The sanitary process refractometer PR‑23‑AC is connected to the process by a 2.5 in sanitary clamp. The recommended mounting is in a pipe bend, with a vertical flow upwards before the sensor, and a horizontal pipe after. This mounting enables the following:
- Self-cleaning of prism due to the flow directed against its surface.
- Efficient drainage when the pipe is emptied.
For pipe diameters of 3 in or above, a ferrule is welded directly to the pipe wall (a ferrule, length 21.5 mm, is delivered with standard sensor delivery from Vaisala).
The flow cells are exchangeable with standard 90° bend pieces.