An Arduino can measure time, a coil and a resistor will create a delay proportional to the circuit values, and metal around the coil will change the coil’s inductance.

After some searching, I ended up using a microcontroller and a piece of code borrowed from the web that I tweaked and adapted. The microcontroller-based concept was chosen because I wanted to scale ...

Because of the affordability and seeming ubiquity of the Arduino platform, they have been hard at work this last month trying to get their Geiger counter sensor board for an Arduino out the door.

12:22 pm September 9, 2016 By Julian Horsey Using the power of Arduino, Evan Kale has ingeniously transformed a weed wacker into an Arduino-powered metal detector.

The sensor also offers switching distances up to 75mm, as well as flexible mounting configurations. The sensors detect all metals at the same rated distance and feature extended range ...

A team at the University of Cincinnati says its sensor is the first lab-on-a-chip able to consistently pinpoint levels of highly electronegative manganese and will be tested in rural Ohio in 2012.

Researchers at Southwest Research Institute developed an embedded sensor system that detects paint and nonmetallic coating degradation on metal structures before it's visible. The sensor measures ...