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FW-9000NN Series PDF

*Specifications are subject to change without prior notice.

FW9000NN Series is the successor to the well received and widely used FW-9000 series for its reliability and variety of long term application.

Using the most of reliable, durable and highly accurate mechanism of FW-9000, FW9000NN has become more reliable and user-friend-ly by introducing up-dated electronics etc (SIL2 compatible). Consequently, FW9000NN has the interchangeability with the cur-rent FW-9000 series in terms of installation methods and interfaces with other equipment.
Its noise resistivity and lightening protection performance have been improved significantly.
The intensified automatic self-diagnosis and self-adjustment func-tions have made FW9000NN more user friendly.
Including ATEX certified version intended for use in potentially ex-plosive atmosphere FW9000NN is ready to serve world-wide users.


  • · For bonded tanks
  • · For LPG, LNG, Petroleum, Fuels, Water supply and Sewage systems, Chemicals, Power Plants, Food and Beverages.
  • · For versatile applications such as various kinds of liquid measurement, 2-liquids interface, a-point-measurement of liquid density, multi-points measurement of liquid density for profile presentation.


Those items marked as are added or improved features from ex-isting models.

  • ■ For bonded tanks
    The increased noise resistivity and lightening protection assure you reliable operation as complying with superb level 4 or more stipulated in IEC61000-4,5.
  • ■ Having the same dimensions and materials as existing models, FW9000NN is compatible to Japanese explosion-proof requirements and is interchangeable with existing FW-9000 to make replacement easy.
  • ■ Parameters can be set without opening housing with 4 magnet sensors attached to the indicating windows.
  • ■ Compatible with wide range of power supply from 100 to 240 VAC, 50/60Hz.
  • ■ Power source of 100 to 240 VAC 50/60Hz is acceptable
  • ■ Standard 2 sizes of measuring drums cover wide measuring ranges from small to gigantic tanks
  • · Complying with RoHS requirements.
  • · Eco-friendly low power consumption as small as Max. 25VA.
  • · Covers high design pressure up to 3.0 MPa.
  • · Electronic circuits are installed in the electric compartment which is completely isolated from drum compartment.
  • · Can be connected to the existing spot type and multipoint aver-aging temperature sensors.
  • · Precision stepping motor control with micro processor has real-ized amagingly accurate measurement.
  • · Highly reliable operation with powerful self-diagnosis functions (SIL2).
  • · High durability with non-contact type balancer without using slip ring.
  • · In has addition to the high-speed serial data communication, FW9000NN have various communication tools which are com-patible to TOKYO KEISO's existing well-established transmitters. Therefore, FW-9000NN serves with ease for your renovation and replacement of the existing tank monitoring system.
  • · In combination with DIR110NN series, Max. 6 contact signals transmitted between field and control room. Monitoring and con-trol of equipments around the tank yard are also possible in addi-tion to liquid level measurement.
  • · 4 to 20 mA signals such as pressure signal can be digitalized and retransmitted
  • · Analog 4 to 20mA signals such as level and temperature can be output additionally to meet with high speed data processing car-ried by host computers.

Short Specifications

Mechanical specifications

Liquid level
detection methods
Digital controlled electric servo balancing type consisting of small size displacer, measuring wire and wire drum
Measuring range Maximu: 60m
Temperature Liquid: -200 to +300°C
Ambient: -20 to +55°C (Temperature of main body)

However, the liquid and the moisture inside the wire drum room shall not freeze over, nor adhere.
*Not suitable for the use environment where the mass of displacer changes.
Pressure Max: 3MPa
Liquid level measurement
Interface measurement In case of density difference of 0.2g/cm³
Density measurement: ±0.005g/cm³
*Under reference conditions.
3", 4", 5", 6" JIS5K/10K/20K/30KRF, ANSI150/300,
JPI150/300 Flange connection
Displacer guiding Stand pipe method as standard,
Non-guiding and guide wire methods as an option

Mechanical specifications

Temperature: Pt100Ω spot temp. sensor, Average temp. sensor, Multi-spot average temp. senor
Analog signal: 4 to 20mA DC 1point. Conversion accuracy ±0.5% F.S.
Serial data output to control room
Serial data output to explosion-proof tank side receiver
Contact outputs Numbers of contacts: 2 Combination: SPST (1a or 1b)
Analog outputs: 2 points of 4 to 20mADC for level and temperature
Presentation 2 indication parts by LCD
Enclosure Water-tight (FW9□□□NNW) or Flameproof Exd II CT6 (FW9□□□NNE)
Power supply AC100 to 240V、50/60Hz
Consumption Maximum 25VA