The present invention includes: connecting a pressure varying device to a sample gas introduction port and a gas discharge port of a gas analysis apparatus; depressurizing or pressurizing the sample gas introduction port and the gas discharge port by the pressure varying device; introducing calibration gas from a calibration gas introduction port of the gas analysis apparatus in a depressurized or pressurized state; and calculating a pressure correction factor for the gas analysis apparatus with use of a measurement result of the calibration gas by the gas analysis apparatus.

Provided is a gas sensor and methods of monitoring the same. The gas sensor may detect gas restrictions within the gas sensor. The gas sensor may include a test gas diffusion path allowing for monitoring of restrictions within the gas sensor. A pulse of test gas may be electrochemically generated into a void disposed between the membrane and capillary of the gas sensor. The resulting transient signal on the sensing electrode may be analyzed to determine the degree of restriction present in the gas sensor.

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.

Embodiments relate generally to a gas detector test fixture (102) that recycles test gas, which can then be reused. A portable gas detector test fixture (102), comprises a test chamber (104), a processor (134), a docking connector (132) communicatively coupled to the processor (134), an output device (138) communicatively coupled to the processor (134), a memory (136) communicatively coupled to the processor (134), and an application (137) stored in the memory (136) that, when executed by the processor (134), is configured to conduct a bump test on a portable gas detector (106) plugged into the docking connector (132) and to output the bump test result to the output device (138). The test fixture (102) further comprises an inflow line (124) configured to connect to a test gas supply line (120) of a test gas container (118), where the inflow line (124) is coupled to the test chamber (104), and an outflow line (130) configured to connect to a test gas return line (126) of the test gas container (118), where the outflow line (130) is coupled to the test chamber (104).

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.

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 gas detector is tested by releasing detectable gas from a storage medium and delivering it to the gas detector. A cartridge for delivering detectable gas includes a container with an outlet and a storage medium in the container. Detectable gas is stored in the storage medium for being desorbed from the storage medium. A test device can include a receptacle for receiving the cartridge, an interface for fluidly coupling the device to a gas detector, and passaging to provide fluid communication between the interface and both the cartridge received in the receptacle and external air. A pump can pump external air and the detectable gas released from the cartridge through the passaging and interface such that the pumped detectable gas and air form a proportioned mixture for testing the gas detector.

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.

The invention relates to a method for testing a gas sensor by exposure to a test gas by a test device. The invention also relates to a test device for testing a gas sensor by applying a test gas. The invention also relates to a system comprising a gas sensor and a test device for testing the gas sensor by applying a test gas.

A device (1) includes a pumping device (7) and a control unit (70) and is configured to test the operational capability of a gas guide element (3) in a gas-measuring system (11) that includes a gas sensor (5). The control unit (70) carries out steps with two operating states including delivering a test gas (91) by the pumping device (7) through the gas guide element (3) to a remote measuring location (80) and is subsequently delivered from the measuring location (80) to the gas sensor (5). Measured values of a gas concentration are detected by the gas sensor (5) during the delivery from the remotely located measuring location (80) to the gas sensor (5) and analyzed to determine whether changes occurring in the detected gas concentration during the delivery from the measuring location (80) to the gas sensor (5) indicate whether the gas guide element (3) is capable of operating.