Model Description
‑IF FM certified to US and Canadian standards Class I, Div.1, Groups A, B, C, D T4 (T
amb
−20 … +45 °C)
1)
‑CX NEPSI Certified for use in Ex nA IIC T4 Gc
‑CI NEPSI Certified for use in Ex ia IIC T4 Ga
Sensor housing
‑AA Anodized Aluminum
‑SC Stainless steel AISI 316
Prism wash
‑SN Integral steam nozzle
‑WN Integral water nozzle
‑WP Integral pressurized water nozzle
‑NC Integral nozzle connection
‑YC Without nozzle connection option
Option
‑VD Vertical Borderline Image Detection (for example, sugar vacuum pan)
1) Available with STR Indicating Transmitter and IS isolator only.
10.6.2 PR‑23‑GP specifications
Table 34 General specifications
Feature Specification
Refractive index range Full range n
D
1.3200 … 1.5300, sapphire prism
Accuracy Refractive index n
D
±0.0002 (corresponds typically to
±0.1 % by weight)
Repeatability and stability correspond to accuracy
Speed of response 1 s undamped, damping time selectable up to 5 min
Calibration With Cargille certified refractive index liquids over full
range of n
D
1.3200 … 1.5300
CORE‑Optics No mechanical adjustments
Digital measurement 3648 pixel CCD element
Light source LED 589 nm wavelength, sodium light
Temperature sensor Built‑in Pt‑1000
Temperature compensation Automatic, digital compensation
Chapter 10 – Sensor specifications
133
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