These things are not cheap, since they are essentially ‘just’ a switch with a long probe, But, as with anything specialised and machined with tight tolerances, you can understand why they cost ...

This probe design is little more than a 3D printed case, an old power supply toroid, and a conventional alligator clamp to make the business end. The sensor uses a ferrite core and a hall effect ...

Penny Linn CEO Krista Leray sits down with TODAY’s Dylan Dreyer about going from working for Major League Baseball to turning her needlepoint ... resigns after probe into personal conduct ...