SR50A Sonic Ranging Sensor
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5 Maintenance
The SR50A’s electrostatic transducer requires equal pressure
on both sides. Vent holes in the transducer housing are used to
equalize pressure. Desiccant is placed inside the transducer
housing to prevent the possibility of condensing humidity. The
desiccant must be inspected and, if required, replaced on a
regular basis. The desiccant supplied with the SR50A uses an
indicating silica gel and will remain blue if it is still capable of
absorbing moisture. Once the desiccant becomes saturated the
color will change from blue to pink. If the SR50A is used in
humid environments, the desiccant should be replaced more
frequently. To inspect or replace the desiccant, follow the
procedures outlined in Section 7 under disassembly.
The 5 small desiccant packets used in the transducer housing
are part number L4091, which are included with C2158 or can
be purchased individually or in bulk (DSC 20/M).
It is recommended that the transducer housing assembly (part #
C2158
–
Transducer Maintenance Kit) be replaced every 3
years.
If the SR50A is used in an environment with high humidity, it
is recommended that the transducer housing assembly be
replaced every year.
