnetrostrictive level gauge is based on magnetostrictive principle.  It is comprised of one magnetrostrictive level system and one magnetism vane liquidometer, two wire intrinsic safe design, mainly for accurate process level control and storage tank volume measurement/control in petroleum、power、chemical、metallurgy、light industries etc.

This product is a bundle constitution of  one magnetism vane liquidometer and one magnetostrictive level system.

》》》》Operation Principle

Sensor is the center of the magnetostrictive monitoring system, and the core sensitive component(magnetostrictive wire) of the sensor need has high adapted ability、strong convert capability of electrical(magnetic) /mechanical wave to transfer the small magnetic vector change to be a mechanical wave. Sensor is comprised of stainless steel rod(inside include supper magnetostrictive wire) and float(inside include rare earth permanent magnet) two parts. While the pulser of electronic part emits a electric pulse transmit along with the magnetostrive wire inside of the steel pipe, the electrical pulse also accompany generate an annular magnetic field vertically to the wire，and the field transmit along with the wire at velocity of light.When the annular filed of the electrical pulse meets the fix filed of the float, the two magnetic fields interacts each other, then occurs instant torsional force and form a mechanical torsional pulse wave on the wire. This mechanical torsional wave use a fixed speed return to electronic part and be picked up by that part. According to the time difference between the emitted electric pulse and the returned torsional wave, the material level or interface could be accurate calculated out.

》》》》Characters  

Ø  High temperature high pressure：-196～450℃(-321～842℉), 10Mpa（1450psi）

Ø  Two display outputs：Except Magnetism vane liquidometer provide local indication, the magnetostrictive level system also support 4-20mA output to go to the main control room

Ø  Easy installations：Outside vessel installation gives convenience for field mounting、calibration and

maintenance while no affection to the process production line

Ø  High accuracy：instrument accuracy reach 1mm

Ø  Modular design：The sensing element and electronic unit could be interchange between different

system, easy for spare and maintenance. 

Ø  Remote installation：Suitable for multiple dangerous/harsh applications, convenience for control and

monitoring

Ø  HART communication ： Built-in two wire field 4-20mA HART protocol

Ø  Field keyboard calibration：The two keyboards on the top the electronic could calibrate the

Ø  high/lower level points easily in the field

 》》》》Typical Applications

Ø  Refined oil storage tank

Ø  Liquefied gas storage tank

Ø  Variable chemical reagents

Ø  Process tank leakage detection

Ø  Water & wastewater treatment

Ø  Other high accuracy level detection

》》》》Specifications

Ø  Measuring rate of facility: CAT I, transient over voltage 1500V, only use the equipment for    

measurements within measurement category I

Ø  Output：4~20mA，HART digital protocol, output direction software adjustable

Ø  Measuring Type：Level(DIR) or Distance(REV) field adjustable

Ø  Power requirement：12~35VDC; For communication: 15~35VDC

Ø  Dissipation power: less than 0.5W

Ø  Accuracy：   ≤0.1%FS or 1mm (which greater)

Ø  Resolution:   ≤0.04%FS or 0.4mm (which greater)

Ø  Repeatability: ≤0.04%FS or 0.4mm (which greater)

Ø  Linearity correction: 10 points non-linearity correction by software (if necessary)

Ø  Temperature Affection: 0.05%/10℃(18℉)

Ø  Load resistance：24VDC output loop resistance 600Ω

Ø  Ambient Temp.：T5:-40­～+70℃(-40～158℉)；T6:-40­～+60℃(-40～140℉)

(Effect of the process temperature on the environment temperature should not exceed the

environment temperature requirements of the instrument.)

Ø  Response Time: < 2 seconds

Ø  Time Delay: 1～90seconds adjustable(software)

Ø  Range：0~5m(rigid) ，0~20m(flexible cable)

Ø  Dead Zone：Upper zone: ≤ 1/2 float height

Lower zone: Rigid sensor- 1 float height;Cable sensor- 250mm to 450mm

Ø  Max. process temperature: -196～+450℃(-321～778℉,for details please see probe specifications)

Ø  Max. process pressure: 10 MPa(1450psi) (for details please see probe specifications)

Ø  Process density: 0.38g/cm³～2g/cm³

Ø  Cable length: max . remote cable 3m

Ø  Electrical connection：double M20×1.5 (3/4” NPT optional ) 

Ø  Process connection：Double flanges(measuring displacer installation)

Ø  Housing Material:  Die casting aluminum epoxy coating

Ø  Explosion-proof rating：Exia IIB T5/T6 Ga & Exd IIBT5/T6 Gb

Ø  Ingress protection：IP67

Ø  Approval：PCEC/NEPSI, for other approval please consult factory

Product Electronic Handbook Download

Future Product Electronic Handbook (21.7 MB)