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K-Patents PR-23 - 9.8 Teflon Body Refractometer PR-23-MMS

K-Patents PR-23
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9 Sensor specicaons
121
9.8 Teon body refractometer PR-23-M/MS
K-Patents Telon body refractometer PR-23-M/MS is designed for use in chemically
aggressive solutions and ultra-pure ine chemical processes.
PR-23-M is an all-purpose model, PR-23-MS is designed especially for the semicon-
ductor industry. The sensor has a built-in lowcell designed to keep all metal and other
easily corroding parts from coming into contact with the process liquid. All the wetted
parts are made of non-metallic materials, either PTFE (Telon
®
) or PVDF (Kynar
®
),
and thus the PR-23-M/MS sensor withstands corrosion very well.
Figure 9.26 The PR-23-M/MS sensor
Figure 9.26 shows the structure of the sensor. The lowcell (N) and the sapphire plate
(L) are ixed to the stainless steel sensor with four screws. The lowcell (N) is sealed
by a Kalrez O-ring (M). The lowcell prevents any leakage reaching the metal parts,
because there is a circular leakage chamber behind the O-ring (M). The chamber con-
nects to a checkport, which has a 1/8" female thread connection.

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