Flowline LU74, LU78 Operating Manual

EchoSwitch®

Ultrasonic Liquid Switch and Transmitter

LU74 & LU78 Series Quick Start

©2019 Flowline, Inc.
All Rights Reserved
Made in USA

Flowline, Inc. | 10500 Humbolt Street, Los Alamitos, CA 90720 p 562.598.3015 f 562.431.8507 w flowline.com QS300282 Rev B

WELCOME TO THE ECHOSWITCH® QUICK START

The EchoSwitch® Quick Start provides basic mounting, setup and use instructions for getting the
EchoSwitch
not addressed here, please refer to the EchoSwitch

®

up and running quickly. If you have a non-standard installation or setup requirement that is

®

Manual or other support documentation located at

flowline.com.

WE DO YOUR LEVEL BEST

Thank you for purchasing EchoSwitch®. The sensor provides integrated LCD and three push-button
configuration. This quick start includes everything you’ll need to get the sensor up and running.

COMPONENTS

Depending on how the sensor part number that was shipped, EchoSwitch® comes with a Viton® gasket for
installation and the Quick Start.

ECHOSWITCH

LU74-5004 & LU74-5064

®

Viton® gasket (2”)

P/N: 200129

LU78-5004 & LU78-5064

ENCLOSURE

While the switch housing is liquid-resistant the EchoSwitch® is not designed to be operational when immersed.
It should be mounted in such a way that the enclosure and transducer do not come into contact with the
application media under normal operational conditions. The enclosure has a flip cover with dual 1/2” NPT
female conduit ports and an internal terminal strip for wiring. Before closing the enclosure, make sure that the
enclosure gasket is properly seated, and that any conduit fittings, cable connectors or plugs are installed
correctly and sealed. Note: If using the Flowline LM90-1001 (liquid tight fitting) on the ½” conduit, the cable
minimum is 0.170” (4.3mm) and the maximum is 0.450” (11.4mm).

| 2 QS300282 Rev B

MOUNTING THE ECHOSWITCH®

The sensor should always be mounted perpendicular to the liquid surface using the provided Viton® mounting
gasket. Insure that there are no restrictions or obstacles in the path of the acoustic signal. For further

®

mounting information, please refer to the EchoSwitch

manual at www.flowline.com.

Mounting with a Tank Adapter:

Select a tank adapter fitting, such as the LM52-2890.

Mounting in Riser:

As installations with tall, narrow risers can impede the
acoustic signal. 2" diameter risers should be no taller than
4". Larger diameter risers should be no taller than 12".
For best results, follow a 2:1 Height to Inner Diameter
ratio (example: 8” High to 4” Inner Diameter).

Mounting in Side Mount Bracket:

Use Flowline's LM50-1001 side mount bracket.

LM50-1001 Shown

Note: The Side Mount Bracket (LM50 series) is not designed for use with stand pipes or as a method to
secure stand pipes. There are too few threads to properly hold the sensor and the stand pipe.

QS300282 Rev B 3 |

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RTANT MO

UNTING GU

DELINES

) Never m

) Liquid s

) Mount a

) Never m

) Do not o

) Do not i

Mo

nting with

st

nd-pipe m

incr

ase perfor

pipe

is 3”. Larg

red

cer bushing

tank

adapter (S

sen

or (see exa

The

pipe length

to prevent

time
equ

lization hol

sou

ces of subs

unt the se

ould never

least 3” fro

unt the se

struct the

stall in the

Stand-Pi

y be used t

ance in he

r diameter
. Avoid the
x T or S x S
mple below

should run

foam from

within the

antial turbu

sor at an a

nter the de

the side

sor in a va

ensor’s be

enter of a

e:

dampen t

vy vapor.

ipes can b

use of multi

) and conn

.

he measur

ntering the

ensor’s de

ence which

gle.

ad band.

all.

uum.

m width.

ome top ta

rbulence, s

hen moun

used. Th

ple pipe fitti

ct the pipe

ment span
pipe. Cut t

d band. L

might caus

k.

parate sur
ing the sen
pipe shoul

gs when p

o the inside

nd the bott

e bottom e
cate the st

the liquid i

ace foam fr

or in a sta
be attach
ssible. An

slip and us

om of the pi

d of the pi

nd-pipe aw

n the pipe t

m the poin
d-pipe, the
d with a co

ideal moun

a reducer

pe should r

e at 45° an

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oscillate.

of measur

minimum di

pling or tan
would be t
bushing to

main subm

drill a 1/4”

p outlets a

ment or

meter of th

k adapter a

select a 3”
ttach the

erged at all

pressure
d/or other

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d

3” x 2”
Reduc

(T x T)

r Bushing

3” (S x
Tank

T)

dapter

Vent

ole

3” PV

Pipe

Stand-

ipe Exam

le

Stand-Pip

Mounting

| 4

QS300282 Rev