Instruction Manual
Installation Instructions
PHOTOSWITCH® Liquid Level and Resistance Sensing Control
Bulletin 13DJ3-3000
IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.
Product
D
a
t
a
De
sc
r
i
p
t
i
on
The
PHOTOSWITCH
Bulletin
13DJ3
S
er
i
es
3000
i
s
a high
s
ens
i
t
i
vi
ty
Liquid
Le
v
e
l
C
on
tr
o
l
designed
to
detect the
le
v
e
l
of
conductive
liq
u
id
s
or
s
o
lid
s
with
a moisture content as
low
as
5%.
Fea
t
u
r
e
s
•
V
e
r
y
high
s
e
n
s
itiv
ity
—
up
to
60 megohms cm
liquid
r
e
s
is
tivity
•
Compact,
a
ll
s
o
lid
state, plug-in, modular design
for
r
e
lia
b
ility
with
f
l
exi
bi
li
ty
•
DPDT
EM
relay and 12V DC
s
ol
i
d
state outputs.
Opt
i
onal
s
ol
i
d
s
t
at
e
logic outputs
•Low
probe voltage isolated
from
lin
e
v
o
lta
g
e
•
Fast response
tim
e
•
Wide selection
of
probe
a
ss
e
m
b
lie
s
•All
molded parts
of
rugged,
i
m
pact
r
es
i
s
t
ant polyphenylene oxide
(PPO) and polystyrene (PS)
•
Heavy-duty easy
to
w
ir
e
te
r
m
in
a
ls
•High
voltage connections isolated
from low v
o
lta
g
e
•
Ambient temperature range:
-
40 to 135°F (-40 to 57
°
C
)
G
e
n
e
r
a
l
The
Bulletin
13DJ3
S
er
i
es
3000
C
onduct
i
ve
Liquid
Level Control
i
s
designed
to
provide a reliable
le
v
e
l
detection
of
conductive
liq
u
id
s
or
s
o
lid
s
.
No
moving parts
or
f
lo
a
ts
are required.
M
e
ta
l
probe rods are
placed
in
th
e
conductive
liquid
at the
d
e
s
ir
e
d
levels. The
liquid or
s
o
lid
c
ondu
c
tiv
e
m
a
te
r
ia
l
completes the
circuit
between the probe rod
or
rods
to
the
m
e
ta
l
m
a
te
r
ia
l
container.
If
the container
is
non-conductive
(
f
ib
e
r
g
la
ss
,
c
e
m
e
n
t,
etc.), an
a
dd
itio
n
a
l
probe rod
is
used as a grounding
probe
to
complete
th
e e
le
c
tr
ic
a
l
circuit. Completion
of
the
circuit will
cause the output relay
to
operate. The relay contacts may be used
for
pump, valve,
or
motor
control;
audible and/or v
is
u
a
l
le
v
e
l
in
d
ic
a
tio
n.
The controls
will
operate over a
r
e
s
is
tivity
range
of 0 to
60
M
e
g
O
h
m
s
c
m
. This permits the sensing
of
liq
u
id
s
or
solids
with
very
low
conductivity
s
u
c
h
as a
n
tibio
tic
s
,
r
e
f
r
ig
e
r
a
n
ts
,
or
sand
with
a
moisture content as
low
as
5%.
In
addition
to
high
s
e
n
s
itiv
ity
,
the
c
on
tr
o
l
has a
f
a
s
t
response time and
c
a
n be wired
for
electronic
c
on
tr
o
l
latching on certain applications,
a
llo
w
in
g
th
e
use
of
both sets
of
relay contacts
for
e
x
te
r
n
a
l
lo
a
d
s
.
A
s
o
lid
-
state output
s
ig
n
a
l
can be obtained
from
the
c
on
tr
o
l
s
im
u
lta
n
e
ou
s
ly
with
a relay output. This
s
ig
n
a
l
can be used
for
electronic counting,
d
a
ta
logging,
or
f
ee
d
in
g
in
f
o
r
m
a
tio
n
to
a
computer.
The
c
on
tr
o
l
has protection against
f
a
ls
e
operation due
to
lin
e
v
o
lta
g
e
transients,
lin
e
voltage dropouts
of
1/2 second
or
less,
or
during in
itia
l
power up. These
f
ea
tu
r
e
s
a
llo
w
the 13DJ3 Series 3000
C
on
tr
o
l
to
be used
in
s
o
lv
in
g
the more
difficult in
du
s
tr
ia
l
le
v
e
l
a
pp
lic
a
tio
n
s
.
R
e
s
is
t
a
n
c
e
Sensing
C
o
n
t
r
o
l
PHOTOSWITCH
Bulletin
13DJ3
is
also designed
to
be used as a
r
e
s
is
ta
n
c
e
sensing control.
In
this application the
c
on
tr
o
l
operates as an
e
le
c
tr
on
ic
s
witc
h
which converts the minute current
flow
through delicate
m
e
c
h
a
n
ism
s
or
extremely
light
contacts
into
a
s
witc
h
in
g
output
capable
of
h
a
nd
lin
g
r
e
la
tiv
e
ly
heavy
e
le
c
tr
ic
a
l
loads. The maximum
s
e
n
s
itiv
ity
of
the
control
when used
for
resistance sensing
is
15
m
e
goh
m
s
.