This page offers a quick reference for vibration sensor selection per ISO 20816‑3, DIN 4150‑3, and ATEX/IECEx. Tables summarize key metrics, hardware, roles, and pitfalls. It also covers Ex d IIC T6 selection, calibration curves, installation tips, tailored advice, certificate management, and FAQs. Designed for maintenance engineers, OEMs, civil teams, and EHS professionals in petrochemicals.