Combustible gas sensor
In a combustible gas sensor having a housing defining an interior containing an electrically conductive reference element and an electrically conducting measurement element coated with a catalyst for the catalytic combustion of a combustible gas and circuitry for measuring the difference in resistance between said measurement element and said reference element as they are heated by combustion of said combustible gas and means for measuring the difference in resistance between said measurement element and said reference element thereby to determine the quantity of combustible gas in a sample, the improvement is described comprising: maintaining said reference element and said measurement element in a common confined space for direct fluid communication therebetween wherein said reference element and said measurement element are disposed in one end of a housing member, a disk having an upper and a lower surface and a slot opening in said lower surface is disposed in said one end of said housing with said reference element and said measurement element being received in said slot and said disk having means for introducing gaseous sample to be tested into said slot whereby said gaseous sample freely communicates with both the said reference element and said measurement element.
- Assignee:
- Rosemount Analytical, Inc., La Habra, CA (United States)
- Patent Number(s):
- A; US 5225786
- Application Number:
- PPN: US 7-782392
- OSTI ID:
- 6340675
- Country of Publication:
- United States
- Language:
- English
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47 OTHER INSTRUMENTATION
CATALYSTS
CATALYTIC COMBUSTORS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTORS
DESIGN
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRODES
FUELS
GAS FUELS
HEATING
MEASURING INSTRUMENTS
OPERATION
OXIDATION
PHYSICAL PROPERTIES
THERMOCHEMICAL PROCESSES