This white paper answers one question: how do the 2026 regulations affect your signal isolators? Pure analogue? Exempt. Smart (HART/RS‑485/Bluetooth)? Mandatory by 11 Dec 2027. ATEX digital DoC? The QR link must stay live for 10+ years – or risk market surveillance action. Jump to your role above for the details, or browse our [Signal Isolator Technical Catalog] for regulation‑ready hardware.