An apparatus for determining a presence, a concentration or a change in concentration of a target material in an environment is disclosed. The apparatus comprises first and second sensors configured to respond to the target material. The apparatus further comprises a fluid inlet in fluid communication with the environment, and a valve assembly having a first and second configuration. In the first configuration, the fluid inlet is in fluid communication with only the first sensor. In the second configuration, the fluid inlet is in fluid communication with the first sensor and the second sensor.

The present invention relates to an information processor. The information processer comprises a diagnostic unit for diagnosing a state of a humidity sensor, the diagnostic unit diagnosing that the humidity sensor is in a deteriorated state when days on which a proportion of detection data of the humidity sensor indicating 100% humidity out of all detection data for one day is equal to or greater than a reference proportion, have persisted for a reference period.

An air quality monitor carried by a smart phone and an air quality monitoring system carried by the smart phone are provided. The quality monitor carried by the smart phone includes a shell body, wherein a sensor is provided inside the shell body; a plug is provided on the shell body for being connected to the smart phone; a signal output terminal and a power input terminal of the sensor are both connected to the plug; wherein no power source or power source managing module is provided inside the shell body; no display module is provided on the shell body. Product weight and volume are greatly reduced, in such a manner that a product of the present invention is easy to carry. An air quality monitoring system carried by a smart phone includes: the smart phone, wherein the smart phone comprises a port and a signal processing system.

A safety application mobile measuring device (100) includes a control unit (110) and a detection unit (120). The control unit controls changes between a switched-on state and a switched-off state depending on a received detection signal (112). The detection unit monitors, in the switched-off state, whether a switch-on condition (414) is present and outputs the detection signal, which indicates a change into the switched-on state which is to be carried out. The detection unit monitors the switched-on state as to whether at least two switch-off conditions (444, 448) are present and outputs the detection signal, which indicates a change into the switched-off state, which is to be carried out, in the presence of at least two switch-off conditions. At least two detection devices (122, 124) each carry out a detection corresponding to the at least one switch-on condition and to the at least two switch-off conditions.

A method of operating a sensor system including at least one sensor for detecting an analyte gas and a control system includes electronically interrogating the sensor to determine the operational status thereof and upon determining that the operational status is non-conforming based upon one or more predetermined thresholds, the control system initiating an automated calibration of the sensor with the analyte gas or a simulant gas.

An inspection apparatus capable of performing responsivity inspection on a plurality of gas sensors at equivalent accuracies is provided. The inspection apparatus includes a plurality of inspected sensor disposing parts that are provided halfway through one gas flow path at equal intervals in an extending direction of the flow path and in each of which a gas sensor to be inspected is disposed, and a plurality of straightening plates provided upstream of each of the inspected sensor disposing parts on the gas flow path and separated at a constant distance from the inspected sensor disposing parts. The straightening plates each include a rectangular opening orthogonal to the gas flow path and open to the gas flow path. When the gas flow path extends in one direction in a horizontal plane, the opening has a longitudinal direction along a direction orthogonal to the one direction in the horizontal plane.

An in-flight safety enhancing system including: a combined automatic dependent surveillance broadcast (ADS-B) and carbon monoxide (CO) detecting device configured to receive an ADS-B transmission and obtain a CO reading; and a flight application executing on an aircraft crew computing device separate from the combined ADS-B and CO detecting device, and configured to: receive the ADS-B transmission and the CO reading; augment the flight application with information extracted from the ADS-B transmission; and provide a CO status notification when the CO reading exceeds a CO threshold value.

Methods and systems are provided for detecting NOx sensor degradation based on results from a NOx sensor self-diagnostic (SD) test performed after a key-off event. In one example, a method may comprise waiting a duration to perform a SD test of a NOx sensor after a key-off event until engine operating conditions stabilize and reach a set of qualifying conditions. One or more SD tests may be performed after waiting the duration, but outputs generated under conditions where one or more of a temperature at the sensor is greater than a threshold, and an oxygen concentration is outside a threshold range, may be excluded when determining whether or not the NOx sensor is degraded.

A sensor is driven at a first heating power value. The sensor generates a sensing signal that is indicative of a sensed entity. A possible onset of a sensor contamination condition is detected as a function of the sensing signal generated by the sensor. If such detecting fails to indicate onset of a sensor contamination condition, the sensor continues to be driven at the first heating power value. However, if such detecting indicates onset of a sensor contamination condition, a protection mode is activated. In the protection mode, the sensor is driven at a second heating power value for a protection interval, where the second heating power value is lower than the first heating power value. Furthermore, the operation may refrain from supplying power to the sensor for a further protection interval, wherein the further protection interval is longer than the protection interval.

A portable gas detecting and monitoring apparatus includes a case having a continuous sidewall including a first end closed a first end cap, and a second end closed by a second end cap connected sealably and removably to the continuous sidewall. The continuous sidewall is triangular between the closed end and the open having three sides and three corners, two of the three sides being straight and equal in length, one of the three sides being rounded, and each of the three corners being rounded. A gas detection and monitoring unit mounted in the case includes gas, pressure, and temperature and humidity sensors in communication with an ambient atmosphere outside the case, a data processor operatively connected to the sensors, data storage, an information display viewable through the case, and a calibration unit for calibrating the gas sensor to a predetermined gas concentration measured by the gas sensor.