User guide

RevA MN300282 27of34
INSTALLATION(cont.) StepSeven
Fitting Selection:  Check the part number to determine the required fitting mount size and thread type.
EchoSwitch®iscommonly installedintankadapters,flanges,bracketsorstandpipes.Note:Alwaysincludethe
gasketwheninstallingtheEchoSwitch®.
1. TankAdapter:Selectatankadapterfitting,suchastheLM52‐1890fortheLU74SeriesortheLM52‐
2890fortheLU74&LU78Series.
a. For best results, select a 2” tank adapter and add a reducer bushing such as the LM52‐1400,
threadxthread,reducerbushing.
b. Avoid tank adapter (thread x thread) styles and/or pipe stops forward of the installed
transducer.
c. Alwaysmountthetankadaptersothemajorityofthefittingisoutsidethetank.
i. Never mount the tank adapter upside down or the bulk of the  material is inside the
tank.
2”TankAdapter
SocketxThread
TankAdapter
w/2”x1”ReducerBushing
TankAdapter
ThreadxThread

Donotusethreadxthread

2. Riser:Installationswithtall,narrowriserscanimpedetheacousticsignal.
a. Core Out Concrete:Applications where tank a concrete tank ceiling that has been cored out
can also be considered as a riser type application. In these applications a 2:1 ratio (Inner
DiametertoCoreHeight)forthediameterofthecore.
b. LU74 & LU78 Series: 2” (5 cm) diameter risers should be no taller than 5” (12.7 cm).Larger
diameterrisersshouldbenotallerthan12”(30.5cm).
c. LU77Series:

RiserSpecifications
Inner
Diameter
Maximum
Height
2”(5cm)
4”(10cm)
6”(15cm)
3”(7.6cm)
8”(20cm)
12”(30cm)
Note:Donotexceedthedimensionslistedabove.


Note: If attempting to raise  the
sensorabovethetopofthetank
toallowforahigherfillcapacity,
avoid the use of tall and narrow
risers.The example to the left
exceeds the dimensions listed in
the Riser Specifications chart.

Use a larger tank adapter which
takes into account the Riser
Specifications.
