Feature Specification
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 55 PR-23-SD and isolation valve SDI-23 specifications
Feature Specification
Isolation valve connection Safe‑Drive flange DN 40PN25
Process pressure Static pressure up to 20 bar (300 psi), operational
pressure up to 10 bar (150 psi)
Process temperature -20 … 170 °C (-4 … 340 °F)
Process wetted parts, standard SAF 2205, Duplex steel SS 2377, EN 1.4462, UNS
S31803, spinel or sapphire prism, prism gaskets MTF
(Modified Teflonâ)
Sensor protection class IP67, Nema 4X
Protection class Protection class 3
Isolation valve, process wetted parts SAF 2205, Duplex steel SS 2377, EN 1.4462, UNS
S31803, AISI 316 L, flange gasket Vitonâ, lip seals
Bronze Teflonâ and ELGILOY, AISI 301 spring
Isolation valve, process connection By welding to pipe sizes of 2 … 24 in, for both vertical
and horizontal pipelines
Prism wash Retractable steam wash nozzle with check valves,
high-pressure water wash nozzle.
Sensor and valve weight 10.5 kg (23 lbs)
Table 56 Safe‑Drive retractor SDR-23 specifications
Feature Specification
Safe‑Drive retractor SDR-23
Retractor weight 7.7 kg (17 lbs)
Chapter 11 – Safe-Drive
171
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