4
of
14
MN301030
Rev
B
DIMENSIONS
Step
Three
Technology:
A
pressure
transmitter
is
installed
near
or
on
the
bottom
of
the
tank
by
way
of
a
¼”
NPT
thread.
A
stainless
steel
pressure
diaphragm
within
the
pressure
transmitter
is
exposed
on
one
side
to
the
application
fluid.
The
amount
of
pressure
applied
to
the
sensing
surface
will
slightly
deflect
the
diaphragm.
The
deflection
of
the
diaphragm
is
measured
by
a
built
‐
in
microprocessor
that
provides
greater
linearity
correction
over
common
thermal
compensation
methods.
A
4
‐
20
mA
current
signal
proportional
the
height
of
the
liquid
or
the
pressure
of
the
gas
is
generated
from
the
microprocessor.
Cable
Series
(LD30
‐
S_01)
Conduit
Series
(LD30
‐
S_11)
Material
Compatibility:
The
LD30
series
is
made
of
316
Stainless
Steel
(316
SS),
316L
Stainless
Steel
(316L
SS).
The
Cable
Version
(LD30
‐
S_01)
is
provided
with
3’
(0.91
m)
of
cable.
The
Conduit
Version
(LD30
‐
S_11)
is
provided
with
a
junction
box
(including
a
terminal
strip)
and
a
½’
NPT
conduit.
The
total
length
the
signal
can
transmitter
is
based
upon
the
following
formula:
o
RLmax
=
(Vsup
–
13V)
/
0.02A,
RLmax
is
the
total
resistance
including
the
load
and
the
cable
length.
Make
sure
that
the
switch
is
compatible
with
the
application
liquids.
To
determine
the
chemical
compatibility
between
the
sensor
and
its
application
liquids,
refer
to
the
Compass
Corrosion
Guide,
available
from
Compass
Publications
(858
‐
589
‐
9636).
