VaporSense contamination-resistant high temperature uv hygrometer
The use of reliable and accurate hygrometers to monitor and control the operation of drying hoods would result in significant energy savings and improvement in product quality. We have developed such a hygrometer, VaporSense, which operates at high temperature and humidity in environments containing high concentrations of particulates and corrosive vapors. VaporSense uses the differential adsorption of light by water vapor at two ultraviolet wavelengths to determine absolute humidity. A uv fiber-optic probe is inserted into the contaminating environment. Optical surfaces are kept clean by a curtain of dry air. VaporSense prototypes have been installed in a variety of industrial drying sites. Stable, long term, contamination free operation was demonstrated. 11 refs., 19 figs.
- Research Organization:
- EG and G Idaho, Inc., Idaho Falls (USA); Spectral Sciences, Inc., Burlington, MA (USA); Pacer Systems, Inc., Billerica, MA (USA)
- DOE Contract Number:
- AC07-76ID01570
- OSTI ID:
- 6808888
- Report Number(s):
- EGG-M-88263; CONF-8806230-1; ON: DE88016954
- Resource Relation:
- Conference: International symposium on optical engineering and industrial sensing, Dearborne, MI, USA, 26 Jun 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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