A P9 switch by OTTO Controls, also known under the product name P9M, is a switch variation of the pushbutton family, which also includes the P9 and P9L models. A P9 switch is used to control panels, computers, handles and other instruments. Thanks to its IP68S certification, it is predestined for demanding applications. It is perfect for operating on/off modes.

The P9 series offers the same functionality as the P7 series and is an even cheaper alternative. This is due to its durable plastic components that compose the housing and the cap. The P9M is designed for a service life of 200,000 cycles and is available with a gloss or matt finish within a wide range of colours. A version with a flushed or raised cap is also available. The standard threaded housing measures 15/32″.