Manual push-button of alarm for conventional systems of intrinsic safety. Equipped with LED of alarm, resistance for the circuit of alarm of 470 ohms and free contact. Exchangeable crystal. Classification the IInd 1G EEx ia IIC T4. Instalable in interiors, protection IP24. Red color. Dimensions 93 x 89 x 59,5 mm. It includes base for his assembly in surface.