Sometimes we need a non-contact liquid level sensor. There are several ways to build that, but the easiest is to try an optical liquid level sensor. You may already have an idea in mind since you are ...

A dust sensor is an optical electronic system to detect fine particles such as dust. In principle, an optical dust sensor detects the dust particle concentration the in air by using an optical sensing ...

An optical sensor that measures hydraulic pressure in the landing gear of a commercial aeroplane has been developed by the UK-based company Druck. Based on low-coherence-light interferometry, the ...

A group at the University of Montpellier's Institute of Electronics and Systems (IES) has demonstrated mid-IR semiconductor lasers grown expitaxially on an on-axis silicon substrate, said to be the ...