Disclosed herein are systems and methods for detecting a gas leak at a field site, the system having at least one gas sensor, an acoustic sensor, and a processing unit having a processor and a non-transitory computer readable storage media storing instructions, the processing unit configured to receive signals from the at least one gas sensor and the acoustic sensor. When the instructions are executed by the processor of the processing unit, the signals received from the at least one gas sensor and the acoustic sensor are analyzed to determine a presence of a gas leak, the presence of the gas leak determined if at least one signal received from the gas sensor is above a first gas threshold value and at least one signal received from the acoustic sensor is above a first acoustic threshold value.

Embodiments of a sensor device, method and system employ a multiplicity of environmental sensors as a single monitoring and alerting mechanism, operable to provide a profile of any contaminant in terms of various gases and particles in the atmosphere, quantified in terms of relative concentrations. In various embodiments, the sensor device can comprise hardware and firmware elements, including an electronic control system, a case, a shield and a cover. The environmental sensors can be secured as part of the electronic control system and the shield can be formed so as to facilitate proper channeling of air and sound for effective operation.

A battery-powered, wireless gas sensing unit for measuring a gas concentration, the gas sensing unit comprising a first sensor, a second sensor, a battery unit, a wireless transmitter, a processor and a controller. The first sensor is adapted to frequently measure a value of a first parameter. The second sensor and the processor are controlled to measure the gas concentration only when the value of the first parameter or variation of the value of the first parameter exceeds a predefined first parameter threshold. The wireless transmitter is controlled to transmit the gas concentration only when the gas concentration exceeds a predefined concentration threshold.

We disclose herein an electronic device comprising: a state machine for receiving an output signal from a sensor; a comparator operatively coupled with the state machine; and a first processor operatively coupled with the comparator. The state machine is configured to receive the output signal from the at least one sensor to obtain sensor measurement data and configured to pass the obtained sensor measurement data to the comparator. The comparator is configured to process the obtained sensor measurement data into first processed sensor data, and configured to compare the first processed sensor data with a first predetermined threshold limit. The comparator is configured to inform the first processor about the obtained sensor measurement data if the first processed sensor data exceed the first predetermined threshold limit.

A system that includes a gas sensor, a fresh air flow controller, a sample flow controller, and a system controller. The fresh air flow controller is configured to deliver fresh air to the gas sensor. The sample flow controller is configured to deliver a sample to the gas sensor. The system controller has a processor connected to memory storing instructions that are executable by the processor. When executed, the instructions cause the processor to determine an intermix ratio of the sample to the fresh air, instruct the fresh air flow controller and the sample flow controller to deliver the fresh air and the sample, respectively, to the gas sensor in accordance with the intermix ratio, and receive a sensor reading from the gas sensor after the fresh air flow controller and the sample flow controller have adjusted the fresh air and the sample, respectively.

Embodiments of a sensor device, method and system employ a multiplicity of environmental sensors as a single monitoring and alerting mechanism, operable to provide a profile of any contaminant in terms of various gases and particles in the atmosphere, quantified in terms of relative concentrations. In various embodiments, the sensor device can comprise hardware and firmware elements, including an electronic control system, a case, a shield and a cover. The environmental sensors can be secured as part of the electronic control system and the shield can be formed so as to facilitate proper channeling of air and sound for effective operation.

Embodiments relate generally to systems and methods for gas detection. A method may comprise operating a gas detector with a first alarm setting comprising a first predefined threshold; receiving sensed data of oxygen content in the ambient air; when the sensed data is below the first predefined threshold, activating an alarm; generating an acknowledgement request asking if the gas detector has entered an inert work zone; receiving a response from the user acknowledging that the gas detector has entered an inert work zone; deactivating the alarm; changing the alarm settings of the gas detector to a second alarm setting comprising a second predefined threshold; continuing to receive sensed data of oxygen content in the ambient air; when the sensed data is above the second predefined threshold, activating an alarm; and generating an acknowledgement request for the user asking if the gas detector has entered a normal operation work zone.

Embodiments relate generally to systems and methods for gas detection. A method may comprise operating a gas detector (102) with a first alarm setting comprising a first predefined threshold; receiving sensed data of oxygen content in the ambient air; when the sensed data is below the first predefined threshold, activating an alarm (110); generating an acknowledgement request asking if the gas detector has entered an inert work zone (122); receiving a response from the user acknowledging that the gas detector has entered an inert work zone; deactivating the alarm; changing the alarm settings of the gas detector to a second alarm setting comprising a second predefined threshold; continuing to receive sensed data of oxygen content in the ambient air; when the sensed data is above the second predefined threshold, activating an alarm; and generating an acknowledgement request for the user asking if the gas detector has entered a normal operation work zone (120).

The present disclosure is directed to a gas sensor device that includes a plurality of gas sensors. Each of the gas sensors includes a semiconductor metal oxide (SMO) film, a heater, and a temperature sensor. Each of the SMO films is designed to be sensitive to a different gas concentration range. As a result, the gas sensor device is able to obtain accurate readings for a wide range of gas concentration levels. In addition, the gas sensors are selectively activated and deactivated based on a current gas concentration detected by the gas sensor device. Thus, the gas sensor device is able to conserve power as gas sensors are on when appropriate instead of being continuously on.

Embodiments relate generally to systems and methods for gas detection. A method may comprise operating a gas detector with a first alarm setting comprising a first predefined threshold; receiving sensed data of oxygen content in the ambient air; when the sensed data is below the first predefined threshold, activating an alarm; generating an acknowledgement request asking if the gas detector has entered an inert work zone; receiving a response from the user acknowledging that the gas detector has entered an inert work zone; deactivating the alarm; changing the alarm settings of the gas detector to a second alarm setting comprising a second predefined threshold; continuing to receive sensed data of oxygen content in the ambient air; when the sensed data is above the second predefined threshold, activating an alarm; and generating an acknowledgement request for the user asking if the gas detector has entered a normal operation work zone.