Control housing with piezo technology. Very good cleaning through flat surfaces. Material and surface: Housing made of stainless steel 1.4404 (AISI 316L); blasted and electropolished. Function elements: 2 piezo elements as normally open contacts. Actuation by pressing marked housing area. Connection: 4-pin connector on the back of the switch housing. Protection class: IP 67. Note: Labeling according to customer requirements possible. Food seal optional.