FS Series
SPRING BALANCED DISPLACEMENT TYPELEVEL INDICATOR / TRANSMITTEROUTLINEFS series detects and indicates liquid level by spring balanced displacer. Along with local level indication by pointerdial, alarm contacts, pneumatic output or electiric outout
can be provided for versatile application.

STANDARD SPECIFICATIONS
Mechanical portion
Detection method: By spring balanced displacer

Measuring range: Min.300mm

Suitable liquid density: Standard range 0.7 to 1.3g/cm3Max.3000mm
Other density range available onrequest. However, size of connection flanges may differ fromstandard sizes.
Viscosity: Max. 600 mPa·s. Liquid without
sticking, crystallization, or freezing

Installation and connection flange size:a. Without chamber (Fig.1) or Welding type internal
Liquid temperature :chamber (Fig.2)
Measuring range upto 1000mm:

4” flange

Standard

Measuring range more than 1000mm:

3” flange

With radiation fin: –40 to –11°C (Low temp. version)+151 to +350°C (High temp. version)(The above may differ depending on density.)

Contact factory for material limitationb. Bolt-on internal chamber (Fig.3) or Insertion type internal

for Low and High temp. version.

chamber (Fig.4)
Measuring range upto 1000mm:

5” flange

Measuring range more than 1000mm:4” flange(The above may differ depending on density.)c. Tank side external chamber (Fig.5 and 6)
1

Through 1 /2” flanges irrespective of measuring range

Material construction :Spring: SUS316, UNS N10276, others

Displacer: SUS304, SUS316, SUS316L, others

Upper flange: Carbon steel, SUS304, SUS316, SUS316L,others

Indication : By single pointer, 0 to 100%, standard scale
length 80mm (actual scale available on request)

Chambertion at factory calibration):Low pressure version: Max. 1MPa

Medium pressure version: Max. 2MPa

High pressure version: Contact us for details.

: Carbon steel, SUS304, SUS316, SUS316L,
others

Accuracy : ±1.5% F.S. (Based on mass conversion correcPressure rating: –10 to +150°C

Indicator: ADC12 (Aluminum die-casting)

Radiation fin: AC2A (Aluminum casting)

Painting: Indicator ;Polyurethan resin baking
paint (Munsell 7.5BG 4/1.5)

Chamber ; Only carbon steel ispainted in silver.

TG-L541-10E
RevisedJan 2017 K
2nd edition Feb 1998

FS Series*/45"--"5*0/$0%&(2)#"4*$$0%&(1)."5&3*"-$0%&(3)'6/$5*0/r13&4463&r$0//&$5*0/(4)

F4 –(1) BASIC CODE

(2) INSTALLATION CODE

11355

FUNCTION

1111
10532
7

CONSTRUCTION

Local indication*1+ Alarm contact (s)+ Pneumatic output *1+ Electric output+ Electric +contact (s)*1W Weather proof
E Flameproof*2
S Intrinsically safe

123
CHAMBER4CONSTRUCTION
569Without chamber
Welding type internal chamber
Bolt-on internal chamber
Insertion type internal chamber
Side~side external chamber
Side~bottom external chamber
Special design

Fig.1
Fig.2
Fig.3
Fig.4
Fig.5
Fig.6

*1 : Explosion-proof structure only
*2 : Intrinsically safe apply only FS-115S-type(3) MATERIAL CODESPRINGDISPLACER

6C
E
9SUS316
UNS N10276
Inconel
OTHERS
SUS304
SUS316
SUS316L
OTHERS

46L
9UPPER FLANGECHAMBER(4) FUNCTION • PRESSURE • CONNECTIONS
46L9S
46L91

*1*1FUNCTION

12*2

CARBON STEELSUS304
SUS316
SUS316L
OTHERSCARBON STEELSUS304
SUS316
SUS316L
OTHERS
Without chamber

PRESS.
RATINGPROCESSFLANGE SIZE

LM
H
34569Liquid level*1Interface
Low press.
Medium press.
High press.
3" flange
4" flange
Fig.1,2,3
and 4
5" flange

1-1/2" flange
OTHERS
Fig.5,6
1 JIS 10KRF
2 JIS 20K
RF
3 ANSI#150
RF
PROCESS
4 ANSI#300
RF
FLANGE RATING
5 JPI#150
RF
6 JPI#300
RF9 OTHERS*1: Displcaer is to be totally dipped into liquid to be measured*1: Liquid temperature upto 230°C*2: For liquid temperature 231°C to 350°C(Confirm anticorrosive capability.)

2TOKYO KEISO CO., LTD.

TG-L541-10E

FS Series

OUTPUT(5).&"463*/(3"/(&(6)

OPTION(7)(5) OUTPUT(7) OPTION
Indicate necessary options by the following abbreviations:012
3
4Output
5Signal
678A
Z

EntryNIL
1 point
2 points
3 points
4 points
5 points
6 points
20 to 100 kPa = 0 to 100%
0.2 to 1.0 bar G = 0 to 100%
4 to 20 mA DC = 0 to 100%
OTHERS
1 Rc (=PT) female
2 NPTfemale
3 G (=PF) female
4 NPTfemale
9OTHERS

for FS-110

CG : Pressure tight cable gland*1

CF : Radiation fin
AS : Air set (Filter regulator, for FS-313)
for FS-115/
FS-517(To two points) VP : Vent plugfor FS-313
for FS-512/FS-517

VS : Volume graduation*2

SS : Special graduation*2

HS : Liquid height graduation
BS : No indication (Blind plate)
SC : Special color, paintfor FS-313
for FS-115/FS-512/
FS-517

DV : Drain valve (Material as per chamber material)*1 : Specify external diameter of cable*2 : Specify graduation (Heght~volume etc.)(6) Measuring range

1300mm
2500mm
3800mm41000mm
51200mm
Measuring
61500mmrange
71800mm
82000mm92500mm
A3000mm
ZOrder made ** : Specify measuring range in case of Order made (Z).

Versions shown in bold type are manufactured asstandard. The rest are special versions for which
longer delivery time is required.
Bolts, nuts and gaskets for process connection are
to be supplied by the customer.

CAUTION ON SELECTION● The FS level gauge with a spring operates in response to changes in the buoyancy of the displacer. Because alarms are set at a given operating density and temperature, if the density or temperature changes, the alarm level may shift or the alarm may not be issued. Therefore,
this switch is not suitable for use in conditions where the operating density or temperature tends to fluctuate.
● Do not use this switch in tanks with a mixer or other similar apparatus.

TG-L541-10E

TOKYO KEISO CO., LTD.

3

FS Series

DIMENSIONS

Fig. 1
Without chamber

Fig. 2
Welding type internal
chamberFig. 3Fig. 4Bolt-on internalchamberInsertion type internal
chamber

STANDARD DIMENSION TABLE

Measuring range (mm)

HFF
øDøE
A1
A2
A3
5"
5"
6"
450 89.1
300
650
500
4"
4"
5"
76.3
950
800
1000 1150
60.5
1200 1350
11/2"
1500 1650 48.6
1800 1950
3"
3"
4"
42.7
2000 2150
2500 2650
34.0
3000 3150
Refer to Fig.1 to 6 for signs.
Values in the table are for measuring the level of liquids witha standard density. They may differ when measuring the levelof liquids with a non-standard density or measuring the interfaceof two liquids.

4Fig. 5Fig. 6

Side to side external
chamber

Side to Bottom external
chamberTOKYO KEISO CO., LTD.

TG-L541-10E

FS Series

TRANSMITTERS SPECIFICATION(1) ALARM CONTACT (FS-115 ■ )Construction
Weather proof
Flameproof
Intrinsically safe

: IP54 equ. (FS-115W): d2G4(FS-115E): Ex ia IIC T6 (FS-115S)With intrinsically safe relay

Fig. 9 : FS-115W/S, 3 to 6 points
Number of contact :Lowest position
Highest position
Min. point inteval

Max. 6 points: Higher than 10% of full span
: Lower than 90% of full span
: Higher than 10% of full span

Contact setting accuracy : ±1.0% F.S. (Against local indication)
Switching hysteresis : 10% F.S.
Switch: Microswitch SPDT
Contact capacity : 250 V AC, 5A (Resistance load)
125 V DC, 0.4A (Resistance load)
Minimum applicable load :5 V DC, 160mA
Ambient Temp. :Weather proof (FS-115W) : –25 to +60°C
Flameproof(FS-115E): –10 to +60°C
Intrinsically safe (FS-115S): –10 to +40°C
Provide heat insulation if required.
Cable entry:
No. of alarm point
Connection size
No. of connection

12341/2B
153/4B1*

Fig. 10 : FS-115E, 3 and 6 points

FS-115W/S
for 1 point alarmfor 2 points alarmfor 1 point alarmfor 2 points alarm

6for 3 to 6 points alarm

FS-115E
for 3 to 6 points alarm

Connection: (Standard) ISO G female screw(Option) NPT female screw*: 2 points are also available as special order.

Option :1) Cable gland with pressure tight gasket

Fig. 11 : Terminal arrangement

External dimension for indicator and terminal box

Fig. 7 : FS-115W/S, 1 and 2 points

Fig. 8 : FS-115E, 1 and 2 points
TG-L541-10E

TOKYO KEISO CO., LTD.

5FS Series(2) PNEUMATIC TRANSMITTER (FS-313W)
Construction
Input
Output: Weather proof (IP54 equ.): 0.14±0.01MPa: Standard 0.2 to 100kPa
Option 0.2 to 1.0bar
Output accuracy : ±1.0% F.S. (Against local indication)
Air connection : Standard 2 × Rc 1/4 (=PT1/4)
Option 2 × NPT1/4 female(Input and output pressure gauges provided.)
Ambient temp. : –20 to +80°C
Option :1) Air set (Filter regulator)
Input : Max. 990kPa

G1/2 or1/2”NPTFig. 13 : Indicator and transmitter assembly(FS-512W and FS-512E)

External dimension of indicator and pneumatic transmitter
4 to 20 mA DC

12 to 30 V DC

Load Max. : 600Ω (at 24 V DC)
Fig. 14 : Terminal Arrangement(FS-512W and FS-512E)

Fig. 12 : FS-313W (Air set : option)(4) ELECTRIC TRANSMITTER AND ALARM CONTACT (FS-517 ■ )(3) ELECTRIC TRANSMITTER (FS-512 ■)Construction
Wether proof (FS-517W)
Ex-d version is not available. Maximum alarm contact is
2 points.
Specification for Alarm contact is as of FS-115.
Specification for Analog output is as of FS-512. Refer to themfor details.

298

12130(60)(85)

G1/2 or1/2”NPT(65)

233

416

G1/250Construction
Wether proof (FS-512W)
IP54 equivalent
Flameproof (FS-512E)
Exd llB T4
Power supply voltage
Weather proof (FS-512W) and Pressure tight Ex-proof (FS-512E)
12 to 30 V DC
Output4 to 20 mA DC
Max. Load
Weather proof (FS-512W) and Pressure tight Ex-proof (FS-512E)
600Ω (At 24 V DC)
Intrinsically safe (FS-512S)
750Ω
Cable entry
G1/2
In case of Ex-d (FS-512E), use Pressure tightcable gland type SCX-16B manufactured by
Shimada ElectricOutput accuracy±1.0% F.S. (Against local indication)
Amb. Temp.
Weather proof (FS-512W)–30 to +70°C
Pressure tight Ex-proof (FS-512E)–20 to +55°C

60

62

164

Fig. 15 : Indicator and transmitter assembly (FS-517W)

CautionThe cable gland is supplied optionally on request.
The flameproof enclosure of FS-512E is certified as a combined
unit with the designated cable gland. Use the one designated by
us when it is supplied by customers.
Designated cable gland : SXC-16B by Shimada Electric Co., Ltd.

6TOKYO KEISO CO., LTD.

TG-L541-10E

FS SeriesSUPPLY SCOPE
1.

Blots, nuts and gaskets for process connection are
customer’s scope of supply.

2.

Standard accessories
Special tool for explosion proof housing
Instruction manual.

ORDERING FORM
Specify the following for order or inquiry :1

TAG.NO.

2Model code FS –3

Liquid name4

Density5

Viscosity

6Pressure

7

Vapour density

9

Measuring range

––––

MPa

Temperature NOR.

8–MAX.

°C°F

mminch*h1h2
ALARM SETTING
POINT ANDACTION *10h3h4h5H* Switch action(HC, HO, LC, LO)

h1h2h3h4h5h6550h611SPECIALNOTE* Specification is subject to change without notice.

Head Office : Shiba Toho Building, 1 – 7 – 24 Shibakoen, Minato-ku, Tokyo 105 – 8558
Tel : +81-3 – 3431 – 1625 (KEY) ; Fax : +81-3 – 3433 – 4922
e-mail : overseas.sales@tokyokeiso.co.jp ; URL : http://www.tokyokeiso.co.jp
TG-L541-10E

TOKYO KEISO CO., LTD.

7