Model Description
Refractive index range limits
73 R.I. 1.320–1.530 n
D
sapphire prism
74 R.I. 1.260–1.470 n
D
sapphire prism
Electrical classification
‑GP General purpose
‑AX ATEX and IECEx certified Ex II 3G, Ex nA IIC T4 Gc (up to zone 2) (T
amb
−20 … +65 °C)
‑FM FM certified Class I, Div.2, Groups A, B, C, D T6 (T
amb
−20 … +45 °C)
‑CS CSA certified Class I, Div.2, Groups A, B, C, D, T4 (T
amb
−20 … +45 °C)
‑IA ATEX and IECEx certified Ex II 1G, Ex ia IIC T4 Ga (up to zone 0) (T
amb
−20 … +65 °C)
1)
‑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
‑EC Epoxy coated stainless steel
1) Available with STR indicating transmitter and IS isolator only.
Example: Sensor: PR‑23‑MS73‑GP‑EC
Table 45 Flow cell for sensor PR
‑23‑MS
Model Description
Process connection
F2 Flow cell body with flare fitting
P2 Flow cell body with Pillarâ fitting
Line size connection diameter
‑025 ¼ in
‑050 ½ in
‑075 ¾ in
‑100 1 in
Flow cell wetted parts material
‑TM Modified PTFE Ultra-Pure PTFE (Polytetrafluoroethylene)
Chapter 10 – Sensor specifications
151
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