Researchers have developed a hydrogel-based strain sensor that measures blood potassium from a single drop of serum in two ...

We’ll see strain gauges more below. Alternatively, the change in resistance could be so small that our meter couldn’t be relied upon, in which case we’d actually be amplifying and ...

The Wheatstone bridge is a ubiquitous circuit configuration that is useful in detecting small changes in resistance.

Strain gauge interior, [CC BY-SA 2.5], via Wikimedia Commons A strain gauge is an electrical conductor that changes resistance as it’s stretched or compressed, but without breaking, buckling or ...