Vaisala K-PATENTS PR-23 Series, Instruction Manual, Page: 122 / 246

112 PR-23 instruction manual
9.7 Process refractometer PR-23-RP
Process Refractometer PR-23-RP is a heavy-duty refinery model that is designed to
support the unique requirements of the refining and petroleum industries. Typical
applications are in accurate liquid concentration mesurements, e.g. acid in alkylation,
glycol or amines in gas processing and multi-product (crude oil, fuel oil, diesel) in-
terfaces in transfer operations. The main physical properties have been designed in
accordance with ASME VIII Div1 and Div2.
The PR-23-RP comes with user-specified supplementary tests and documents. The
following items can be specified and ordered: metallurgical and material hardness
certification (e.g. compliance with the NACE MR0103 or NACE MR0175/ ISO 15156
standard), API recommended tests and welding documents (e.g. WPS, PQR, WQR,
NDE, radiographic test and hydrostatic shell test), material traceability certification
and the positive material identification (PMI) test. A factory acceptance test (FAT),
site acceptance test (SAT), and customized drawings stating client specific informa-
tion are also available on request.
9.7.1 PR-23-RP sensor model code
MODEL AND DESCRIPTION MODEL
PR-23 = Sensor PR-23
Sensor model
-R = Refinery -R
Sensor type
P = Probe type, wetted materials single piece no weldings P
Refractive Index range limits
-73 = n
D
1.320–1.530 (0–100 Brix) -73
Process connection
-M20 = ANSI-flange 300 lbs, 2 inch, insertion length 130 mm -M20
-J20 = JIS-flange 10k 50A, insertion length 130 mm -J20
Sensor wetted parts material
-SS = AISI 316 L -SS
-HA = Alloy 20 -HA
-HC = Alloy C276 -HC
Electrical classification
-GP = General Purpose -GP
-AX = ATEX and IECEx certified Ex II 3 G, Ex nA IIC T4 Gc (up to Zone 2) (T
amb
-20 ... +65°C) -AX
-IA = ATEX and IECEx certified Ex II 1 G, Ex ia IIC T4 Ga (up to Zone 0) (T
amb
-20 ... +65°C) -IA
-FM = FM Class I, Div. 2, Groups A, B, C & D, T6 (T
amb
-20 ... +45°C) -FM
-IF = FM Class I, Div. 1, Groups A, B, C & D, T4 (T
amb
-20 ... +45°C) -IF
-CS = CSA Class I, Div. 2, Groups A, B, C & D, T4 (T
amb
-20 ... +45°C) -CS
Sensor housing
-SC = Stainless steel -SC
Prism wash
See flowcell
Example: Sensor: PR-23-RP-73-M20-SS-AX-SC