User guide

26of34 MN300282 RevA
INSTALLATION StepSeven
The EchoSwitch® should always be mounted perpendicular to the liquid surface and installed using the
provided Viton® mounting gasket.Make sure that the fitting and transmitter threads are not damaged or
worn.Always hand‐tighten the transmitter within the fitting.Perform an installed leak test under  normal
process conditions prior to system start up.Note: The preferred mounting fitting for the LU77 Series is the
LM52‐1400(2”threadx1”thread)reducerbushing.
MountingGuide
1. Donotmountatanangle.
2. Liquidshouldneverenterthedeadband.
3. SideWall:
a. Mountatleast3”fromthesidewall.
b. ForLU77Series‐mountatleast2”fromthe side
wall.
4. Donotmountwhereobstacleswillintrudeintosensor’s
beamwidth.
a. BeamWidth:3”(7.6cm)diameter[2”(5cm)for
LU77series].
5. Donotmountinavacuum.
6. Avoidmountinginthecenterofadometoptank.
7. Inconebottomtank,positionthesensoroverthe
deepestpartofthetank.
Installationinexistingfittings:Iftheexistingfittingislarger
than the threads of the EchoSwitch®, select a reducer
bushing such as the LM52‐1400 (2” thread x 1” thread) or
LM52‐2400(3”threadx2”thread).

LM52‐1400

LM52‐2400
Donotinstallat
anglerelativeto
theliquid.
Donotinstall
within2”oftank
sidewall.
(3”forDL34series)
Donotinstallwith
objectsinthe
beam.
Donotinstallin
applicationswith
vacuum.

Metal Tanks (LU77 Series Only):Flowline ultrasonic sensors have been optimized for use in non‐metallic
fittings.
1. Forbestperformance,avoidtheuseofmetallicfittings.
a. Useaplastic2”x1”reducerbushing,suchastheLM52‐1400oraplastic1”flange,suchasthe
LM52‐1850formetallictanks.
2. While installations directly into a 1” metal fitting are not recommended, acceptable results may be
obtained if the 1” fitting is a half coupling in form and the outer diameter of the coupling is tightly
wrappedinvinyltapetodampenvibration.
