[Dzl] and his rather serious looking son are metal detector enthusiasts. But when they couldn’t find their store-bought metal detector earlier this summer they just went ahead and built their own.

Multi-frequency detectors detect over a range of frequencies at the same time, making them a good choice for serious hobbyists, especially those who plan to search in wet conditions. They’re ...

New state-of-the art knife detectors are to be deployed throughout West Yorkshire in a bid to further tackle serious knife crime. The five fully-portable units could detect concealed weapons ...

Derailment detectors are installed above freight car bogies. When a bogie derails, they detect the resultant vibration and automatically trigger emergency braking. In the past, accidents often ...

Derailment detectors are installed above freight car bogies. When a bogie derails, they detect the resultant vibration and automatically trigger emergency braking. In the past, accidents often ...