This European Standard specifies test methods and performance requirements for portable, transportable and fixed electrical apparatus for the measurement of the oxygen concentration in gas mixtures indicating up to 25 % (v/v).
In the case of inert gas purging (inertization), it applies also to apparatus with an oxygen measuring function for explosion protection.
NOTE The most commonly used oxygen sensors in commercial equipment for industrial application are:
a) paramagnetic sensors;
b) electrochemical sensors (aqueous and solid electrolytes).
This European Standard is applicable to oxygen alarm apparatus 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 a preselected alarm concentration.
It is applicable to apparatus, including integral sampling systems of aspirated apparatus, intended to be used for commercial and industrial safety applications.
It does not apply to external sampling systems, or to apparatus of laboratory or scientific type, or to medical equipment, or to apparatus used only for process control purposes.
BS EN 50104:2002 history
2023BS EN 50104:2019+A1:2023 Electrical equipment for the detection and measurement of oxygen. Performance requirements and test methods
2019BS EN 50104:2019 Electrical equipment for the detection and measurement of oxygen. Performance requirements and test methods
2011BS EN 50104:2010 Electrical apparatus for the detection and measurement of oxygen. Performance requirements and test methods
2002BS EN 50104:2002 Electrical apparatus for the detection and measurement of oxygen - Performance requirements and test methods
1999BS EN 50104:1999 Electrical apparatus for the detection and measurement of oxygen. Performance requirements and test methods