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Browsing by Author "Saffell, John R."

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Formaldehyde sensor using non-dispersive UV spectroscopy at 340nm

Davenport, John; Hodgkinson, Jane; Saffell, John R.; Tatam, Ralph P. (International Society for Optical Engineering; 1999, 2014-05-22)

Formaldehyde is a volatile organic compound that exists as a gas at room temperature. It is hazardous to human health causing irritation of the eyes, nose and throat, headaches, limited pulmonary function and is a potential ...
Instrumentation for quantitative analysis of volatile compounds emission at elevated temperatures. Part 1: Design and implementation

Lourenço, Célia; Bergin, Sarah; Hodgkinson, Jane; Francis, Daniel; Staines, Stephen E.; Saffell, John R.; Walton, Christopher; Tatam, Ralph P. (Nature Publishing Group, 2020-05-26)

A novel suite of instrumentation for the characterisation of materials held inside an air-tight tube furnace operated up to 250 °C has been developed. Real-time detection of released gases (volatile organic compounds (VOCs), ...
Instrumentation for quantitative analysis of volatile compounds emission at elevated temperatures. Part 2: Analysis of carbon fibre reinforced epoxy composite

Lourenço, Cecilia; Bergin, Sarah; Hodgkinson, Jane; Francis, Daniel; Staines, Stephen E.; Saffell, John R.; Walton, Christopher; Tatam, Ralph P. (Nature Publishing Group, 2020-05-26)

We have investigated the release of gases and volatile organic compounds (VOCs) from a carbon fibre reinforced epoxy composite matrix used in aircraft structural components. Analysis was performed at several temperatures ...
A measurement strategy for non-dispersive ultra-violet detection of formaldehyde in indoor air: Spectral analysis and interferent gases

Davenport, John; Hodgkinson, Jane; Saffell, John R.; Tatam, Ralph P. (Institute of Physics, 2015-12-14)

We have conducted an extensive review of published spectra in order to identify a region with potential for detection of formaldehyde in indoor air. 85 chemicals and chemical groups common to the indoor environment were ...
Noise analysis for CCD-based ultraviolet and visible spectrophotometry

Davenport, John; Hodgkinson, Jane; Saffell, John R.; Tatam, Ralph P. (Optical Society of America, 2015-08-17)

We present the results of a detailed analysis of the noise behavior of two CCD spectrometers in common use, an AvaSpec-3648 CCD UV spectrometer and an Ocean Optics S2000 Vis spectrometer. Light sources used include a ...
Non-dispersive infra-red (NDIR) measurement of carbon dioxide at 4.2μm in a compact and optically efficient sensor

Hodgkinson, Jane; Smith, Richard; Ho, Wah On; Saffell, John R.; Tatam, Ralph P. (Elsevier Science B.V., Amsterdam., 2013-09-30)

Non-dispersive infra-red (NDIR) gas detection has enjoyed widespread uptake as a result of development of devices in the standard miniature format for gas sensors, consisting of a cylinder with external dimensions of 20mm ...

Browsing by Author "Saffell, John R."

Browsing by Author "Saffell, John R."

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