For four days in May, the San Jose Center hosted Sensors Expo '98. An estimated 5,000 attendees scoured the booths of 250 exhibitors evaluating the latest in sensors, PLCs, computers, instruments, signal conditioners, and data acquisition equipment. Well-attended conference sessions focused on topics such as microelectromechanical systems (MEMS), and biochemical sensing. And more than 70 companies announced new products or services. Here's a look at some of the best.