Page 24 MFA 4p – INSTRUCTION MANUAL 7ML19985FM01
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Applications
Shafts
These methods are viable if the speed is such that the blades or key will provide the
number of pulses required at a minimum velocity of 1.5 m / minute (5 ft. / minute). In
applications where exposed moving parts are required, safety shields and precautions
should be applied.
Where conditions prevent the sensing of buckets, a belt pulley or paddle mounted on an
exposed shaft end, preferably the tail pulley, may be used.
Belt Conveyors
Potential for damage in each application governs the minimum gap allowable. Maximum
gap for operation is 102 mm (4"), optimum 25 mm to 50 mm (1" to 2").
Screw Conveyors
A ferrous mass added behind the flight of a screw conveyor, where it passes the probe
aids Borderline Operation. This mass must be added for all non-ferrous screws.
probe
shaft
added paddle
safety shield not shown
probe
shaft
key in keyway
102 mm (4”) dia. min.
50 x 50 x 25 mm (2” X 2”
X 1") ferrous blocks or
spoked wheel
probe
probe
The probe should be located at the idler end
(usually feed end)
Arrows indicate permissible place-
ment range of the probe
7ML19985FM01.book Page 24 Wednesday, May 21, 2008 2:17 PM
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