The CES-C04-AP/AR transponder coded safety switches from Euchner can now be used in potentially explosive atmospheres in zone 2 (gases) and zone 22 (dusts).The product is placed into a specially developed plastic housing guard to effectively protect the safety switch against the effects of possible impacts, thereby meeting the requirements of the ATEX directive.Status LED indications of the product are readily visible through windows in the housing guard. Installed devices in the field can be retrofitted at any time.