K-Patents PR-23 - Manual (Page 84)

76 PR-23 instruction manual
The refractometer models PR-23-M/MS and PR-23-W for aggressive solutions and
ultra-pure fine chemicals can be equipped with a sapphire prism with a refractive in-
dex range 1.2600–1.4600, Figure 9.3.
1.30 1.25 1.35 1.40 1.45 1.50 1.55
M62/W62
M74/W74
N
D
Figure 9.3 PR-23-M/MS/W rangeability with
a sapphire prism (74) and with a standard prism (62)
9.3 Sanitary process refractometer PR-23-AC
The refractometer PR-23-AC is a 3A Sanitary process refractometer for measuring
concentrations in a pipe line. Easy to install in any pipe size directly or using a flowcell.
The Sanitary process refractometer is suitable for all food and beverage processing ap-
plications where on-line monitoring and control can help to improve product quality
and reduce costs.
9.3.1 PR-23-AC sensor model code
MODEL AND DESCRIPTION MODEL
PR-23 = Sensor PR-23
Sensor model
-A = 3A approved
-A
Sensor type
C = Compact type for pipe line installation
C
Refractive Index range limits
-62 = n
D
1.320–1.530 (0–100 Brix) -62
-74 = n
D
1.260–1.470, Sapphire prism -74
-82 = n
D
1.410–1.620, YAG prism -82
-92 = n
D
1.520–1.730, GGG prism -92
Process connection
-H = Sanitary 3A clamp, 2 1/2 inch
-H
-E = Varivent
®
in-line access unit clamp DN65 -E
-ZC = Sanitary I-line male (14 WI) 2 1/2” , insertion length 14 mm -ZC
Sensor wetted parts material
SS = AISI 316 L
SS
RS = Stainless steel AISI 304 RS
HA = Alloy 20* HA
HC = Hastelloy C / ASTM C276 HC
SU = AISI 904L* SU
XS = SAF2205 XS
Electrical classification
-GP = General Purpose
-GP
-AX = ATEX certified EX II 3 G Eex nA II T4 (up to Zone 2) -AX
-IA = ATEX and IECEx certified EX II 1 G Ex ia II C T4 Ga (up to Zone 0) -IA
Sensor housing
-AA = Anodized aluminium
-AA
-SC = Stainless steel -SC
Polishing (option)
-EP = Electropolished process wetted parts (Ra 0.4
μ
m, 15
μ
inch) -EP
* = not 3A approved material