Vaisala K-PATENTS PR-23 Series, Instruction Manual, Page: 87 / 246

9 Sensor specifications 77
9.3.1 PR-23-AC sensor model code
SANITARY COMPACT REFRACTOMETER for pipelines
Model and description Model
PR-23 = Refractometer PR-23
Sensor model
-A = 3-A Sanitary Standard 46-03 certified -A
Sensor type
C = Compact type for pipeline installations C
Refractive index range limits
-62 = R.I. 1.320–1.530 n
D
(0-100 Brix) Spinel prism -62
-73 = R.I. 1.320–1.530 n
D
(0-100 Brix) Sapphire prism -73
-74 = R.I. 1.260–1.470 n
D
Sapphire prism -74
Process connection
-H = Sanitary 3A-clamp, 2½inch, insertion length 14 mm (A) -H
-E = Varivent
®
in-line access unit clamp DN65 -E
-N = Sanitary 3A-clamp, 2½inch, insertion length 14 mm, high pressure, 40 bar at 20°C -N
-ZC = Sanitary I-line male (14 WI) 2½inch, insertion length 14 mm -ZC
Sensor wetted parts material
SS = AISI 316 L SS
HC = Alloy C276 (B)
Electrical classification
-GP = General purpose -GP
-AX = ATEX and IECEx certified Ex II 3G, Ex nA IIC T4 Gc (up to zone 2) (T
amb
-20 ... +65°C) -AX
-FM = FM certified Class I, Div.2, Groups A, B, C, D T6 (T
amb
-20 ... +45°C) -FM
-CS = CSA certified Class I, Div.2., Groups A, B, C, D, T4 (T
amb
-20 ... +45°C) -CS
-IA = ATEX and IECEx certified Ex II 1G, Ex ia IIC T4 Ga (up to zone 0) (T
amb
-20 ... +65°C (C) -IA
-IF = FM certified to US and Canadian standards Class I, Div.1, Groups A, B, C, D T4 (T
amb
-20 ...
+45°C) (C)
-IF
Sensor housing
-AA = Anodized Aluminium -AA
-SC = Stainless steel AISI 316 -SC
EHEDG option
-EH = EHEDG Type EL Class I Certified Model
(D)
-EH
Polishing option
-EP = Electropolished sensor wetted parts (RA 0.38µ, 15 µ inch) (A)
(A) For AISI 316 L / EN 1.4335 only
(B) Includes gasket Teflon 2.5" and Ferrule in Alloy C
(C) Available with STR Indicating Transmitter and IS isolator only
(D) for -H, -E, -N options