It is flooded with water that must be kept at a constant level, just below the height that ... would be a water level sensor, a way to communicate that water level measurement to a server ...

The size, power, and other metrics of a latest-generation chip-scale atomic clock.

Here’s a neat trick for your next 3D-printer build or retrofit: a Z-axis sensor using a DIY strain gauge made from SMD resistors. We’re betting it could have plenty of other applications ...