K-Patents PR-23 User Manual

9 Sensor specicaons
129
9.9 Saunders body refractometer PR-23-W
The Saunders body refractometer PR-23-W is a heavy-duty instrument designed for
chemically aggressive liquids and ultra-pure ine chemicals in large-scale production
and in large pipelines. The materials and design of the sensor are similar to the Te-
lon body refractometer PR-23-M, but the Saunders body makes it possible to it this
refractometer into 50, 80 or 100 mm (2", 3" or 4") pipelines.
The Saunders body material is graphite cast iron lined with 3 mm PFA (Fluorinated
ethylene propylene) or ETFE (Ethylene tetraluoroethylene) luoroplastic. The cast
iron provides a solid mechanical base and the PFA/ETFE lining ensures the chemical
resistance.
The sensor itself is built just like the PR-23-M sensor (see Section 9.8) and it is ixed to
the Saunders body in the same way, with a sapphire plate and a Kalrez O-ring to keep
all the metallic parts away from the process liquid.
PTFE wetted parts
Sapphire plate
O-ring (Kalrez)
Prism
Flow cell adapter
(AISI 316L)
Graphite cast iron
Saunders valve body flow cell
F
L
O
W
PR-23-W Sensor
PFA/ETFE
Figure 9.28 PR-23-W Saunders body sensor

K-Patents PR-23 Specifications

General

Brand	K-Patents
Model	PR-23
Category	Measuring Instruments
Language	English