www.pmmag.com/articles/86783-web-exclusive-br-technical-concepts-surround-sensor-technology
WEB EXCLUSIVE!
Technical Concepts' Surround Sensor Technology
July 22, 2004

The AutoFaucet® with Surround Sensor Technology (SST) from Technical Concepts is activated as soon as hands are placed above it, along either side, or underneath. It uses capacitive sensors instead of an infrared beam, and is powered by batteries that last up to three years.