IN SITU HEATED OXYGEN PROBE WITH INTRINSICALLY SAFE OUTPUT

An in situ oxygen analyzer (10) having an intrinsically-safe output (68) and a heated probe (12) is provided. The probe is extendable into a source of process gas and has an oxygen sensor (34) and heater (38) disposed therein. The heater (38) is configured to heat the oxygen sensor (34) to a tempera...

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Bibliographic Details
Main Authors STOJKOV, MARK D, NEMER, JOSEPH C
Format Patent
LanguageEnglish
French
Published 20.11.2014
Subjects
BLASTING
COMBUSTION APPARATUS
COMBUSTION PROCESSES
HEATING
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
LIGHTING
MEASURING
MECHANICAL ENGINEERING
PHYSICS
REGULATING OR CONTROLLING COMBUSTION
TESTING
WEAPONS
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Summary:An in situ oxygen analyzer (10) having an intrinsically-safe output (68) and a heated probe (12) is provided. The probe is extendable into a source of process gas and has an oxygen sensor (34) and heater (38) disposed therein. The heater (38) is configured to heat the oxygen sensor (34) to a temperature sufficient to operate the oxygen sensor (34). A housing is coupled to the probe and has first (36) and second chambers (64). The first chamber (36) is explosion-rated and includes non-intrinsically safe circuitry (50) coupled to the heater (38) to energize the heater (38). The second chamber (64) contains only intrinsically-safe circuitry (72) that complies with an intrinsically-safe specification. The first and second chambers (36, 64) are isolated from one another. The non-intrinsically-safe circuitry (50) is coupled to the intrinsically-safe circuitry (60) through an energy-limiting isolator (70).
Bibliography:Application Number: CA20142911421