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Instrumentation and Control Volume 1 of 2 | Next
Conductivity Probe Method |
Level Detectors
LEVEL DETECTORS
Figure 5 Ball Float Level Mechanism
The travel of the ball float is limited by its design to be within ±30 degrees from the horizontal
plane which results in optimum response and performance. The actual level range is determined
by the length of the connecting arm.
The stuffing box is incorporated to form a water-tight seal around the shaft to prevent leakage
from the vessel.
Chain Float
Figure 6 Chain Float Gauge
This type of float gauge has a float ranging in
size up to 12 inches in diameter and is used
where small level limitations imposed by ball
floats must be exceeded. The range of level
measured will be limited only by the size of the
vessel.
The operation of the chain float is
similiar to the ball float except in the method of
positioning the pointer and in its connection to
the position indication. The float is connected to
a rotating element by a chain with a weight
attached to the other end to provide a means of
keeping the chain taut during changes in level
(Figure 6).
Rev. 0
Page 5
IC-03
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