Abstract: A probe for measuring oxygen, temperature, and pressure having a housing, made of a thermally conductive material; an oxygen sensor within the housing, a temperature sensor disposed within the housing adjacent to the thermally conductive material, comprising a fiber Bragg grating, a pressure sensor disposed within the housing, comprising a fiber Bragg grating.

Abstract: A probe for measuring oxygen, temperature, and pressure in a space to be monitored, comprising: a housing, comprising a thermally conductive material; an oxygen sensor disposed within the housing, comprising: a first end having coated thereon a coating which fluoresces at a fluorescent frequency when exposed to light having an excitation frequency in the absence of associated oxygen, and which undergoes a dampening of said fluorescence in the presence of associated oxygen; and a second end operatively connected to an optical fiber that extends through the housing; wherein the first end extends through the housing and is adapted to be exposed to the space to be monitored; a temperature sensor disposed within the housing adjacent to the thermally conductive material, comprising a fiber Bragg grating, or a semiconductor material, such as a GaAS material, wherein the temperature sensor does not extend through the housing and is not exposed to the space to be monitored; a pressure sensor disposed within the housin

Abstract: A probe for measuring oxygen, temperature, and pressure having a housing, made of a thermally conductive material; an oxygen sensor within the housing, a temperature sensor disposed within the housing adjacent to the thermally conductive material, comprising a fiber Bragg grating, a pressure sensor disposed within the housing, comprising a fiber Bragg grating.

Abstract: A gas monitoring device for monitoring gas levels within a chamber is provided. The gas monitoring device includes a housing having a probe with a sensor disposed on the probe. The probe extends through the housing and into a chamber such that the sensor is within the chamber. The housing includes a first passageway disposed about the probe and second passageway disposed about the first passageway. During operation of the gas monitoring device, a temperature adjusting medium enters the second passageway through an inlet of the housing and then enters into the first passageway via the second passageway. As the temperature adjusting medium travels through the first passageway, the temperature adjusting medium adjusts the temperature of the probe. The temperature adjusting medium adjusts the temperature of the probe through thermal conduction. As the temperature of the probe adjusts, the temperature of the sensor also adjusts through thermal conduction.

Abstract: A gas monitoring device for monitoring gas levels within a chamber is provided. The gas monitoring device includes a housing having a probe with a sensor disposed on the probe. The probe extends through the housing and into a chamber such that the sensor is within the chamber. The housing includes a first passageway disposed about the probe and second passageway disposed about the first passageway. During operation of the gas monitoring device, a temperature adjusting medium enters the second passageway through an inlet of the housing and then enters into the first passageway via the second passageway. As the temperature adjusting medium travels through the first passageway, the temperature adjusting medium adjusts the temperature of the probe. The temperature adjusting medium adjusts the temperature of the probe through thermal conduction. As the temperature of the probe adjusts, the temperature of the sensor also adjusts through thermal conduction.

Abstract: A gas monitoring device for monitoring gas levels within a chamber is provided. The gas monitoring device includes a housing having a probe with a sensor disposed on the probe. The probe extends through the housing and into a chamber such that the sensor is within the chamber. The housing includes a first passageway disposed about the probe and second passageway disposed about the first passageway. During operation of the gas monitoring device, a temperature adjusting medium enters the second passageway through an inlet of the housing and then enters into the first passageway via the second passageway. As the temperature adjusting medium travels through the first passageway, the temperature adjusting medium adjusts the temperature of the probe. The temperature adjusting medium adjusts the temperature of the probe through thermal conduction. As the temperature of the probe adjusts, the temperature of the sensor also adjusts through thermal conduction.

Abstract: An inerting system is provided which is adaptable to inert the fuel tank of a vehicle, such as an aircraft. The fuel inerting system includes an oxygen detector, a source of an inert gas, a detector and a fiberoptic probe. The oxygen detector monitors oxygen partial pressure of vapors in an ullage volume of a tank. The source of an inert gas, such as a liquid nitrogen dewar, pressure swing absorption or hollow fiber membrane technology, is in valved communication with the ullage. The detector senses oxygen content in the ullage and controls the flow of inert gas to the ullage to maintain a volume with a proportion of oxygen that will not support combustion. The specific fiberoptic probe enables monitoring oxygen content within the tank without introducing a source of electrical current.

Abstract: A gas monitoring device for monitoring gas levels within a chamber is provided. The gas monitoring device includes a housing having a probe with a sensor disposed on the probe. The probe extends through the housing and into a chamber such that the sensor is within the chamber. The housing includes a first passageway disposed about the probe and second passageway disposed about the first passageway. During operation of the gas monitoring device, a temperature adjusting medium enters the second passageway through an inlet of the housing and then enters into the first passageway via the second passageway. As the temperature adjusting medium travels through the first passageway, the temperature adjusting medium adjusts the temperature of the probe. The temperature adjusting medium adjusts the temperature of the probe through thermal conduction. As the temperature of the probe adjusts, the temperature of the sensor also adjusts through thermal conduction.

Abstract: An inerting system is provided which is adaptable to inert the fuel tank of a vehicle, such as an aircraft. The fuel inerting system includes an oxygen detector, a source of an inert gas, a detector and a fiberoptic probe. The oxygen detector monitors oxygen partial pressure of vapors in an ullage volume of a tank. The source of an inert gas, such as a liquid nitrogen dewar, pressure swing absorption or hollow fiber membrane technology, is in valved communication with the ullage. The detector senses oxygen content in the ullage and controls the flow of inert gas to the ullage to maintain a volume with a proportion of oxygen that will not support combustion. The specific fiberoptic probe enables monitoring oxygen content within the tank without introducing a source of electrical current.

Abstract: An inerting system is disclosed that is adaptable to inert the fuel tank of a vehicle, most typically an aircraft, that includes an oxygen detector to monitor the oxygen partial pressure of the vapors in the ullage (i.e., the overfuel) volume of the tank, a source of an inert gas (e.g., nitrogen) in valved communication with the ullage of the tank, and a detector for sensing the oxygen content in the ullage of the tank and controlling the flow of inert gas to the tillage to maintain that volume with a proportion oxygen that will not support combustion in the event of an ignition source or intrusion of another potentially explosive occurrence within said tank. A specific fiberoptic probe which enables monitoring oxygen content within the tank without introducing a source of electrical current within the tank is also disclosed.

Abstract: An inerting system is disclosed that is adaptable to inert the fuel tank of a vehicle, most typically an aircraft, that includes an oxygen detector to monitor the oxygen partial pressure of the vapors in the ullage (i.e., the overfuel) volume of the tank, a source of an inert gas (e.g., nitrogen) in valved communication with the ullage of the tank, and a detector for sensing the oxygen content in the ullage of the tank and controlling the flow of inert gas to the tillage to maintain that volume with a proportion oxygen that will not support combustion in the event of an ignition source or intrusion of another potentially explosive occurrence within said tank. A specific fiberoptic probe which enables monitoring oxygen content within the tank without introducing a source of electrical current within the tank is also disclosed.

Abstract: The invention comtemplates preparation of glycol/water de-icing mixtures in a demand-operated system wherein index of refraction and temperature are continuously monitored in a recirculating loop. The supply of heat and changes in mixing proportions of separate flows of water and of glycol are monitored until such time as predetermined values of mixed-fluid temperture and refractive index are achieved. A computer accepts monitoring-signal values for mixed-fluid temperature and refractive index, and further accepts ambient-condition signal values for set-point variation in mixing proportions, as necessary for economical use of glycol in the mixture, under each of a plurality of different ambient conditions.