Fixed IR Hydrocarbon Gas Detector

Specifications

Overview

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• Technical datasheetPDF · 638 KB

Standards explained

• ATEX — EU ATEX Directive 2014/34/EU: equipment for potentially explosive atmospheres

  EU legal requirement for equipment used where flammable gas, vapour or dust may be present. Equipment must be certified for the zone and gas group of the area where it is used.

  Reading the marking: Ex symbol, Group II (surface industry), category 1 (Zone 0/20), 2 (Zone 1/21) or 3 (Zone 2/22), G gas or D dust. Protection concept, e.g. Ex ia (intrinsic safety), Ex d (flameproof), Ex e (increased safety). Gas group IIA, IIB, IIC (IIC most demanding, includes hydrogen). Temperature class T1-T6 (T6 lowest surface temperature).

• IECEx — IEC System for certification to standards relating to equipment for use in explosive atmospheres

  International certification scheme based on the IEC 60079 series; certificates can be checked on the IECEx online database. Many Middle East authorities accept IECEx or ATEX certification.

  Reading the marking: Uses the same Ex marking as ATEX, e.g. Ex ia IIC T4 Ga, with Equipment Protection Level Ga/Gb/Gc.

• IEC 61508 — Functional safety of electrical/electronic/programmable electronic safety-related systems

  Framework for safety-critical instruments. A SIL rating shows the device can be used in a safety function of that integrity level, subject to the overall system design.

  Reading the marking: SIL 1 to SIL 4 (highest). Gas detection and fire equipment is typically SIL 2 or SIL 3 capable.

• EN 60079-29-1 — Explosive atmospheres: gas detectors, performance requirements of detectors for flammable gases

  Covers the measuring accuracy, response time and stability of flammable gas detectors, usually reading in % LEL.