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Find out what cookies we use and how to disable themThis International Standard specifies general requirements for construction, testing and performance, and describes the test methods that apply to portable, transportable and fixed equipment for the measurement of the oxygen concentration in gas mixtures indicating up to 25 % (V/V). The equipment, or parts thereof, may be intended for use in potentially explosive atmospheres (see 4.1) and in mines susceptible to firedamp.Type DE equipment:This standard applies to equipment intended for monitoring oxygen deficiency and/or enrichment.EXAMPLE 1 Monitoring oxygen deficiency and/or enrichment includes:- protection of human health and safety in potentially oxygen deficient atmospheres;- fire protection by monitoring areas with reduced oxygen concentration;- fire protection by monitoring oxygen concentrations exceeding that of normal ambient air. Type IN equipment:This standard also applies to equipment with an oxygen measuring function for explosion protection in the case of monitoring inertisation. Inertisation is an explosion protection technique where a potentially explosive atmosphere is purged with inert gas.This standard is applicable to equipment intended to measure reliably the oxygen concentration, to provide an indication, alarm or other output function, the purpose of which is to give a warning of a potential hazard and, in some cases, to initiate automatic or manual protective action(s), whenever the level exceeds or falls below an alarm set point.This standard is applicable to equipment, including integral sampling systems of aspirated equipment, intended to be used for commercial, industrial and non-residential safety applications.NOTE Commonly used oxygen sensors in commercial equipment for industrial application are:- electrochemical sensors (aqueous and solid electrolytes);- paramagnetic sensors;- zirconium dioxide sensors;- tunable diode laser absorption spectroscopy sensors (TDLAS).For equipment used for sensing the presence of multiple gases, this standard applies only to the measurement of oxygen.This document is not applicable to equipment:– used for medical equipment;– used only in laboratories for analysis or measurement;– used only for process measurement purposes;– used in the domestic environment;– used in environmental air pollution monitoring;– used for flue gas analysis;– used for open-path (line of sight) area gas measurement;– used for sampling systems external from the gas detection equipment.
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