Three alternatives of prism wash systems can be provided:
- Steam wash with integral nozzle, see Prism wash with integral steam nozzle
- High-pressure water with integral nozzle, see Prism wash with integral high-pressure water nozzle
- Steam and water wash for flow cell mounting, see Prism wash with flow through cells
In most of the applications the prism wash is not necessary. However, installing a wash nozzle should always be considered. A prism wash nozzle can be useful in cases where normally no prism coating occurs, for example to clean the prism after a process stop using a manual wash valve. Washing can also be used for operational check (output signal decreases during wash) or as a part of maintenance schedule.