A test device for a detector for detecting gas or a gas/particle mixture, includes a joining means for joining the test device to the detector; a container configured so as to receive a gas or a test gas/particle mixture; a diffusion means associated with the container and designed to diffuse the gas or the test gas/particle mixture in the detector; an energy source; and a radio apparatus able to manage local radio communication in order to remotely trigger the diffusion of the gas or of the test gas/particle mixture in the diffusion means from a control means. A test system comprising at least one test device, at least one radio gateway, a control network comprising a control unit able to remotely control the test device and at least one communication link between the control unit and the radio gateway, said gateway being able to connect the radio apparatus and the control network.

A test device for testing of an oxygen sensor uses a compressor to draw air from an external environment and deliver compressed air into a gas separation unit. A gas separation membrane is located in a passage of the gas separation unit such that compressed air from the compressor travels through the passage and passes through the gas separation membrane. The gas separation membrane separates at least one of nitrogen and oxygen from the compressed air to produce a calibration gas having a calibrated amount of oxygen that is different from an amount of oxygen in the air. The calibration gas coupling is configured to be fluidly connected to the oxygen sensor such that the calibration gas is deliverable from the calibration gas coupling to the oxygen sensor.

A gas measuring device (100, 400). The gas measuring device (100, 400) includes a chemical gas sensor (103, 417) and a testing unit (101). The testing unit (101) includes a base, a gas duct arrangement arranged at the base with a first gas duct (111, 401) and with at least one additional gas duct (113, 405) and at least one electrochemical gas generator (105, 403, 407). The at least one gas generator (105, 403, 407) is configured to send at least one test gas into the first gas duct (111, 401) in a first state and into the at least one additional gas duct (113, 405) in an additional state. The first gas duct (111, 401) and the at least one additional gas duct (113, 405) are each configured to send at least one gas to the gas sensor (103, 417). The first gas duct (111, 401) differs from the at least one additional gas duct (113, 405).

A method for testing a plurality of sensor devices, a panel and a sensor component are disclosed. In an embodiment a method includes providing the plurality of sensor devices, each sensor device including a sensor element configured to sense an ambient condition, a heating element to heat the sensor element, connection terminals for a supply voltage and at least one connection terminal for a sense signal indicative of a state of the sensor element, providing a panel including a plurality of groups of connection pads, the connection pads of each one of the groups configured to be connected to the connection terminals of one of the sensor devices, mounting the sensor devices to the groups of connection pads, applying a supply voltage to the sensor devices and concurrently heating the heating elements of the sensor devices to an elevated temperature and calibrating the sensor devices at least one after another.

A system and a method for accurately testing gas leak detectors by considering multiple operational parameters as per the standard requirements are disclosed. The system comprises one or more gas cylinders, a test execution chamber, mass flow controllers (MFCs), and a control system. The test execution chamber is connected to the gas cylinders via test gas pipelines and a plurality of valves, and the mass flow controllers. The test execution chamber further comprises a first chamber and a second chamber, which are connected to form a closed cycle, thereby saving consumption of the testing gases. The control system in communication with the mechanized system, thereby controlling the operation of the system for accurately testing the gas leak detector test samples. The performance of the one or more gas leak detector test samples is controlled by adjusting the density of the testing gas to a predetermined value and as per the standard requirements.

A mobile gas monitor is presented. In accordance with some embodiments, a mobile gas monitor includes a gas sensor; a mobile device coupled to the gas sensor, the mobile device executing instructions to: read data from the gas sensor; provide calibration; and provide calibrated concentrations based on the data from the gas sensor.

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.

An air quality measurement unit comprising: a housing having an inlet for receiving an air flow and an outlet for venting said air flow; a plurality of sensors positioned in said housing forming an array of sensors, each sensor having a sensor inlet for receiving a portion of the air flow and a sensor outlet for venting said portion of air flow; each sensor arranged to measure an air quality parameter; wherein said sensors are placed such that the sensor inlet is positioned adjacent to the inlet.

In an embodiment, a hydrogen monitoring system comprises a plurality of sensing elements that individually comprise a working electrode, a counter electrode, an insulating layer located in between the working electrode and the counter electrode, a catalyst located on an end of both the working electrode and the counter electrode, an electrolyte located on the end of the sensing elements on both the working electrode and the counter electrode, between the working electrode and the counter electrode, and in contact with the catalyst, and an electrical circuit located on an opposite end of the sensing element that connects the working electrode and the counter electrode.

A multi-point air sampling system that can use a field reference subsystem to process sensor feedback to efficiently and reliably monitor and improve air quality within a space. The field reference subsystem can interface with multiple types of multi-point air sampling systems to ensure that sensors are operational and producing accurate measurements. Included within the field reference subsystem can be one or more permeation sources for generating test gases used to evaluate the integrity of the sensors, a processor for receiving the results of the test-gas evaluations to recurrently verify the operation level of each sensor, and a reporting system for carrying out actions in response to the recurrent verification of the sensors.