4
World Precision Instruments
INSTRUMENT DESCRIPTION
Structure of the Sensor
The basic structure of the
ISO-OXY-2
and the
OXELP
sensors is shown below (
Fig. 3
).
The figure shows an
ISO-OXY-2
connector.
Fig. 3—ISO-OXY-2 Sensor assembly
Gas permeable, polymeric membrane covering the end of the stainless sleeve to
separate it from the external environment
Disposable, protective stainless steel sleeve (WPI#
5378
) that houses the sensitive
electrode pair. The sleeve is flanged to properly connect with the locking cap. It
must contain fresh electrolyte (WPI#
7326
).
Internal O
2
-sensing pair of working and counter (reference) electrodes
Probe handle
Locking cap attaches the sleeve to the probe handle
When the sensor is fully assembled (with locking cap and sleeve in place) the internal
electrode should press gently against the polymeric membrane, which will be
slightly
stretched
. This ensures that the electrolyte diffusion is as thin as possible, minimizing
sensor response time.
NOTE
: Once a membrane is stretched it is permanently deformed and cannot be
reused if the sleeve is removed from the electrode.
Additional membrane sleeves are available in packages of 4 with electrolyte filling
solution (WPI #
5378
). The start-up kit (WPI #
5377
) also includes replacement
membrane sleeves, along with all the accessories to fill them properly with electrolyte
solution.
Содержание ISO-COP-2
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