Quantcast Table 7-1. Level Meter Selection Guide

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TABLE 7-1. Level
Meter
Selection
Guide
Application Requirements
Submerged
and  Site  Conditions
Bubbler
Ultrasonic
Probe
Factors
Affecting
Accuracy
Performance
Silting  in
Excellent
Use
with
caution Very  good*
Not
recommended
High
crosswinds
Excellent
Excellent
Floating
debris
Poor
Excellent
Ecellent
Ecellent
Suspended
solids
r e c o m m e n d e d  Very  good*
Not
(high
concentration)
High  grease  concentration
Not  recommended
Very  good*
Excellent
F o a m  on  liquid
Excellent
Not
recommended
Excellent
Excellent
Narrow
channel
Excellent
Use  with  caution
Factors
Necessitating
Onsite
Maintenance
Maintenance
Required
Silting
in
Often
None to
None
occasional*
Suspended
solids
None  to
Often
None
occasional*
High
grease
concentration
Often
None
occasional*
Channel
Application
Installation
Weirs  and  flumes
Very  easy
Easy
Very easy
Small  round  pipes
Moderately
easy
Easy
Very easy
Difficult
Large  round  pipes  with
Easy
Difficult
swift  current
Somewhat
Easy
Irrigation  channel  or
Somewhat
difficult
small  stream
difficult
Difficult
Easy  (if  struc-
River  or  other  large
Difficult
ture  over
stream
stream
exists)
*Probes
are
only
affected
by
a
mixture
of
grease
and
solids.
7-11





 


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