This document specifies general requirements and performance test procedures for portable and fixed position continuous measuring devices that are used in an in-line or online operating position to measure physical and chemical measurands in water. It excludes chemical test kits and laboratory analysers.

The general requirements include functional facilities that CMDs need to meet users’ applications and information that needs to be included in associated documents.

The test procedures specify uniform methods to be used when determining key performance characteristics of CMDs. The performance tests comprise testing carried out under laboratory and field conditions. It is recognized that for some devices certain test procedures are not applicable.

Statistical procedures are defined for evaluation of the test data.

Example values for performance characteristics for a selection of CMDs for monitoring waste water effluents and receiving waters are detailed in Annex A for guidance.

This document requires the manufacturer of a CMD to provide more technical data for verification than does EN ISO 15839:2006 [7]. Consequently, EN ISO 15839 [7] will be of greater assistance to manufacturers wishing to characterize a new device whereas this document is more focussed on user requirements for the verification of manufacturer’s claims.