10.8.2 PR‑23‑M specifications
Table 41 General specifications
Feature Specification
Refractive index range, standard Full range n
D
1.3200 … 1.5300, sapphire prism
Refractive index range, option n
D
1.2600 … 1.4700 , sapphire prism H74
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
Instrument verification With certified refractive index liquids and Vaisala
documented procedure
Ambient temperature −20 °C … 45 °C (−4 °F … 113 °F)
Table 42 Sensor PR‑23‑M specifications
Feature Specification
Sensor PR‑23‑M Teflon body sensor model for aggressive medium
Sensor protection class IP67, Nema 4X
Protection class Protection class 3
Sensor weight 5.0 kg (12.1 lbs)
Table 43 Flow cell for PR‑23‑M specifications
Feature Specification
Process connection Thread G½ in or ½ in NPT female
Process pressure Max. 10 bar (145 psi)
Process temperature Max. 130 °C (266 °F)
Process wetted parts, standard Teflonâ (PTFE) or Kynarâ (PVDF), prism gaskets MTF
(Modified Teflonâ), sapphire prism, O‑ring Kalrezâ,
adaptor sapphire
Chapter 10 – Sensor specifications
149
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