K-Patents PR-03 - Manual (Page 87)

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8 Sensor specifications and other sensor information 81
8.6 Process refractometer PR-03-M
K-Patents Process refractometer PR-03-M is de-
signed for use in chemically aggressive solutions
and ultra-pure fine chemical processes. It has a
built-in flow cell designed to keep all metal and
other easily corroding parts from coming into con-
tact with the process liquid. All the wetted parts
are made of non-metallic materials, either PTFE
(Teflon
R ) or PVDF (Kynar R ), and thus the
PR-03-M sensor withstands corrosion very well.
The flow cell (N) and the sapphire plate (L) are
fixed to the stainless steel sensor with four screws.
The flow cell (N) is sealed by a Kalrez O-ring
(M). The flow cell 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 check port (O), which has a 1/8" female
thread connection.
Figure 8.16 PR-03-M sensor
8.6.1 PR-03-M sensor model code
MODEL AND DESCRIPTION MODEL
PR-03 = Sensor PR-03
Sensor classification
-M = Aggressive medium adapter
-M
Refractive Index range limits
62 = 1.310–1.540 R.I. (0.100 Conc% b.w.), Spinel prism
62
74 = 1.260–1.500 R.I., sapphire prism 74
Process line connection
-R = Thread (G 1/2 inch)
-R
-N = Thread (1/2 inch NPT female) -N
Line size connection diameter
-050 = 1/2 inch (flow volume 2-8 l/min (0.5-2.1 GPM))
-050
Flow cell wetted parts material
-PV = Kynar
R (PVDF=Polyvinylidenefluoride) -PV
-TF = Teflon R (PTFE=Polytetrafluoroethylene) -TF
Sensor cover
-SC = Stainless Steel sensor housing
-SC
Sensor options
-PC = adapted for Exproof by purging (A)
-PC
(A) including 5 meter sensor cable, PR-8400-005
Example: Sensor: PR-03-M62-R-050-TF-SC