This edition includes: - Cover of the magazine O Electricista n.º 78 – 4th quarter 2021.- Summary of the magazine O Electricista n.º 78 – 4th quarter 2021. - Solutions for ATEX zones – manufacturer BERNSTEIN.- Distance measurement in automation – manufacturer DI-SORIC.- WDGI encoder… the new incremental industry standard – manufacturer WACHENDORFF.- Safety Rope Pull switch SRO – manufacturer BERNSTEIN (announcement). In the newsletter; in the website and in the social networks of t...