Ocean Optics pH Sensor Patches, Probes and Cuvettes - Manual (Page 9)

1: Products
PHSENSOR-TRANS-REFLECT-201111 3
5. The cap for the transmissive probe screws off. The probe uses a thin sensing film with
adhesive on one side; peel the patch into its two pieces, sometimes a razor-blade or long
finger-nails aide with this. Discard the non-transparent, non-sticky half. Keep the optically
transparent half that has one adhesive side (this is the sensor half). This can be firmly
affixed to the lens of the probe. Re-screw the cap back on the probe tip.
Probe Assembly Description
The picture below shows the individual components of the transmissive dip probe. Using a 0.05” Allen
key, the set screws at the base of the T-300 sleeve can be loosened and the sleeve can be removed from
the RE-BIF-BORO bundle. At the factory, the position of the fiber bundle in the sleeve is optimized for
best back reflection in liquid medium, and locked in that position.
Storage/Lifetime
Probes can be stored dry at room temperature for any amount of time. As a rule, once the maximum
absorbance at pH 11 falls below 0.1, the patch should be discarded and replaced (assumes a
reference of pH 1). The patch’s lifetime depends on frequency of use, harshness of the samples it is
exposed to, the temperature of samples, and other environmental factors.