Machinery safety and explosion protection are two fields placing extremely high requirements on industrial switchgear. The position switches of the EX-T 335 series from Schmersal meet these requirements and are therefore suitable for the position monitoring of safety guards in explosive atmospheres. The basis series Z/T 335 is a state-of-the-art position switch for many fields of mechanical engineering. The series now has been made compliant with the requirements of explosion protection, as a result of which it is certified to the Atex Directive for applications in the gas Ex Zones 1 and 2 as well as the dust Ex Zones 21 and 22 (equipment category 2 GD). These components also feature an extraordinary long life and high load-bearing capacity: their mechanical lifetime is approximately more than one million of operations. The position switches of the EX-T 335 series have compact mounting sizes. The metal enclosure also withstands high mechanical stresses.