This product is part of the Harmony XB4 - ATEX D range, an offer of Ø 22mm metal pushbuttons, switches and pilot lights for explosive atmosphere. This emergency switching off pusbutton comes with a mushroom head and key number 455. This offer is specially designed for explosive atmosphere. It is designed for used in dust zone 21-22. It comes with trigger action and mechanical latching and key release operation. It has 1 NO and 1 NC contact with slow-break operation. This is a metal emergency stop pushbutton with a 40mm diameter mushroom head. This offer is specially designed for applications in Oil and Gas industry as well as Food and beverage, car gas stations etc. It is an IP66, IP69, IP69K and IP67 rated product and comes with INERIS 04ATEX9004U certification. It is easily installed into a standard 22mm diameter panel cut-outs and connected to control circuits with screw-clamp connections. The Harmony XB4 range offers innovative features for simple and efficient use. The Harmony XB4 - ATEX is the most comprehensive explosive Atmospheres range covering most applications.