A prism wash system is available for PR‑23‑RP. This requires the use of a CFC‑RP‑M20 flow cell in combination with a 2 in ANSI 300 CFC wash nozzle. Both of these components are available from Vaisala. All further components specifically required for the wash system installation, are obtained independently by the customer. These include a 2 in ANSI 300 to 0.5 in ANSI 300 adapter, 0.5 in ANSI check valve, 0.5 in ANSI 300 shut-off valve, 0.5 in supply piping for the wash media.