Gas detectors in oil, gas, chemical, mining, and pharma sites must match zone classification and certification. Missing compliance blocks acceptance and creates safety and insurance risk.
Why zones, gas groups, and temperature classes matter
Under IECEx/GB 3836, areas are classified Zone 0/1/2 (gas) or 20/21/22 (dust). Device marks (Ex ia/ib/d/e/n) must match: Zone 0 often needs ia; Zone 2 may allow Ex n or Ex d.
Groups IIA/IIB/IIC reflect minimum ignition energy; IIC is broadest. T1–T6 cap surface temperature below auto-ignition. Using IIB in IIC hydrogen service is a serious hazard. Ex marks are listed in our product catalog.
CE, UKCA, and RoHS for export projects
EU/UK exports typically need CE or UKCA covering EMC, LVD, and ATEX (2014/34/EU). RoHS restricts hazardous substances in PCBs and cables. Missing files risk customs holds or rejection.
Senseiot provides CE/EMC and ATEX copies per model for export. Domestic China projects may need CCC (where applicable), CMC, and sector standards.
SIL functional safety and gas detection
SIL rates safety instrumented functions (SIF). Gas interlocks in SIS need loop-level SIL proof—sensor + logic + final element—not a SIL2 label on the probe alone.
Vendors supply FMEDA or SIL capability (SC) data; integrators follow IEC 61511 for SRS, verification, and proof tests. For SIS projects, contact us early with loop diagrams.
Metrology approvals for production and environmental use
Trade, legal environmental monitoring, or mandated inspections may require type approval (CPA) and manufacturing licenses (CMC). Process safety alarms may not, though specs often ask for traceability.
Separate safety alarm vs. metrology monitoring paths. Senseiot models differ—check certification blocks on datasheets.
Documentation checklist for procurement
Archive Ex certificates vs. nameplates, CE/ATEX or CCC, EMC/environmental reports, SIL/FMEDA if applicable, manuals, sample calibration certs, and spares lists.
Contracts can define authenticity checks. Senseiot bundles certification packs for EPC reviews. Request a quote with target markets and zone tables.