This repair service can be completed only by a 3‑A authoriz
ed service center (Vaisala
factory or regional headquarters).
10.5 Compact process refractometer
PR‑23‑GC
Compact process refractometer PR‑23‑GC is designed f
or the general industry small pipeline
and bypass line applications, for example, in chemical, oil, gas, petrochemical and kraft
pulping processes.
10.5.1 PR‑23‑GC sensor model c
ode
Table 28 PR‑23‑GC sensor model c
ode
Model Description
PR‑23 Sensor
Sensor model
‑G General
C Compact type for pipeline installations
Refractive index range limits
‑7
3 R.I. 1.320–1.530 n
D
sapphire prism
‑74 R.I. 1.260–1.470 n
D
sapphire prism
‑82 R.I. 1.410–1.620, YAG prism
‑9
2 R.I. 1.520–1.730, GGG prism
Process connection
‑K L coupling 76.1, insertion length 14 mm
Sensor wetted parts material
SS AISI 316 L
HA Alloy 20
HC Alloy C276 / ASTM C276
NI Nickel 200/201
TI Titanium ASTM B348 GR 2
Electrical clas
sification
‑GP General purpose
‑A
X ATEX and IECEx certified Ex II 3G, Ex nA IIC T4 Gc (up to zone 2) (T
amb
−20 … +65 °C)
PR-23 Series User Guide
IM-EN-PR23-E
122
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