SMC's hygienic auto switches were designed to work in areas where the cylinder surface is washed.  Rail mounting allows a freely adjustable mounting position, including intermediate positions.  These switches are designed with as many curves as possible and no recessed areas leaving extremely small amounts of residual cleaning solvent.  D-F6 auto switches have a stainless steel case and set screw. 

• Rail mounting allows freely adjustable mounting position, including intermediate positions
• Stainless steel case and set screw
• 3mm opening between cylinder and switch for drainage
• CE marking
• Waterproof construction: IP67