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pH and pH/ORP Sensors
Sensor Module Replacement
EXO pH and pH/ORP feature replaceable sensor modules due to the electrolyte depleting characteristics
necessary to make such measurements. We recommend that users replace these modules as necessary,
typically one to two years if stored properly in the provided storage solution when not in use. Working
life will depend on the conditions of the deployment environment. Perform this procedure in a clean, dry
laboratory environment.
1 Remove old sticker and plug.
Peel o and discard the old sticker that covers the junction
of the sensor body and the module. en, with a small,
at-blade screwdriver, remove the small rubber plug from
the gap in the hard plastic ring at the base of the sensor
module.
Caution: Always exercise extra care when using sharp or
potentially harmful instruments.
2 Remove and discard old sensor
module.
To remove, perform two motions simultaneously.
1.With your ngers, squeeze the sensor module’s hard
plastic ring so that it compresses the gap le by the
rubber plug.
2.Steadily pull the sensor module straight back from the
sensor body, rocking slightly if necessary.
Note: e act of removing the old sensor module
renders the o-rings on the module unusable. To prevent
catastrophic leaks, do not attempt to reinstall a module
with damaged o-rings.
Discard the head according to your organization’s
guidelines, or return it to manufacturer for recycling.
3 Inspect and service connector cavity.
Inspect the connector cavity of the probe body for debris
or moisture. If detected, remove it with a lint-free cloth or a
gentle blast of compressed air.
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