Material
OD
8
SUS
SPST
50
W
300
Vac
/350
Vdc
OD
9.5
SUS
SPST
50
W
300
Vac
/350
Vdc
SPDT
20
W
150
Vac
/200
Vdc
OD
12.7
SUS
SPST
50
W
220
Vac
/500
Vdc
SPDT
50
W
400
Vac
/1000
Vdc
0.5
A
0.5
A
1
A
3
A
1
A
2.5
A
2.5
A
2
A
4
A
2
A
Tube
Type
Switching
Contact
from
Switching
Capacity
Max
.
Switching
Voltage
Max
.
Switching
Current
Max
.
Carry
Current
Max
.
FD7 Series
Explosion Type Magnetic
Float
Level
Switch Operation
Manual
PRINCIPLE
INDUCTIVE
/
CAPACITIVE
LOADS
1) O
pen
the
cap
of
housing
,
connect
the
wire
onto
terminal
through
the
conduit
.
2) C
heck
the
terminal
wire
connection
is
correct
for
each
float
.
3)
Connection
Type
: Please refer to Fig.1 below.
A
) 1
NO
:
Meaning
that
the
NO
-
C
circuit
will
be
close
while
liquid
level
higher
than
the
float
ball
by
mark
of
"
ON
".
B
) 1
NC
:
Meaning
that
the
B
-
C
circuit
will
be
close
while
liquid
level
lower
than
the
float
ball
by
mark
of
"
ON
".
C
)
1
C
:
Meaning
that
the
NO
-
C
circuit
will
be
close
while
liquid
level
higher
than
the
float
ball
and
NC
-
C
circuit
will
be
close
while
liquid
level
lower
than
the
float
ball
.
4)
Please
screw up
the
housing
cap
and
fix
the
conduit
outlet
to prevent
the
moisture
to
soak in.
CONNECTION
INFORMATION
SPECIFICATION
WIRING
1
NO
1
C
1
NC
1
NO
1
C
1
NC
1
NO
1
C
1
NC
2
NO
2
C
2
NC
2
NO
2
C
2
NC
2
NO
2
C
2
NC
3
NO
3
C
3
NC
4
NO
4
C
4
NC
5
NO
5
C
5
NC
3
NO
3
C
3
NC
3
NO
3
C
3
NC
4
NO
4
C
4
NC
4
NO
4
C
4
NC
5
NO
5
C
5
NC
5
NO
5
C
5
NC
1
3
2
4
5
SPECIFICATION
(Fig.1)
1.Inductive
:
When
using
a
reed
switch
with
inductive
loads
such
as
motors
,
relays
,
solenoids
..
etc
,
the
contact
will
be
subjected
to
a
high
induced
voltage
during
opening
of
the
contact
(
load
circuit
).
Such
high
induced
voltage
(
transients
)
may
cause
damages
to
the
reed
switch
or
significantly
reduce
it
life
.
Therefore
,
protective
circuits
such
as
:
RC
(
snubber
),
varistors
or
clamping
diodes
are
recommended
.
2.Capacitive
:
When
using
a
reed
switch
with
capacitive
loads
such
as
capacitors
,
incandescent
lamps
or
long
cables
,
the
contact
will
be
subjected
to
a
high
surge
(
inrush
)
current
.
Therefore
,
protective
circuits
such
as
:
surgesuppressors
or
current
limiting
resistors
are
recommended
.
NEPSI Ex d IIC T3~T6 Gb
ATEX II 2 G Ex d IIB T3 or T4 or T5 or T6 Gb
II 2 D Ex tb IIIC T200
B
C or T135
B
C or T100
B
C or T85
B
C Db
IECEx Ex db IIB T3 or T4 or T5 or T6 Gb
Ex tb IIIC T200
B
C or T135
B
C or T100
B
C or T85
B
C Db
The
single
unit
or
multiple
reed
switch
units
are
housed
tightly
in
stainless
steel
stem
and
tount
the
float
ball
to
penetrate
through
the
stem
,
then
the
liquid
buoyancy
will
deliver
the
float
up
and
down
at
the
specified
position
by
graduating
rings
.
When
the
reed
switch
is
induction
the
float
internal
magnet
,
then
it
will
actuate
the
reed
switch
contact
point
to
create
an
open
or
close
circuit
.
We
can
apply
such
on
-
off
output
signal
to
reach
liquid
level
controlling
and
monitoring
purpose
.
The
permanent
magnet
is
interlined
into
the
middle
of
the specified
float
balls
.
You
Can
mhe
figures
below
show
the
float
orientations
on
N
.
O
. (
Normal
Open
)
and
N
.
C
.
(
Normal
Close
).
2
2
SUS floats is 35kg/cm (S10 floats can reach 50kg/cm )
2
1.
Pressure
Rating
:
Max. pressure of plastic floats is 5kg/cm and max. pressure of
2.
Lead
Wire
:
XLPE
(
UL
3266,
AWG
22)
APPLICABLE MODEL:FD7 Series
ATEX