Methods and apparatus allow for passive determination of a driver's Breath Alcohol Concentration (BrAC). Alcohol concentrations can be determined from exhaled breath, however inconvenience to a driver is often a barrier for incorporation of BrAC sensors into vehicles. The methods and apparatus allow for passive determination of a driver's BrAC, while detecting and accounting for a wide range of environmental conditions that may reduce the accuracy of a passive BrAC reading.

Embodiments relate generally to a gas detector test fixture that recycles test gas. A portable gas detector test fixture, comprises a test chamber, a processor, a docking connector communicatively coupled to the processor, an output device communicatively coupled to the processor, a memory communicatively coupled to the processor, and an application stored in the memory that, when executed by the processor, is configured to conduct a bump test on a portable gas detector plugged into the docking connector and to output the bump test result to the output device. The test fixture further comprises an inflow line configured to connect to a test gas supply line of a test gas container, where the inflow line is coupled to the test chamber, and an outflow line configured to connect to a test gas return line of the test gas container, where the outflow line is coupled to the test chamber.

A system for smoke/fire discrimination and identification of the fire source is provided. The system comprises a control unit that is configured to receive data pertaining to gases present in the smoke generated by a burning material and receive data pertaining to temporal characteristics of fire caused by the burning material. The control unit identifies the burning material based on the data pertaining to the one or more gas and the data pertaining to temporal characteristics of fire; and trigger a fire event based on the identified burning material. The control unit identifies and classifies the burning material as one of the known burning materials based on matching of the detected gas and the captured temporal characteristics with the database.

Methods and systems for predicting gas concentration values are described, which may include predictions based on gas measurement information received from a gas sensor and gas sensor response information for the gas sensor. The gas sensor response information which may be in the form of a sigmoid function. In some embodiments, the predicted gas concentration values may be generated by predicting an asymptotic value of the gas measurement information based on a rate of change of the concentration of the gas and the gas sensor response information.

A gas detecting device includes a main body, a gas sensing module, a particulate measuring module and a control module. A chamber is formed within the main body. The main body has a first inlet, a second inlet and an outlet in fluid communication with the chamber. The gas sensing module includes a compartment body, a carrying plate, a sensor and an actuator. The actuator introduces ambient gas into the gas sensing module through the first inlet, and the gas is measured by the sensor and discharged from the outlet of the compartment body. The particulate measuring module is disposed within the chamber of the main body and includes an inlet channel, an outlet channel and a particulate detector. The gas is introduced into the particulate measuring module through the inlet channel, and a concentration of particulates in the gas is measured by the particulate detector.

A method of monitoring catalytic performance of a catalyst used in a reforming process, comprising a) collecting gaseous component data from the reforming process; b) calculating a gaseous component ratio from the gaseous component data; and c) utilizing the gaseous component ratio to estimate an amount of catalytic activity remaining in the catalyst used in the reforming process, a number of days on stream remaining for the catalyst used in the reforming process, or both.

In order to provide a novel determination device capable of determining the type of excretion by a subject and a related technology thereof, a determination device includes at least one processor, and the at least one processor carries out a determination process of determining the type of excretion by a subject by referring to a first gas concentration detected by a first gas sensor and a second gas concentration detected by a second gas sensor which differs from the first gas sensor in gas species to be mainly detected.

An optoelectronic device for detecting volatile organic compounds is described, including a die with a semiconductor body, the die forming a MOSFET transistor and at least one photodiode. The optoelectronic device is optically couplable to an optical source that emits radiation with a spectrum at least partially overlapping the absorption spectrum range of the semiconductor body. The MOSFET transistor is planar and includes a gate region and a catalytic region that is arranged on the gate region such that, in the presence of a gas mixture including volatile organic compounds, the MOSFET transistor can be biased to generate an electrical signal indicating the overall concentration of the gas mixture. The photodiode generates a photocurrent that is a function of the concentration of one or more polycyclic aromatic hydrocarbons present in the gas mixture.

A system and method is described herein for performing at least one industrial process at each facility of a plurality of facilities based on an industrial process standard generated by reducing functional, and trend line outlier bias in data of one or more process parameters as measured by one or more sensors. Outliers are removed from the data set through an objective method. Bias is determined based on absolute, relative error, or both. Error values are computed from the data, model coefficients, or trend line estimates. Outlier data records are removed when the error values are greater than or equal to one or more criteria.

A portable communication device includes a first gas sensor, one or more second gas sensors, at least one port and a calibration module. The first gas sensor is disposed on a first hotplate and is enclosed in an enclosure. The one or more second gas sensors are disposed on one or more second hotplates and are also enclosed in the enclosure. The ports can allow flow of air into and out of the enclosure. The second gas sensors are stable gas sensors, which are used by the calibration module to calibrate the first gas sensor.