FUSHIMAN Co., Ltd. (Japan) TEL. +81-3-5767-4200 http://www.fushiman.co.jp

Level switch

Level switch

Level switch is used for transmitting the liquid level.

Model SLG

Model SLDI

Model SLS

Model SLL

Model SLN

■ Installation example
External ﬂoat type
SLG
SLDL
SLDI
SLDH
SLDS

Internal ﬂoat type
SLL

SLS

SLN

SLL

11
Level switch

OFF or ON
ON orOFFON or OFFON orOFF

OFF or ON

OFF or ON
ON or OFFHigh alarm
Level control
or alarm

OFF or ON
Level control

ON or OFFON or OFFOFF or ON

OFF or ON
Low alarmHigh and low alarm■ Operating
Liquid level is detected by ﬂoat.

Tolerance and diﬀerential

The switch mechanism transmit the pre-setted level.
ModelTolerance（150−5550）±20

SLSSLLWithin ±10SLN
SLG

Differential

55±20

Within ±510＋15−5Within ±720±10

SLDL
SLDI
SLDH
SLDS222（mm）

Level switch■ Speciﬁcations of body and ﬂoat
Switch housing

Internalfloat

FluidFloat

Splash proof type
（1）
Water tight type

Model（2）（ 3 ） Max. press.
（MPa）
SLS○
SLL○
SLN□

External float

SLG○
Splash proof type
（1）
Water tight type

SLDL○
SLDI○
SLDH○
SLDS○

MaterialMax. temp. Min. specific（℃）（5）
gravitySize and connection
100A
Flanged
JIS10K

1.0

100

0.8

1.0
2.0
2.0
6.3
10.0
14.3

183
215215279
310
337.3

0.85
0.85
（4）
0.8
0.75
0.7
0.618

25A−Flanged JIS10K
25A−Flanged JIS20K
or 25A−Socket weld

Body

Float

Cast iron
Stainless steel
Carbon steel
Cast ironCast steel
Cast steel

Stainless steel（6）25A−Socket weld
Carbon steel

Note :（ 1 ）Complied with JIS C 0920
（ 2 ）Switch model is applied on ○ and □. 3 or 4 for ○ and 6 or 8 for □.
（ 3 ）“3” means one（1）micro-switch SPDT built-in, “4” means two（2）micro-switches built-in, “6” means two（2）stage micro-switches built-in, “8” means two（2）×two（2）stage micro-switch built-in.
（ 4 ）Above 0.8 is available.
（ 5 ）Max. temperature shows for ﬂuid.
（ 6 ）Flange connection for SLDI and SLDH is available on request.

■ Max.ﬂuid pressure and temperature
14.3MPa 339℃
14.3
Max. pressure MPa

3 or 4 for ○ and 6 or 8 for □.

10.0MPa 312℃

SLDS○△△

11Switch model is applied on ○ and □.
△△ a p p l y S A , M A , H A , M A R , H A R

10.0（for alternative current）, SD or MD（forSLDH○△△
6.3MPa 280℃direct current）as following table which isdepending on ambient temperature.

6.3
Saturated steam

SLDI○△△
2.0MPa 215℃

Level switch

2.0
1.0

SLG○△△SLS○△△・SLN□△△・SLL○△△（SLDL○△△）
0100
184200300
215280312 339

Fluid temperature ℃■ Max. temperature of switch mechanism
Following table shows for splash proof and water tight switch housing.

Ambient temperature ℃

1004500

SLG○MASLDL○MASLL○MA
SLS○MA
SLN□MA

SLG○HASLDL○HASLG○SASLDL○SASLL○SASLS○SASLN□SASLG○MASLDL○MA

SLG○HARSLDL○HARSLDS○HASLDH○HASLDI○HA60100

SLG○MARSLDL○MAR150

SLDI○MA215

SLDS○MA

SLDH○MA280

312339Liquid temperature ℃

Remarks 1. SA is for normal temperature, HA is for medium temperature and HA is for high temperature.
2. For direct current, SD substitute for SA and MD substitute for MA.

223

Type Level switch■ Dimensions for external ﬂoat type838383

HG3/4G3/4HHH83

G3/4CCCC

G3/4φDφDφDEKE

EEA

A

A

AKφDKK①Model SLG（Flanged）②Model SLG（Welded）③Model SLD（Flanged）④Model SLD（Welded）
（mm）

No.

①

②③ModelE
153
155
180153
180
200242200
242300SLG○SA, MA
SLG○SA, MA, HA
SLDL○SA, MA, HA
SLG○SA, MA, HA
SLDL○SA, MA, HA
SLDI○MA, HA
SLDH○MA, HA
SLDI○MA, HA
SLDH○MA, HA
SLDS○MA, HA

A
61.5
65.5
65.5
65.5
65.5
93108
93108
144

K110128
135110135165200
165200160

Body material

D150160
170160170200230200230205

Size and connection

Cast iron

25A−JIS10K FF
25A−JIS20K RF
25A−JIS20K RF

Cast steel
Cast steel

Socket weld 25A−Sch40
25A−JIS63K RF
25A ANSI1500 RF
Socket weld 25A−Sch80
Socket weld 25A−Sch160
Socket weld 25A−Sch160

Cast steel
Cast steel
Carbon steel■ Dimensions for internal ﬂoat type
Model SLN

Model SLL

146

100A-JIS10K
63.5

209.5

G3/4

Set point224

18φ175
φ210

Set point

75

φ76.3

φ76.3
Set point

75150

at sp.gr.:1.0

Set point

Min 300

18150

φ76.3

150

55±20
at sp.gr.:1.0φ175
φ210

Min 300

Max 6000, Min 450

18Min 300
Min 300

Max 6000, Min 700

φ76.3

φ76.3

100A-JIS10K

Min 15063.5

φ175
φ21055±20
at sp.gr.:1.0

G3/4

63.5

100A-JIS10K83

Max 6000, Min 550

G3/4

146

209.5

83

55±20246

309.5

83

Model SLS

11
Level switch④Dimension

Level switch■ Dimensions for switch housing
1. Splash proof type
①②83

③④83

H

H

Carea,10minutes and at installedposition.

CCCindication of leakage at the test of（For indoor） vertical watering, for 180degrees

G3/4

G3/4

G3/4

Complied with JIS C 0920 : Noproof type

HG3/4●Splash83

H83

2. Water tight type⑤⑥

●Water tight Complied with JIS C 0920 : NoH

G3/4

by the 12.5mm nozzle and 10m

G3/4

statical head, 15minutes and atCC

installed position.

CG3/4

indication of leakage at the test

（For outdoor） of watering from any direction,

C

G3/4type

95

95
HH

⑧H

95

95

⑦Switch housing№

11①Level switch②③④Dimension
HC
45.5

Model（Splash proof type）
SLG○SA, MA, HA, 10K
SLG○SA, MA, HA, 20K
SLDL○SA, MA, HA
SLL○SA, MA
SLS○SA, MA
SLN□SA, MASLG○MAR, HAR, 10K
SLG○MAR, HAR, 20K
SLDL○MAR, HAR
SLDI○MA, HA
SLDH○MA, HA
SLDS○MA, HA

146

Switch housing№

41.5⑤45.5
246
146
146
206

⑥69.5
65.5
66.5

⑦264

⑧192

Type（Water tight type）
SLG○SA, MA, HA, 10K
SLG○SA, MA, HA, 20K
SLDL○SA, MA, HA
SLL○SA, MA
SLS○SA, MA
SLN□SA, MA
SLG○MAR, HAR, 10K
SLG○MAR, HAR, 20K
SLDL○MAR, HAR
SLDI○MA, HA
SLDH○MA, HA
SLDS○MA, HA

Dimension
HC45.5
158

41.5

49.5
258
73.5
158
15825869.5268
196

Remark : Switch model is applied on ○ and □. 3 or 4 for ○ and 6 or 8 for □.

■ Electrical rating
ModelSA

Max. temperature
（℃）
（1）
70℃

Connection : SPDTSA, MA and HA use micro-switch forRating
Resistance load

Induction load

AC125V, 250V：15A

AC125V, 250V：10A

DC125V：0.5A
DC250V：0.25A

DC125V：0.05A
DC250V：0.03A

AC125V, 250V：15A

AC125V, 250V：15A

DC125V：0.5A
DC250V：0.25A

DC125V：0.05A
DC250V：0.03A

AC125V, 250V：1A

AC125V, 250V：1A

DC30V：1A
DC125V：0.5A

DC30V：1A
DC125V：0.4A

MA120℃

HA

260℃

（2）
SD

70℃DC125V：10A
DC250V：3A

DC125V：6A
DC250V：1.5A

MD（ 2 ）

120℃

DC125V：10A
DC250V：3A

DC125V：6A
DC250V:1.5A

Note （ 1 ）: Aﬀect on switch and not ﬂuid temperature.
（ 2 ）: AC is available.

225

AC（available for DC）.
SD and MD are large rating for DC.
DC switch mechanism for HA is notproduced by FUSHIMAN.

Level switch■ Selection of level switch● Internal ﬂoat type（Installed on the top of tank）○ SLS

For level control

Make start and stop the pump
Large diﬀerential○ SLL

For level alarm○ SLN

For level alarm

Make alarm at high or low liquid level
Diﬀerential : approx. 55mm
Make alarm at high and low liquid level
Diﬀerential : approx. 55mm

● External ﬂoat type（Installed on the side of tank）
○SLG
○SLDL
Make alarm at high or low liquid level

For level alarm

○SLDI
○SLDH
○SLDS

■ Selection of switch mechanism
Switch model

Composition③

Switch mechanism 1set withmicro switch 1pc④

Used forSwitch mechanism 1set withmicro switch 2pcs

SLG, SLDL, SLDI, SLDH,SLDS, SLS, SLL

Switch mechanism 2sets withmicro switch 1pc11SLN■ Selection depending on ﬂuid temperature and ambient temperature
Please refer to “Max. ﬂuid pressure and temperature” and “Electrical rating”.

■ Code selection
Example：SLG

4MAR

Splash proof

ExampleSpeciﬁcation : Indoor, Install on the side of tank
Liquid level, High alarm, Make pump stopa. Modelb. Switch mechanism

2.0MPa, 214℃, Liquid speciﬁc gravity : 0.85,
Ambient : room temperature
a. Check external ﬂoating depending on installation, pressure,temperature and speciﬁc gravity.

c. Max. temperature of switch mechanism

Select SLG from “Speciﬁcations of body and ﬂoat” and “Max. ﬂuid
pressure and temperature”.

d. Switch housing

b. Select 4 from “Selection of switch mechanism”.
c. Select MAR from “Max. temperature of switch mechanism”.
d. Select Splash proof depending on indoor installation.

226

Level switch

Switch mechanism 2sets withmicro switch 2pcs