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A hydrogen sensor is a gas detector that detects the presence of hydrogen. They contain micro-fabricated point-contact hydrogen sensors and are used to locate hydrogen leaks. They are considered low-cost, compact, durable, and easy to maintain as compared to conventional gas detecting instruments.
The main principle behind hydrogen gas sensors is to integrate a catalytic material that undergoes changes in its physical properties when exposed to hydrogen. These changes can manifest in various ways, such as shifts in the material's work function or alterations in its surface plasmon resonance .
Additionally, it is industrially produced in significant quantities through activities and facilities like petroleum and natural gas extraction, refining, wastewater treatment, coke ovens, tanneries, kraft paper mills, and landfills. [4] A hydrogen sulfide sensor or H 2 S sensor is a gas sensor for the measurement of hydrogen sulfide. [5]
Electrochemical gas sensor; Electronic nose; Electrolyte–insulator–semiconductor sensor; Energy-dispersive X-ray spectroscopy; Fluorescent chloride sensors; Holographic sensor; Hydrocarbon dew point analyzer; Hydrogen sensor; Hydrogen sulfide sensor; Infrared point sensor; Ion-selective electrode; ISFET; Nondispersive infrared sensor ...
ISE is a type of sensor device that senses changes in signal based on the surrounding environment through time. This device will have an input signal, a property that we wish to quantify, and an output signal, a quantity we can register. In this case, ion selective electrode are electrochemical sensors that give potentiometric signals.
Simplified schematic of a single gap chemiresistive sensor. (not to scale) A chemiresistor is a material that changes its electrical resistance in response to changes in the nearby chemical environment. [1] Chemiresistors are a class of chemical sensors that rely on the direct chemical interaction between the sensing material and the analyte. [2]
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