Photometric cell and probe having windows fusion sealed to a metallic body

US5046854A · kind A · utility

Assignee

• THE DOW CHEMICAL COMPANY · US

Inventors

• Joseph P. Weller · Lake Jackson, US
• David P. Denton · Lake Jackson, US
• Sandra V. Lange · Lake Jackson, US
• Chester R. Norman · Lake Jackson, US
• Mary Anne Leugers · Midland, US
• Stuart Farquharson · Meriden, US
• Jean P. Chauvel, Jr. · Lake Jackson, US

Key dates

• Filing date: Jan 24, 1991
• Grant date: Sep 10, 1991
• Expiry date: Jan 24, 2011

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N21/0317
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A photometric probe or a photometric cell having separate windows and a metallic probe body or cell body. The window(s) are sealed to the probe or cell body by brazed or frit seals which are less likely to leak after extended use in high temperature and/or high pressure industrial applications than probes and cells having gasket sealed windows. The windows can be made of sapphire, cubic zirconia, diamond, ruby, glass or quartz and, in the case of the probe, can be in the shape of an Attenuated Total Reflectance prism. The probe or cell body can be Kovar alloy or stainless steel.