SR EN 50241-1:2003

Specification for open path apparatus for the detection of combustible or toxic gases and vapours -- Part 1: General requirements and test methods

This European Standard specifies general requirements for the construction and testing of apparatus for the detection and measuring of combustible or toxic gases or vapours in ambient air by measuring the spectral absorption by the gases or vapours over extended optical paths, ranging typically from one meter to a few kilometers. Such apparatus measures the integral concentration of the absorbing gas over the optical path in units such as LEL meter for combustible gases and ppm meter for toxic gases. NOTE 1: Actual values of concentration can only be deduced where it can be established that the concentration is uniform over the optical path, as for example in very short optical paths (<100 mm). In such cases, the apparatus is within the scope of EN 50054 - EN 50058 and prEN 45544-1 to prEN 45544-4. Apparatus falling within the scope of this European Standard is classified as follows by the following types. Type 1: an optical transmitter and receiver, located at either end of a path through the atmosphere to be monitored. Type 2: an optical transceiver (i.e. combined transmitte

General information

Status : Withdrawn
Approval date : 10/30/2003
Publish date : 10/31/2003
Withdrawal date : 4/1/2013
Number of pages : 30
ICS : 13.320 Alarm and warning systems,19.080 Electrical and electronic testing
Technical Committee : 137 - Electrical apparatus for explosive atmospheres

Relations with other standards: