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Evaluation of trace moisture sensors - interim report.

Bell, S A; Gardiner, T; Stevens, M; Waterfield, K* (2002) Evaluation of trace moisture sensors - interim report. NPL Report. CBTLM 19

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Abstract

A review is presented of the current state of industrial trace moisture measurements below about 1 part per million, and of current needs of users of trace moisture instruments. The review and consultation were undertaken as the first workpackage of a project in which the performance of a selection of trace moisture sensors will be evaluated, in order to provide general information and guidance to instrument users.
In this interim report, background information is given about the main measurement methods for this range, together with some discussion of the relative merits of the different approaches. Corresponding information is also given for trace moisture generating instruments. Consultation of users and suppliers of instruments is reported, with summary of their main measurement concerns.
Offers of loans a number of instruments have been received. A proposed shortlist is given, together with an evaluation plan incorporating input from the users surveyed and from the instrument suppliers. The proposed selection includes some precision laboratory instruments, but also several industrial-level probes, reflecting the widespread usage and importance of these.
Also included here is a synopsis of a laboratory study carried out by the US National Institute for Standards and Technology (NIST), evaluating permeation tube moisture generators - work that is complementary to the evaluation of sensors planned in this project.

Item Type: Report/Guide (NPL Report)
NPL Report No.: CBTLM 19
Subjects: Engineering Measurements
Engineering Measurements > Thermal
Last Modified: 02 Feb 2018 13:17
URI: http://eprintspublications.npl.co.uk/id/eprint/2383

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