Recently I came across some non-contact liquid level sensors and gathered them out of curiosity. They have been available in the market for the past few years, but this time I was lucky enough to get ...

Researchers have designed a new kind of sensor 1 that can detect minute traces of para-nitrophenol (PNP), a water pollutant. This sensor will be very useful for monitoring the extremely low levels of ...

Many Linear Technology devices use an external PNP transistor to sense temperature. Common examples are LTC3880, LTC3883 and LTC2974. Accurate temperature sensing depends on proper PNP selection, ...

A radar sensor measures solids and liquids in tanks and vessels. It continues measuring during turbulence and buildup inside processing equipment.

Matching a sensor interface with a programmable logic converter or controller hardware that can accept only one type of input—npn or pnp—can be difficult. The last-stage modification circuit described ...