The series 61 E-Stop Switch Compact has added IP66 certification in addition to the existing IP67 and IP69K. IP66 certification provides protection against powerful waterjets, IP67 provides protection against immersion up to 1 m in depth, and IP69K provides protection against powerful high-temperature waterjets, making the product suitable for critical functions in hazardous environments, especially space-restricted applications. It also meets EN ISO 13850, EN 60947-5-1, EN 60947-5-5 and EN IEC 60204 certifications. It has a low back panel depth of 21.2 mm and a 27-or 40-mm-diameter lens.