1.		EN 50008 : low voltage switchgear and controlgear for industrial use. Inductive proximity switches. Form A, for direct current, 3 or 4 terminals / European Commitee for electrothecnical Standardization Data Publicação: 1987 Tema: Normas
2.		EN 50010 : low voltage switchgear and controlgear for industrial use. Inductive proximity switches. Methods for measuring the operating distance and operating frequency / European Commitee for electrothecnical Standardization Data Publicação: 1987 Tema: Normas
3.		NF EN 55022 : limites et méthodes de mesure des caractéristiques des appareils de traitement de l'information relatives aux perturbations radioélectriques / Comité Européen de Normalisation Electrotechnique Data Publicação: 1987 Tema: Normas
4.		ENV 41901 : June 1987 / European Commitee for Electrothecnical Standardization Data Publicação: 1987 Tema: Normas
5.		Information technology equipment - radio disturbance characteristics : limits and methods of measurement: EN 55022: September 1987 / European Commitee for Electrothecnical Standardization Data Publicação: 1987 Tema: Normas