Abstract: A gas sensor includes a chemiresistor having responsive to a specific gas vapor to be sensed such that a resistance of the chemiresistor changes responsive to exposure to the specific gas vapor. A data collection circuit is coupled to the chemiresistor to sense the change in resistance responsive to the specific gas vapor. An antenna is coupled to the data collection circuit to receive power from an RF interrogation signal, power the data collection circuit with the received power, and transmit a signal from the data collection circuit representative of the resistance of the chemiresistor.

Abstract: An apparatus for measuring body core temperature includes a light guide with an internally reflective tube. The light guide is coupled to an earpiece, and has a lens or an aperture positioned at one of its ends. A sensor is positioned at the other end of the light guide, and a processor is coupled to the sensor. The sensor senses infrared radiation from an infrared source at the end of the light guide, and the processor determines a temperature of the infrared source at the end of the light guide via a transfer function that correlates a measure of the infrared radiation observed by the sensor and an effect of radiation of the light guide.

Abstract: A pressure test method, device, and system of using the same are described herein. One method includes an inflatable with an internally mounted pressure sensor assembly, measuring pressure values, associating the sensor to an identification reader to receive the pressure values from the pressure sensor, and notifying a user of the measured pressure.

Abstract: A device for measuring body core temperature includes a light guide. The light guide is coupled to an earpiece. A first sensor is positioned at a first end of the light guide, and a second sensor is positioned at a second end of the light guide. A processor is coupled to the first sensor and the second sensor. The first sensor senses infrared radiation from an infrared source at the second end of the light guide, and the second sensor measures a temperature of the light guide at the second end of the light guide. The processor determines a temperature of the infrared source at the second end of the light guide by compensating for infrared radiation due to a thermal gradient of the light guide via a regression analysis across a range of ambient temperatures of the light guide.

Abstract: An apparatus for measuring body core temperature includes a light guide. The light guide can be coupled to an earpiece, or it can be a standalone device. The apparatus also includes a sensor positioned at one end of the light guide, and a processor coupled to the sensor. The sensor is operable to sense infrared radiation from an infrared source at the opposite end of the light guide. The processor is operable to determine a temperature of the infrared source at the opposite end of the light guide via a transfer function that correlates a measurement of the infrared radiation observed by the sensor and an effect of radiation of the light guide.

Abstract: A flame detector includes an infrared detector and a first window covering the infrared detector. A second window is positioned in front of the first window. The flame detector is adapted to reject light having a wavelength below approximately 2 ?m and to reject light having a wavelength above approximately 6 ?m, allowing detection of flame from multiple sources. In variations, the windows in combination with the infrared detector may provide the rejection or a band pass filter provides the rejection. Still further variations utilize notch filters or a band reject filter to provide notches of light to the infrared detector corresponding to the wavelength of different flame sources to be detected.

Abstract: Embodiments relate generally to systems and methods for determining end of service life for a respirator cartridge by comparing the gas levels sensed at two or more sample points within the cartridge. Sample streams may run from the sample points to a gas sensor, wherein a valve may control the flow between the sample streams and the gas sensor.

Abstract: Embodiments may comprise personal protective equipment with integrated physiological monitoring. Some embodiments may relate specifically to in-ear devices (such as hearing protection and/or communication devices) having one or more physiological sensors for early monitoring for heat related illnesses. Several embodiments may incorporate a temperature sensor and a speaker into such in-ear device.

Abstract: A device includes a cartridge containing a filter material. An insert extends through at least a portion of the filter material. The insert has gas sample path with an opening to provide a sample of air that is representative of the saturation of the filter material. A return path may be included in the insert to return sampled gas to the filter material. A gas mask contains a gas sensor and coupled to the cartridge, which may be replaced when saturated.

Abstract: A human wearable mask includes a skirt for directly contacting a human wearer and a sound conduction component on the skirt. The sound conduction component can provide an alert notification within high-noise environments while allowing ambient sounds to be heard over the conduction speakers. The sound conduction component may be used to reproduce audio for firefighters and other users who need radio communications.

Abstract: Embodiments relate generally to systems and methods for determining end of service life for a respirator cartridge by comparing the gas levels sensed at two or more sample points within the cartridge. Sample streams may run from the sample points to a gas sensor, wherein a valve may control the flow between the sample streams and the gas sensor.

Abstract: The present disclosure relates to a human wearable mask includes a skirt for directly contacting a forehead of a human wearer, a patch with sensors on the skirt to obtain and provide temperature data from the forehead of the human wearer.

Abstract: A flame detector includes an infrared detector and a first window covering the infrared detector. A second window is positioned in front of the first window. The flame detector is adapted to reject light having a wavelength below approximately 2 ?m and to reject light having a wavelength above approximately 6 ?m, allowing detection of flame from multiple sources. In variations, the windows in combination with the infrared detector may provide the rejection or a band pass filter provides the rejection. Still further variations utilize notch filters or a band reject filter to provide notches of light to the infrared detector corresponding to the wavelength of different flame sources to be detected.

Abstract: A system includes a micro-optic array of pixel elements positioned to receive radiation from a flame. A mid-wave infrared (MWIR) detector is positioned to receive mid-wave infrared radiation from the micro-optic array. A filter is provided to pass mid-wave infrared radiation to the MWIR detector. A controller is provided to sequentially select different sets of pixel elements of the micro-optic array to provide mid-wave infrared radiation to the MWIR detector representative of the flame.

Abstract: Embodiments may comprise personal protective equipment with integrated physiological monitoring. Some embodiments may relate specifically to in-ear devices (such as hearing protection and/or communication devices) having one or more physiological sensors for early monitoring for heat related illnesses. Several embodiments may incorporate a temperature sensor and a speaker into such in-ear device.

Abstract: A piston prover apparatus, method and system for accurately measuring the flow rate of a fluid by the measurement of the position of an internal piston. The piston can be integrated with a poppet valve arrangement located within a cylinder in order to permit fluid (e.g., cryogenic fluid) to pass through an orifice passage when the piston is drawn to an upstream position prior to proving the flow. An actuator in association with a motor and an encoder can be located inside the cylinder. The motor drives the piston to the upstream position of the cylinder when a proving run is initiated. Once the piston is released for the proving run, the initial and final positions of the piston can be accurately measured along with the transit time.

Abstract: A piston prover apparatus, method and system for accurately measuring the flow rate of a fluid by the measurement of the position of an internal piston. The piston can be integrated with a poppet valve arrangement located within a cylinder in order to permit fluid (e.g., cryogenic fluid) to pass through an orifice passage when the piston is drawn to an upstream position prior to proving the flow. An actuator in association with a motor and an encoder can be located inside the cylinder. The motor drives the piston to the upstream position of the cylinder when a proving run is initiated. Once the piston is released for the proving run, the initial and final positions of the piston can be accurately measured along with the transit time.

Abstract: A small volume prover apparatus and method for precisely measuring the flow rate of a fluid via a cylindrical component such as a flow tube. A precision bore cylinder and a piston can be configured with a valve arrangement in order to permit fluid to pass through an annular passage when the piston travels from one position to an opposite position. An accelerometer sensor can be mounted to the piston for continuously detecting the velocity of the piston traveling in the pipe by integrating acceleration data with respect to time data. The volumetric flow rate can be automatically calculated by multiplying the velocity with respect to the area of the flow tube.

Abstract: A device includes a cartridge containing a filter material. An insert extends through at least a portion of the filter material. The insert has gas sample path with an opening to provide a sample of air that is representative of the saturation of the filter material. A return path may be included in the insert to return sampled gas to the filter material. A gas mask contains a gas sensor and coupled to the cartridge, which may be replaced when saturated.