Semiconductor gas sensors are widespread in application, e.g. for the detection of methane in city gas or carbon monoxide from incomplete combustion [1]. Due to the involved chemistry a sensor element does not react to just one gas component, but with different sensitivities to different gas components. Sensor elements prepared with different additives and different operating temperatures respo...

ZnO and ZnO: Mn nanocrystals were synthesized via reverse micelle method. The structural properties of nanocrystals were investigated by XRD. The XRD results indicated that the synthesized nanocrystals had a pure wurtzite (hexagonal phase) structure. Resistive gas sensors were fabricated by providing ohmic contacts on the tablet obtained from compressed nanocrystals powder and the installation ...

The use of natural gas continues to grow with increased discovery and production of unconventional shale resources. At the same time, the natural gas industry faces continued scrutiny for methane emissions from across the supply chain, due to methane's relatively high global warming potential (25-84x that of carbon dioxide, according to the Energy Information Administration). Currently, a varie...

Methods for estimating a car's length are presented in this paper, as well as the results achieved by using a self-designed system equipped with two anisotropic magneto-resistive (AMR) sensors, which were placed on a road lane. The purpose of the research was to compare the lengths of mid-size cars, i.e., family cars (hatchbacks), saloons (sedans), station wagons and SUVs. Four methods were use...

In this paper is proposed a dynamic torque, rotational speed, and shaft position sensor. It built of magnetic elastomer coating directly applied over rotating shaft. The sensor used for precise measurements changes in torque it usable at high speeds, on the device based material deformation corresponding change field amplitude direction. design simple can acquire reliable readings wide range sp...