[Huygens Optics] has a VLF-based metal detector that offers much more feedback than just a beep or no beep. This thing is fancy enough to discriminate between types of metal and report back a ...

Many school administrators see metal detectors as a quick fix for gun violence. But do they actually make schools safer, or ...

There are actually several types of motion detectors, each of which works on a slightly different ... behind a lense in a ...

When it comes to household dangers that can kill you, few unsettle me more than carbon monoxide. I wrote about other toxic ...

[Dzl] starts his write up with an explanation of how most oscillator based metal detectors work. This one differs by using an Arduino to read from the metal detecting coil. The circuit starts with ...

More than 5,000 Paterson middle school students must be checked for weapons before they can go to their classes under a new ...

Metal detectors will be installed at all high schools around the district, beginning with Melbourne High School.

When you use links on our website, we may earn a fee. The best metal detectors can make all the difference whether you’re hunting for hidden treasures, searching for your lost keys, or just ...

Unless you’re really into reading fire-related literature, the following guidelines for installation should do the trick for smoke detector placement. Smoke detectors work best on the ceiling ...

Until 1988, lie detectors were ... the act’s protections do not apply to employees of federal, state or local government, nor to certain jobs that handle sensitive work relating to national ...

Women make up roughly half of U.S. labor union membership, but representation in top level union leadership positions has ...