decipher chemical formulas by using a combination of neutrons, gamma rays and alpha particles.
Traditionally, outdoor security sensors are meant to detect intruders as soon as they enter a protected area and before they can gain access to people or valuable assets. Systems from such firms as Perimeter Products and Senstar-Stellar, both of Fremont, Calif., have outdoor systems that face unique environmental conditions such as temperature extremes, rain, snow, animals, blowing debris, seismic effects, terrain and traffic.
Many types of traditional outdoor sensors protect the perimeter of American and international facilities.