Carlo Gavazzi EC5525NPAP-1 Proximity Sensors Capacitive Proximity Sensor, Non-flush mountable, Sensing Range 25mm, Adjustable 4-25mm, Power Supply 10-40VDC, NPN Output, N.O. and N.C.,M12 Connector, Housing 35 x 15 x 55mm, Tripleshield, Improved EMC performances, IP67