Low blood pressure is dangerous when it drops below 90/60 mm Hg and causes symptoms. Signs of dangerous low blood pressure include feeling lightheaded, fainting, and having a fast or slow heartbeat.

Synthesis of nanostructured cubic phase SnO 2 thin film and its trace-level sensing of CO gas This study presents a cubic phase SnO 2 thin film gas sensor with ultra-high CO sensitivity and 1 ppb ...

Optical sensors are a broad class of device for detecting light intensity. This can be just a simple component for notifying when ambient light levels rise above or fall below a prescribed level, or a ...